+31 23 583 08 91 info@petrogenium.com

Petrogenium Team

Leadership Team

Tammo Beishuizen

Founder and Managing Partner

After finishing his MSc. in Mechanical Engineering in Delft, The Netherlands, Tammo worked his entire career in the oil industry in technical, supply, advisory, and business development roles. He worked in technical and supply planning roles at Rotterdam-based BP and Shell refineries and in business development and performance improvement advisory roles at Jacobs Engineering and Shell Global Solutions. Tammo worked with various international oil majors, national oil companies, financial institutions and oil company service providers across the world. In 2010 he started his first business consultancy company which he sold in 2014. Petrogenium was founded in 2015.

Using Petrogenium’s network of world-class professional experts Tammo assumes the Integrator role to help clients in developing and implementing their journey towards margin, reliability and cost improvement.

Outside of work he loves sailing and enjoys good wine. He is married and has three children whom he loves to support from the hockey and cricket boundaries.

Stefan Kardos


Stefan studied Chemical Engineering in Germany and started his career in refining in North Germany. After working in project management, process technology, operations, and consultancy for many Shell internal and external IOC/NOC clients he joined former colleagues on their successful journey with Petrogenium. Stefan holds an MBA from Rotterdam School of Management.

Stefan’s client work spans our entire client portfolio in the downstream oil, petrochemicals, upstream and renewable resources industries. As well as being responsible for service delivery and consultant engagement he heads our oil movement, hydrocarbon supply & logistics practice.

Beyond work, Stefan tries to balance his passion for good food with cycling. He enjoys wrestling with his children and being with friends.


Practice Leaders

Patrik Jacob

Practice Leader Retail

Patrik is a passionate leader who is eager to see the capabilities and the efficiency of organisations and people growing. He is an all-round Retail professional with a high level of business acumen and customer oriented thinking.

He developed his expertise during 20+ years of experience in various leading positions in Petrol Retail companies like Aral and Shell plus numerous international consulting projects in greater Europe.

Patrik significantly contributed to reshaping organisations, implementing improved processes, and increasing profits along with higher customer satisfaction. Besides his outstanding retail knowledge he was an integral part of new market entry strategies, product development, market research projects, and post-merger integration programs.

Colin Schaverien

Practice Leader Renewable Resources

Following his PhD in Chemistry in Bristol, and postdoctoral fellowships at MIT and UC Berkeley, Colin spent 30 years in various R&D and Innovation leadership roles in Shell.

Colin drives the renewables resource section. He supports clients particularly in the areas of biofuels, biorefining, and green chemicals where biorefining means the processing or coprocessing in standard refinery units. We have direct hands-on experience with dedicated hydrotreated vegetable oils (HVO) using 100% vegetable oils, fats, tallow, and other lipid-like feeds, as well as their coprocessing in both hydrotreaters and FCC units. We also have a lot of direct experience with the coprocessing of various lignocellulosic feeds to produce advanced biofuels. In addition, Colin also supports clients on R&D implementation and execution, technology maturation and scale-up from laboratory to commercialisation as well as technology assessment and technical due diligence.

In his free time, Colin tries to improve his single sculling (rowing) technique and enjoys travelling to off-the-beaten track destinations on vacation.

Jörn Falbe

Practice Leader Manufacturing Excellence

After his graduation in Chemical and Industrial Engineering, Jörn worked 15+ years in senior positions for three different Shell refineries in Germany and 10 years in various executive positions with PetroSA, the national oil company of South Africa and pioneer of GTL.

Jörn drives our Manufacturing Excellence section in Downstream Refining, Petrochemicals and Integrated Gas globally. He supports Clients on their journey towards true operational excellence. As an all-round professional with strong hands on skills and extensive experience in the implementation of margin improvement and business enhancement programmes he creates impact and ensures clients can capture lasting value.

Jörn’s passion is mastering organizational change and the implementation of business turnaround strategies. His unique approach to coaching and mentoring of internal talents in customer organizations to deliver sustainable results is well recognized in the industry.

Beyond work, Jörn enjoys spending time with his family and friends, in particular watching soccer matches with his three sons.

Klaas Wieringa

Practice Leader Margin & Sustainability Excellence

Klaas is an all-round refinery professional, combining a broad technology base with extensive experience in performance optimisation. He developed his world-class expertise during 34 years in various positions in Shell and work assignments to a great number of refineries worldwide (Shell, JV and non-Shell). He knows what makes a refinery successful and applied this knowledge during many margin improvement programmes, investment masterplans, and strategic studies.

