Consultants

A connected team of specialists.

APES brings together consulting expertise across project development, subsurface, wells, facilities, operations, commercial strategy and lower-carbon solutions.

Leadership

Led by practitioners.

We form teams around the scope and the expertise needed to deliver it.

Specialist network

Expertise for each challenge.

Portrait of Graham Clark

Graham Clark

Well engineering

A well engineering leader with 30+ years of drilling and completions experience, including offshore, HPHT and deepwater work. He has led well planning and assurance teams across Asia, Europe and the Middle East.

Portrait of Maria Alejandra Rondon

Maria Alejandra Rondon

Production & asset management

An energy leader with 28+ years in production strategy, forecasting and asset optimisation. Her experience spans WRFM, artificial lift and operational improvement at Origin Energy, Arrow Energy and Brunei Shell Petroleum.

Portrait of Karel Groffen

Karel Groffen

Competence assurance & HSSE

Specialises in global competence assurance, frontline development and HSSE within the APES technical team.

Portrait of Hesam Mehr

Hesam Mehr

Electrical engineering & functional safety

Principal electrical and functional safety engineering expertise for energy projects and facilities.

Portrait of Rick Carter

Rick Carter

Subsurface assurance & decision quality

Four decades across field appraisal, development and more recent CCS decisions. He specialises in risk-based technical assurance, decision quality coaching and capability development, and led the Baram Basin geothermal feasibility study.

Portrait of Gladys Sucre

Gladys Sucre

Flow assurance & CCS systems

More than 20 years in flow assurance, including CO₂ transport and injection system design. She has supported concept selection, FEED and offshore operations for North Sea CCS and international energy projects.

Portrait of Andrew Parker

Andrew Parker

Improved & enhanced recovery

A former Shell subject matter expert in waterflooding and chemical EOR with 35+ years of experience. His work includes the Champion polymer trial and waterflood development in Brunei.

Portrait of Chee Phuat Tan, PhD

Chee Phuat Tan, PhD

Geomechanics & CCS integrity

A geomechanics specialist with 39 years in CO₂ storage containment, reservoir and completion integrity, and coupled geomechanics. He was an SPE Distinguished Lecturer for 2024–25 on managing CCS geomechanical risk.

Portrait of Andrés Peña

Andrés Peña

Asset leadership & operations

An energy executive with 35+ years at Shell, BP and Exxon, including senior offshore asset leadership in Brunei. His focus includes operational excellence, integrated planning and organisational transformation.

Portrait of Alfredo Figueroa

Alfredo Figueroa

Digital evolution

Brings digital evolution expertise to the APES technical team and its work on energy operations.

Portrait of Zulfiqar Dholkawala

Zulfiqar Dholkawala

Wells, CCS & field development

A petroleum and well engineer with 18+ years in completions, field development and well integrity. His CCS experience covers CO₂ injection design, barrier assessment and storage planning, including Bayu-Undan work.

Portrait of Murtaza Amin

Murtaza Amin

Production technology & WRFM

A production technology leader with 30+ years in completions, integrated asset modelling and WRFM. His experience includes major Tullow developments and digital oilfield and production optimisation work.

Portrait of Jan Schreurs

Jan Schreurs

Exploration due diligence

More than 40 years in regional play assessment, seismic interpretation and basin-scale thermal modelling. His experience spans new ventures and mature basins, including Brunei, and extends to geothermal and natural hydrogen.

Portrait of Jean-Yves Chatellier

Jean-Yves Chatellier

Structural geology & exploration

A geoscientist with 40+ years in exploration and production, including discoveries in the North Sea, Venezuela and North America. He integrates geology, geophysics, geochemistry and engineering in complex structural settings.

Portrait of Frédéric Robail

Frédéric Robail

Petrophysics & reservoir characterisation

A petrophysicist with 25+ years in reservoir characterisation and integrated subsurface studies. He has led field development and portfolio work, including Kelidang deepwater gas and global Petronas studies.

Portrait of Dr. Maya Ziari-Reefhuis

Dr. Maya Ziari-Reefhuis

CCUS & sustainable energy

A PhD-qualified scientist and former offshore engineer and project manager with experience across Europe, Asia and MENA. She focuses on CCUS, sustainable energy and Middle East business development.

Portrait of Kiattisak Petpisit

Kiattisak Petpisit

Well construction & strategy

More than 30 years in international well construction equipment and services, including corporate strategy and low-carbon initiatives. His expertise connects technical due diligence with business development and partnerships.

Start a conversation

Find the right expertise.

Tell us about the question you are working through and we will put together the right team.

Contact APES