Senior Reservoir Manager

Job Summary

The Reservoir Engineer supports the identification, screening and evaluation of upstream oil and gas investment opportunities across the company’s New Ventures and Business Development portfolio.

The role provides reservoir engineering expertise across exploration, appraisal, development and producing assets, supporting opportunity screening, technical due diligence and investment decision-making. The position works closely with geologists, geophysicists and commercial teams to assess reservoir performance, development feasibility and resource potential.

The ideal candidate will bring global upstream experience, having worked across multiple countries, basins and operating environments, with the ability to rapidly assess reservoir performance and development potential in support of investment decision-making.

Job Responsibilities 1

1. Opportunity Screening & Technical Evaluation

• Evaluate upstream investment opportunities including exploration acreage, appraisal assets, development projects and producing fields.
• Conduct rapid reservoir engineering screening of acquisition targets, farm-in opportunities and licensing rounds.
• Assess reservoir deliverability, recovery potential and development feasibility.

2. Reservoir Characterisation & Performance Analysis

• Evaluate reservoir properties including porosity, permeability, pressure behaviour and fluid characteristics.
• Analyse well performance, production history and pressure data to assess reservoir performance.
• Identify key reservoir uncertainties impacting resource recovery and development planning.
• Support well placement decisions and production strategy development.
• Identify data acquisition requirements including well tests, pressure surveys and production logging.

3. Resource & Reserves Evaluation

• Support estimation of resources and reserves across exploration, appraisal and producing assets.
• Perform material balance analysis, decline curve analysis and reservoir performance forecasting.
• Support probabilistic assessments of reservoir uncertainty and recovery potential.

4. Field Development Evaluation

• Evaluate field development concepts including well spacing, production strategies and recovery mechanisms.
• Assess development scenarios, production profiles and recovery factors.
• Provide reservoir engineering input into development planning and project economics.

5. Technical Due Diligence

• Participate in technical data room reviews during acquisitions, farm-ins and asset transactions.
• Review reservoir models, development plans and production forecasts.
• Identify technical risks, uncertainties and value opportunities associated with reservoir performance.

6. Production & Brownfield Evaluation

• Evaluate producing assets including reservoir performance, depletion behaviour and production optimisation opportunities.
• Identify opportunities for infill drilling, workovers, secondary recovery or enhanced recovery methods.
• Assess near-field exploration and development potential.

7. Portfolio Support

• Provide reservoir engineering input into portfolio screening and ranking of upstream opportunities.
• Translate reservoir engineering insights into clear assessments of production potential, recovery factors and development risks.
• Support preparation of technical materials for investment committees and senior management discussions.

Job Responsibilities 2

Additional Responsibilities 3

Job Knowledge & Skills

1. Reservoir Engineering Expertise & Strategic Management
Expert-level technical knowledge of reservoir engineering principles, analysis methodologies, and how to apply advanced techniques to subsurface evaluation. Strategic understanding of how reservoir performance drives asset value and business performance. Ability to establish technical strategy and direction for reservoir portfolios.

2. Global Upstream Operations & Diverse Environments
Deep understanding of upstream oil and gas operations across diverse operating environments, regulatory regimes, and basin characteristics. Knowledge of exploration, appraisal, development, and producing asset management. Understanding of upstream value chains from exploration through production and reserves depletion.

3. Resources & Reserves Estimation Frameworks
Comprehensive knowledge of resource/reserves estimation methodologies, probabilistic assessment, and regulatory compliance requirements. Understanding of material balance, decline curve, and volumetric approaches. Knowledge of reserves auditing and third-party verification processes.

4. Field Development & Production Strategy
Advanced understanding of field development concepts, well spacing decisions, recovery mechanisms, and production optimization. Knowledge of enhanced recovery methods and infill drilling opportunities. Understanding of production forecasting and economic evaluation of development scenarios.

5. Team Leadership & Organizational Development
Advanced capability in team leadership, talent development, and building high-performing technical organizations. Understanding of technical career development 

Job Experience

• Minimum 10 years of upstream oil and gas industry experience, with exposure to international assets and working across different countries, basins and operating environments
• Global upstream experience across exploration, appraisal, development and producing assets
• Experience in asset evaluation, reserves assessment or technical due diligence preferred
• Experience working in multidisciplinary and multicultural teams, integrating geology, geophysics, reservoir engineering, drilling, facilities and commercial inputs
• Experience supporting investment decisions, acquisitions, farm-ins, licensing rounds or portfolio screening in an international upstream context

Competencies

Education