Klaas is recognized industry-wide as a world-class professional who drives margin improvement, business value enhancement, and sustainability to support our downstream oil and petrochemicals clients. He is very passionate about sustainability in our industry and the energy transition of the world and supports us on the strategic direction of Petrogenium.

Thomas Diehl

Practice Leader for Digitalisation and Aromatics Processing

Thomas is a passionate technologist with many years experience in licensed technology inside plant construction companies. He has led a technology department being responsible for Process Technology design, licensing, start-up, operational support (as licensor), and Research & Development.

Thomas has successfully designed and revamped numerous Aromatics ED units including novel design concepts and energy integration schemes. He also has extensive experience with first start-ups. Besides his core competency he acquired expertise in Digital Process Data Evaluation in a co-operation project with an Artificial Intelligence data company, improving the control scheme of the ED technology. Thomas reached his level of expertise whilst working for LURGI (AirLiquide today), Technip France, and thyssenkruppUHDE/tk-IS.

In 2018 Thomas left tk-IS and started working as consultant for digitalisation (digital process data evaluation). In 2019 he joined Petrogenium as a consultant and is now Pratice Leader for
Digitalisation and Aromatic Processing.

Dipl.-Ing. Fuel Engineering, RWTH Aachen, 1990

Areas of Specialization
Aromatics Extractive Distillation, Pygas and COLO Processing, Basic and Detail Design, Start-up, Troubleshooting, Digitalisation, Scouting and Feasibility Studies, Training and Coaching

Client Directors

Alex Woldhuis

Client director

Alex is a highly driven Client Director with solid experience in building trusting relationships at all organisational levels. In addition to a genuine interest in the opportunities and challenges faced by clients, Alex has an excellent understanding of technical aspects and of the local, cultural, and political landscape — all essential in ensuring the successful delivery of technical support and for building valued partnerships.

He has built up a formidable background in his 28 years working for Shell in project delivery, technical support, and business management roles for technologies in the O&G sector. He worked in a wide range of areas including Environmental Systems, Downstream & Chemicals, and Mid and Upstream businesses.

Alex contributed to shaping Upstream and Midstream improvement programs, scoping support for these programs and managing delivery to the full satisfaction of the clients and stakeholders involved globally.

Next to working for Petrogenium, Alex is leading a start-up that intends to conquer the world with the famous Dutch biscuits: ‘Stroopwafels’. He enjoys sailing, skiing, canoeing, and making road trips with his wife and two sons.

Our Experts

Currently our team consist of more than 65 independent consultants. By 2021 we envisage a team of about 80 experts covering additional knowledge areas in Downstream Refining, Petrochemicals, Gas Processing, Renewable Resources and Downstream Commercial Fuels & Retail. Our consultants are world class technical, operational or business management experts with more than 25 years experience in asset owner roles.

Bert van der Linde

Principal Consultant Hydrocracking, Hydrotreating and Bitumen processes

Bert is a world-class professional with more than 35 years of work experience in hydrocracking processes, catalyst selection, gasoil hydroprocessing for low sulphur diesel production, and catalytic dewaxing. He also has extensive experience in residue hydroprocessing, residue thermal conversion processes, and bitumen manufacturing.

Prior to joining Petrogenium, Bert worked as an independent industry expert, Shell Global Solutions, Shell International, and the Technical University of Delft.

Bert helps technical and operations staff to translate complicated problems into practical solutions using the same pragmatic approach he employed for Shell and other IOCs/NOCs in Europe, USA, Canada, the Far East, and South Africa.

Birgit Juergensen

Managing Consultant Economics, Scheduling and Supply

Birgit is an oil supply chain expert, combining technical understanding with deep experience in simulation and optimisation models to identify hidden margin opportunities in complex systems. She developed her unique expertise during 25 years in several leadership positions in Oil & Gas companies like DEA Mineraloel AG, Shell, and Enbridge. Her successes range from short term margin increase through introduction of new crude oils to speciality refineries to restructuring the unit set up of a refinery in response to specification changes and declining margins.

Her passion is to maximize value in fast-changing operational environments. She has successfully coached and introduced simulation and optimisation tools to planning teams in downstream and midstream sectors to improve margins. This includes optimisation software tools by vendors like Aspen and Haverly and well as simulation tools using discrete event, system dynamics, and agent based simulation components together with gamification approaches. She knows how to make the interfaces between technology, business and IT work and how to find business cases that deliver value.

She uses pattern recognition to identify strategic issues and translate them into pragmatic implementation steps. Experience in project management (waterfall and agile) and change management have been enablers in delivering projects to high satisfaction and with a keen eye on stakeholder management. In the end people deliver the bottom line.

