About Us Ithaca Energy is a leading full cycle exploration and production company headquartered in Aberdeen, Scotland. The business has built a diverse and high value portfolio of operated and non-operated assets across the Northern & Central North Sea and West of Shetland. We are a dynamic and ambitious business on a rapid growth journey, recognising that the energy industry is entering a new era. As we move towards energy transition, our commitment to the North Sea is unwavering. As a leading North Sea Operator, we are an agile and driven business, taking a pragmatic approach to oil & gas production through innovative thinking and advanced technologies. Our goal is to maximise value through the safe, efficient and responsible production of our assets. Success is dependent on our talent and, with bold and inspired people, we will create a workplace that is diverse and equitable, building a culture of collaboration and inclusion. Position Overview Ithaca Energy is accepting applications for the position of Reservoir Engineer, located in our Aberdeen Office. Reporting to the Subsurface Manager, the Reservoir Engineer will support and lead reservoir engineering work across a portfolio that includes operated assets, greenfield developments, and business development opportunities, ensuring high‑quality subsurface input, robust technical assurance, and value‑driven decision‑making. Responsibilities Responsible for delivering high ‑ quality reservoir engineering analysis, evaluation, and technical studies, including but not limited to: Analyse field and wells dynamic behaviour – raw data manipulation and acquisition planning eg PVT, PBU, sampling and other operations to validate field performance and performance predictions. Contribute to defining appropriate reservoir management strategies and data ‑ gathering plans to maximise economic recovery. Perform reservoir modelling and dynamic simulation, history matching and subsurface uncertainty analysis. Use fit-for-purpose integrated predictive tools and models to evaluate incremental well & development opportunities, and to assess production forecasts and reserves. Build, update, and refine reservoir models in collaboration with geoscience, petrophysics, and petrotechnical disciplines Prepare and document production forecasts for producing assets for short-term and life of field forecasting– working with Production team(s) to ensure appropriate Well and Reservoir management. Deliver timely and accurate assessments of subsurface risks, opportunities, and forecasts based on available data. Initiate technical and business cases for incremental projects in order to optimize production and maximizing economic recovery. Provide evaluations of further development strategies and incremental investment projects to mature contingent and prospective resources. Providing technical support to well planning and completions design and execution, including testing and sampling operations as required. Perform reserves and resources estimates, classification, documentation for reserve reporting internally. When required, acting as a technical leader on projects, coordinating cross-discipline activities. Providing technical support/mentoring to other reservoir engineers in the team. Participating in peer reviews on request. Ensure that all relevant information is stored appropriately, identifying issues and propose improvements to the asset team databases. Qualifications & Experience BSc degree or equivalent in reservoir/ petroleum engineering. PhD or MSc in reservoir/ petroleum desired. In depth understanding of all reservoir and petroleum engineering activities. Significant experience of working on development and producing projects mostly in an operated environment. Proficient in the use of computational models for development planning, stimulation design, well performance evaluation, completion design and completion integrity analysis. Use of Prosper MBAL and GAP, Eclipse and TNav, Petrel. Proficient in uncertainty management analysis. Ability to communicate effectively with a wide range of technical disciplines – strong interpersonal skills are essential. Able to simplify, make arguments and present confidently to a variety of internal and external stakeholders. Multi-tasking, prioritisation and an ability to be reactive to urgent deadlines and changing deliverables. Self-starter who can take ownership and demonstrate leadership to deliver technical studies and tasks. Be able to work in a cross-disciplinary environment on multiple assets, simultaneously. Ability to present results and issues, and influence decisions. Willingness and ability to travel domestically and internationally as required. Fluent in English (oral and written). Strong reservoir engineering background with excellent analytical and simulation skills (e.g. Petex suite, Tnav, Eclipse, Spotfire, OFM). Proven competency in strategic development planning, maturation and execution of capital projects. Knowledge of operations and well planning & execution is desired. Track record in working in multi-disciplinary teams. Chemical EOR experience desirable. We are committed to building a diverse organisation with a variety of backgrounds, skills and views. The more inclusive we are, the better we are. We recognise you may not fulfil every criteria but if you meet most of them, please apply.