Senior Reservoir Engineer

Date: 16 Feb 2026

Location:

Buenos Aires, AR

Advertised Salary: Competitive

Onshore/Offshore:

Working arrangement: Full Time

Since its creation in 2014, Harbour has grown to become one of the world’s largest and most geographically diverse independent oil and gas companies. Today, Harbour is producing between 475,000 and 485,000 barrels of oil equivalent per day with significant production in Norway, the UK, Germany, Argentina and North Africa. Harbour benefits from competitive operating costs and resilient margins, and a broad set of growth options including near-infrastructure opportunities in Norway, unconventional scalable opportunities in Argentina and conventional offshore projects in Mexico and Indonesia. With low GHG emissions intensity and a leading CO2 storage position in Europe, Harbour remains committed to producing oil and gas safely and responsibly to help meet the world’s energy needs. Harbour is headquartered in London with approximately 5,000 staff and contractors across its operations and offices.

Ours is an inclusive workplace where individuals can bring their whole selves to their job and feel recognised for the value they add. We are committed to creating a genuinely inclusive and supportive working environment to ensure everyone has a positive experience at work.

At Harbour Energy, we aim to recruit, retain and promote our people based on their unique skills, regardless of race, gender or background. We need excellent people to help shape and develop the future of our company. Could this be you?

If so, we want to hear from you.

Purpose of the role:

Responsible for delivering reliable production forecasts, reserves certification, and technical evaluations to support business planning, investment decisions, and joint-venture influence. The role provides independent subsurface and economic assessments across all Argentina BU assets, ensuring alignment with corporate standards and regulatory requirements. Additionally, it supports management, POV and commercial teams with high-quality information and analysis.

Critical Responsibilities:

Support business processes including Long Range Plan, Budget, GFOs, and Reserves & Resources booking and support with ad-hoc headquarter requests.
Participate in internal/external audits, ensure high-quality reserves certification, in order to certify hydrocarbon volumes in all the BU assets
Participate in TCMs and workshops, defending company interests and influencing joint-venture decisions (shale gas, marginal wells, workovers, development strategies).
Support POV Specialist o the joint-venture influencing (JVI) Plan and activities that are essential for ensuring that HBR targets are fulfilled and defended in the asset group.
Conduct technical evaluations using dynamic models, DCA, material balance and other specific reservoir engineering tasks in support of the various producing assets.
Production forecasting for the preparation of the annual Long Range Plan - LRP, Quarterly reviews and or when needed.
Conduct evaluations in APE and SR VM: type well curve generation, benchmarking, production forecasts under constraints and assumptions, opex/capex assessments leveraging market intelligence (Welligence, Woodmac, Rystad, etc.).
Evaluating project performance and project outcomes, generating evaluation reports and presentations
Provide cross-asset support across Argentina BU (Tierra del Fuego and Neuquén) as needed, ensuring continuity in technical evaluations and business processes.
Upon availability perform other Reservoir Engineering related tasks on demand (technical analysis of possible M&A’s and others)
Support Subsurface Manager with information and analysis on HQ and Management Team requests.
Support Commercial Team on understand the short and midterm needs of gas supply.
Promote and embody the HBR’s Culture and Code of Conduct, fostering HBR values in all interactions with internal and external stakeholders. Role-model for effective HSE leadership
Foster cross-functional work, open feedback, and continuous learning, in synergy with other BU and corporate functions.

Ethics and Compliance Responsibilities:

Ensure that all activities and behaviours are carried out in accordance with Harbour Energy’s Ethics and Compliance Policies and Procedures, and to complete any compulsory compliance training as required.

Areas of Accountability, Responsibilty and Competence:

•Determining appropriate reservoir models, decline parameters, and forecasting methods to best represent asset performance.

•Deciding when to challenge operator assumptions and propose alternative development or investment strategies.

•Prioritizing which development opportunities and contingent resources to advance for reserves booking and board approval.

•Selecting key inputs and assumptions (type curves, opex/capex, market benchmarks) for economic evaluations.

Critical Skills, Qualifications, Experience, etc.:

•Solid understanding of local context and market.

•Broad upstream experience, across exploration, development, and project execution.

•Strong analytical skills, with the ability to interpret incomplete data.

•Results-oriented mindset with a track record of achieving targets and delivering measurable business outcomes.

Inclusive recruitment is a vital part of our diversity, equity and inclusion strategy. Whatever your background, if you feel you need an adjustment during our selection process to suit your needs, please let us know, and we will be happy to help.

For further information or support on any of these points, please reach out to us at careers@harbourenergy.com