Besides driving for safety, value and pragmatic solutions, Birgit has a deep interest in emerging technologies from renewables to artificial intelligence.
Birgit joined Petrogenium in 2017 as Practice Leader Supply Chain & Economics Excellence.

Bob Scheffer

Principal Consultant Refinery Catalyst Technology and Hydroprocessing

Bob is a passionate chemical engineer with more than 30 years’ international experience in Refinery Catalyst Technology and Hydroprocessing.

His expertise areas are: Hydrocracking, ResidHydroprocessing, Refinery Operations, Catalyst R&D, Catalyst Manufacturing, Catalyst Analyses, Catalyst Technology Training, Gas-to-Liquids, Gas-to-Chemicals, and Research Management.

Bob is recognized as an international expert in Catalyst Technology: he is co-editor of the book “Catalyst Deactivation”, has been a speaker at major conferences (ACS, ERTC, BBTC, IDECAT etc.), a guest lecturer at Delft University of Technology, and is a member of the Board of the Netherlands Catalysis Society.

Brigitte Soella

Principal Consultant Aromatics Extraction and Distillation processes

Brigitte is a passionate leader in the field of Process Engineering, Refinery Technology and Operations. Over the last 30 years Brigitte obtained a set of valuable insights to all process engineering aspects whilst working internationally in the field of Refinery Process Technology Design and Operations.

In particular, Brigitte is recognized as a world-class expert in Aromatics and Distillation Technologies. She was responsible for many feasibility, configuration, rejuvenation, and debottlenecking studies to enhance value creation of one of the biggest refineries in Europe. In addition, she supported many Shell internal and external clients by delivering various feasibility, debottlenecking, detailed design, start-up and commissioning, operations and operational support studies or in-the-field jobs. Doing so she contributed actively to the margin improvement of many refineries in Europe and the Far East.

Brigitte knows how to facilitate a process engineering project from idea generation to successful start-up and she shares our passion for coaching young engineers in the field. Brigitte joined Petrogenium in 2017 as Principal Consultant Aromatics Extraction and Distillation Technologies.

Charu Ehrenreich

Senior Consultant Hydroprocessing, Sustainable Fuels and Green Chemicals

Charu is a passionate chemical engineer with 20 years’ international experience. Her specific areas of expertise are: Hydroprocessing and Hydrotreating Technologies, techno-economical refinery, chemical and bio process evaluations, biochemical and biofuel R&D design and implementation. Charu worked in Shell R&D and Shell’s Technology consulting team out of Amsterdam in the Netherlands for her global Shell and 3rd party customer base. Over the years she developed a deep expertise in many bio-based technologies she evaluated on behalf of Shell to be part of Shell’s renewable strategy. She coached many junior engineers and was hydroprocessing course focal point and lecturer at the Shell Open University.

As well as her very broad technical experience, Charu understands the cultural impact of outstanding services delivery very well and she worked for customers in Europe, in America, and in the Far East.

Egbert van Hoorn

Principal Consultant Amine Treating and Sulphur Processes

Egbert has spent almost his entire career of 35 years in the technical support and troubleshooting of Amine units, Sour Water Strippers, Sulphur Recovery Units and Claus Tailgas Treating Units for a variety of companies serving customers worldwide. He developed very successful training seminars for Amine and SWS as well as for SRU that he has presented more than 100 times.

Egbert joined Petrogenium in 2016, as Principal Consultant Sulphur and Treating Processes.

While working at many different operating sites in the Downstream Oil, Upstream, and Petrochemicals industry, he has gained sound understanding of the integration of Amine, SWS, SRU, and Claus Tailgas Treating units in oil refineries and gas plants. He has expert knowledge on the presence of trace contaminants causing foaming, corrosion, or solvent degradation in the various sour streams.

In the Oil and Gas industry Egbert is considered a world-class Amine, SWS, and SRU expert who is very passionate about creating value for the customer and is willing to share his know-how in an open way.
Deep expertise in theoretical and applied Research and Development as well as operating experience of HDS units complement his profile.

Eugen Hofmann

Managing Consultant Refinery Technologies / Primary Distillation

Eugen is a very passionate technical leader and world-class process engineer with more than 40 years’ international hands-on experience in Refinery Process Technologies and Refinery Operations. In the world of refining he is in particular recognized as a world-class expert in the Distillation Technologies.

