Technical Director, Geology

We are seeking an outstanding geologist to join Ad Terra as Technical Director, Geology — a global role created to give the Group a single, authoritative geological voice across its own portfolio of energy transition assets and across its consulting mandates worldwide.

Reporting directly to the Chief Operating Officer, the role carries three mandates. The first is technical ownership of the Group’s geological work — play and prospect evaluation, structural and basin analysis, petroleum, helium and hydrogen system analysis, reservoir geology, static modelling, and volumetric and risk assessment — across geothermal, helium, natural hydrogen, lithium, and oil and gas assets. The second is the quality of geological interpretation Group-wide: the methodologies, workflows, and review standards applied by subsurface teams in Geneva, Kuala Lumpur, and our other offices.

The third is scientific output: ensuring that the geological understanding built inside Ad Terra reaches the peer‑reviewed literature and the international conference circuit.

This is a geology‑led role, working hand in hand with the Group’s Technical Directors for Geophysics and Petrophysics and with our reservoir engineering team. Those disciplines own their own interpretations; what we need here is the fluency to work with their products critically — to turn a seismic volume, an inversion result, or a suite of processed logs into a defensible geological story, to understand what the imaging and the logs can and cannot resolve, and to challenge a specialist interpretation constructively without attempting to redo it.

This is a role for a geoscientist who has moved from deep technical practice into technical leadership without losing hands‑on credibility — someone whose interpretations are trusted because they have been tested against the drill bit. The Technical Director, Geology owns the geological scope with full accountability while working inside a wider technical leadership group: the Technical Directors of the other subsurface disciplines;

the Managing Director, Resources & Technical Assurance, who owns resources and reserves governance and project‑level quality assurance; and the Group’s Managing Directors and project teams.

Lead the geological evaluation of Ad Terra’s exploration and development portfolio, from regional screening and play‑based exploration through prospect definition, well proposals, and post‑drill review. Own the conceptual, structural, and reservoir models underpinning geothermal, helium, natural hydrogen, lithium brine, and oil and gas projects. Apply geological risk and uncertainty methodologies consistently — chance of success, probabilistic volumetrics, and scenario‑based modelling — within the resources frameworks owned by the Managing Director, Resources & Technical Assurance.

Lead post‑well and post‑project learning so that every result, positive or negative, feeds back into the Group’s geological models.

Act as the senior integrator of geophysical, petrophysical, geological, and geochemical data into a single coherent subsurface description. Frame the geological questions that acquisition, processing, and logging programmes must answer, then interrogate the interpretations delivered by the geophysics and petrophysics teams rather than simply accept them — testing their geological plausibility and being explicit about resolution, ambiguity, and the alternatives the data will also support.

Own the static models and the workflows that build them: structural frameworks, facies and property models, upscaling, and volumetric realisations, with the assumptions behind each documented. Work…