Eugen held a variety of leading positions in Refineries and Shell’s Technical head office in the areas of Distillation and Thermal Conversion Technology and Technical and Operational Management. Besides these technical roles he has extensive experience in being bottom line responsible for the HSE performance a country in that Shell operated.

After leaving Shell in 2006, Eugen worked successfully as an independent industry expert in the field of Distillation and Refinery Technology support. He joined Petrogenium in 2017 as Principal Consultant Refinery Technologies/Primary Distillation.

He is an expert user of various Distillation Process Simulation & Pinch Analysis and Process Integration tools.

Besides his very deep technical and operational expertise, Eugen understands very well the cultural impact of outstanding services delivery. Working in multicultural organisations and motivating, guiding, and coaching people to deliver a world-class performance is one of his major strengths. He worked for many customers in Europe, the Middle and in the Far East.

Frank Oehlschlaeger

Principal Consultant Treating and Sulphur Processes

Frank is a world-class expert, with a very broad experience in gas and liquid treating aspects like Amine and Caustic Treatment, Sour Water Stripping, Sulphur Recovery, Tail Gas Treatment, and Adsorption processes.

Frank’s experience covers all relevant aspects from modelling and design (new units, revamp, debottlenecking), treating concept development, operation, troubleshooting, (pre-) commissioning, start-up, training seminars, and  coaching.

Prior to joining Petrogenium, he worked for 28 years with Shell in various refining technology, leadership, project organization, and technology consulting positions.

Frans van den Berg

Principal Consultant Residue Upgrading, Crude Oil and Product Quality

Frans is a passionate leader, researcher, and world-class expert with more than 35 years’ international experience in Syngas Technologies, Catalysis, Residue Hydroconversion, Gas treating, Crude Oil, Heavy Fuel, Jet Fuel Product Qualities, and Emerging Technologies in the Heavy Oil field.

Frans held a variety of technology and managing positions in Shell and was for many years on the forefront of Shell’s innovation strategy of the “bottom-of-the-barrel” commercial products and upgrading technologies.

He authored and co-authored some 30 publications and presentations at international conferences and has 12 patents in his name.

He joined Petrogenium as Principal Consultant Residue Upgrading, Crude Oil and Product Quality in 2017.

Fredrik Sandelin

Principal Consultant Reforming and Isomerisation

Fredrik is an experienced Senior Technologist with 25+ years of experience in the refining industry as a specialist in reforming and isomerisation. He received an M.Sc. in Chemical Engineering in Finland and has a TkD degree (PhD) in Industrial Chemistry. His experience ranges from operations, technical support, process design and modelling to research and development.

Fredrik worked in the Shell Global Solutions Light Ends Conversion team in Amsterdam in the Netherlands. As a subject matter expert he contributed to various margin-improvement studies, energy-saving initiatives, process design, training, troubleshooting, start-up, and turnaround support activities. He has also worked for three refineries in Finland and Sweden on process unit monitoring and support, troubleshooting, turnaround, and refinery development support. In addition, he has extensive process design experience including process modelling.

He has the ability to combine technical knowledge with practical aspects in a client-oriented way.

Gerhard Koebe

Managing Consultant Downstream Commercial

Gerhard is an all-round commercial expert of the Downstream Oil Industry. He developed his extensive expertise during 35+ years of hands-on work in various positions for Shell and Shell Joint ventures. Despite being based most of his career in Germany, he for many years successfully led international sales teams across Central and Eastern Europe.

Gerhard is very passionate about maximising value creation for customers and has an outstanding track record of success in a variety of projects in Business-2-Consumer, Business-2-Business sales, marketing, and merger and acquisition support.

Gerhard joined Petrogenium in 2017 as Managing Consultant.
Throughout his career Gerhard obtained very deep expertise in change management whilst leading complex company restructurings and joint venture integrations. He knows how to manage customer handover, harmonising of contracts, and integration of whole Customer Service Centers and their staff successfully.

He contributed and led highly sensitive commercial negotiations and acquired hands-on experience in lobby- and association work.
Gerhard operated in diverse and sometimes challenging multicultural environments: he knows the daily challenge of leading multinational teams.
Gerhard shares our passion of know-how transfer and enjoys passing on his extensive knowledge via tailor-made consulting or coaching activities.

Jari Marci

Principal Consultant Distillation, Thermal Conversion and Gas Processing

Jari is a passionate process engineer with many years of experience in Refinery and Mid-Stream Process Technology design, licensing, start-up, operation, research and development, and customer unit support. His specific areas of expertise cover residue processing technologies with an emphasis on Visbreaking and Thermal Cracking. Jari has successfully designed and revamped numerous thermal conversion units including novel design concepts and energy integration schemes as well as extensive shutdown and started-up experience. He is familiar with troubleshooting various Visbreaking and Thermal Cracking processes inside and outside Shell. Besides his core competency and admiration for the black-side of Refining, he acquired expertise in Gas Treating, general Gas Processing, and Distillation.

Jari reached his level of expertise whilst working for Shell in Germany and Shell’s Technology consulting team for Downstream and Midstream Processes in the Netherlands where he was responsible for a global Shell, Joint Venture, and external client base.

In 2018 Jari left Shell and joined Petrogenium as Principal Consultant Thermal Conversion Technologies and Gas Processing.

Jan Pranger

Principal Consultant Industrial and Process Safety

In 1985 Jan joined a major Dutch engineering and consulting company. Over a 12-year period he acquired extensive consulting and design skills in many branches of industry. Eventually Jan shifted his consulting activities to industrial and process safety.

In 1998, Jan started his private consulting business. In 2004-2005 he followed a postdoc study in Management of Safety, Health and Environment (MoSHE) at Delft University of Technology. Jan is also an accredited Tripod Beta Assessor, Practitioner, and Trainer.

• Master of Safety, Health and Environment, Delft University of Technology (2005)
• M. Sc. Chemical Technology, Delft University of Technology (1987)

• European Network of Safety and Health Professional Organisations, EurOSHM Registration: 11733530659
• Tripod Beta Assessor, Trainer and Practitioner, accredited by the Stichting Tripod Foundation

Jan Zander

Principal Consultant Energy & Utilities

Jan worked for over 30 years for Shell, during which he was involved in the complete life cycle of Utilities and Energy projects and initiatives. Troubleshooting, project support, training courses, patent, and intellectual property development were a main focus. He continues to be passionate about these subjects since his Shell retirement and has supported two start-ups in project definition and several refineries in troubleshooting.

Ruud Keller

Principal Consultant Laboratory, Analytical and Product Quality Services

Ruud knows how to achieve outstanding operational excellence in laboratories: top quartile performance. For more than 25 years he was responsible for laboratory design and operations at varying scales for oil refineries, chemical plants, and LNG facilities in different countries. He enjoys developing laboratory staff and sharing his know-how and best practices with our clients in the field.

Ton Kloth

Principal Consultant Base Chemicals

Ton spent his entire Shell career of 40 years in technology, operations, R&D, HSE and project functions in the petrochemical industry and central technical support organisations.

He has been active within Shell sites as well as in joined venture and 3rd party operated facilities. During those years he obtained in-depth project cooperation experience with all main Ethylene Contractors in the world.

Ton is an industry recognised technology and operational world-class expert in steam cracking as well as for catalytic processes for the production of light olefins. He has been involved in all aspects, including feasibility studies, configuration studies, rejuvenation/debottlenecking studies, detailed design, start-up and commissioning, operations, and operational support.

As Subject Matter Expert (SME) Olefins, Ton has particular skills in the Oil – Chemical Integration (OCI), Combustion systems (large Pyrolysis Furnaces), Energy recovery systems, Primary fractionation/Heavy Oil/residual oil systems, large turbine/compression systems, deep chilling-cooling equipment and process, fractionation, Operations, Safety and Environment. This is all based on sound understanding of Thermodynamics, Physics, and Process Engineering.

Wim Bond

Principal Consultant Fouling Abatement, Fluid Flow & Solid Handling Processes

Wim is an industry recognized world-class expert with more than 35 years of experience in equipment engineering on fluid flow, filtration, solids handling and equipment fouling abatement, decontamination, mothballing, recommissioning, and process safety of refinery flare systems.

Wim enjoys sharing his deep know-how and experience in a pragmatic and hands-on way.

Wim Bosch

Principal Consultant Hydroprocessing, Thermal Cracking, Reforming, and HF Alkylation

Wim worked at Shell for 35 years in training, technology, and operations functions in both oil refineries and central office technical support organisations. Hence, he has a broad background in the technology, operation, economics, and organisation of oil refineries.

Between 1999 and 2009 Wim was course director of Learning and Development, responsible for developing and delivering training courses on Hydroprocessing, thermal cracking, Reforming, and HF Alkylation.

Wim has lectured all over the world (Europe, North America, Latin America, the Middle East, Asian Pacific, and Africa) delivering numerous courses for both Shell and non-Shell personnel.

Wim has also participated in many energy audits for refineries in Europe, the Middle East, and the Far East.

Graduated in Chemical Reactor Engineering at the Technical University of Twente in 1973 (Master of Science, ir).