Expression of Interest - Reservoir Engineer

Worley; Indonesia; On-site; IDR 600,000,000 - 1,000,000,000; Full time

Job summary

Worley is seeking an experienced reservoir engineer with substantial geothermal expertise to lead technical assurance across FEED, EPC/EPCM, drilling and commissioning. You will review models, run risk analysis, and collaborate with geoscience, drilling and operations teams to ensure disciplined delivery.

As a senior member of the team, you will mentor junior engineers, coordinate multidisciplinary interfaces, and support project managers with planning and risk management to deliver sustainable

Qualifications

• 8+ years of reservoir engineering experience, including geothermal delivery.
• Knowledge of geothermal resource classification, engineering standards, and HSE requirements.
• Experience reviewing EPC contractor submissions and due diligence.
• Strong writing, client-facing communication, and leadership skills.

Responsibilities

• Lead reservoir engineering in FEED, EPC/EPCM, drilling, testing and commissioning.Review contractor models, design deliverables and test programs for technical integrity.
• Monitor reservoir performance and update models with new data; advise on surveillance and optimization.
• Support tender development, scope definition, schedules and risk reviews.

Skills

Reservoir engineering

Geothermal

FEED/detailed design

Technical writing

Client communication

Education

Bachelor's degree in reservoir/petroleum/chemical/mechanical engineering

Postgraduate study desirable

Tools

Job description

About Us

Worley is a global company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning. Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

About Us

Worley is a global company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning. Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

Responsibilities Include

Technical Leadership

• Lead on the reservoir design basis, sustainable extraction limits, operating envelopes, make-up well requirements and production/injection strategies.
• Run scenario and sensitivity analyses to forecast pressure, enthalpy and mass output, and quantify uncertainty, depletion, cooling/breakthrough and long-term sustainability risks.
• Specify and interpret well testing, pressure-transient analysis, production logging and fluid sampling, and design reservoir surveillance and monitoring programmes.
• Define well targets, wellbore flow performance and deliverability inputs for drilling, steamfield and power-plant design, verifying consistency between reservoir forecasts, gathering systems and plant capacity.
• Work with geoscience, geochemistry and drilling colleagues to incorporate conceptual model updates into the reservoir model, and advise on reinjection strategy, scaling and chemistry constraints on production.
• Prepare and review technical specifications, calculations, models, reports, design criteria, philosophies and contractor/vendor submissions; support HAZID/HAZOP and technical risk reviews.

Project Delivery

• Act as the client's reservoir engineering focal point, providing independent technical assurance across FEED, EPC/EPCM, drilling, testing, commissioning and early operations.
• Review contractor models, assumptions, design deliverables, test programmes, deviations and change requests for technical integrity, compliance and value.
• Monitor reservoir and well performance against model forecasts and acceptance criteria, updating models as new data becomes available and recommending surveillance, mitigation, optimisation or make-up drilling actions.
• Support tender development and evaluation, scope definition, schedules, cost and risk reviews, technical due diligence, stage-gate decisions and lender/investor assurance.
• Coordinate multidisciplinary interfaces and communicate complex subsurface uncertainty clearly to clients, project teams and non-technical stakeholders; mentor junior engineers and promote quality and knowledge sharing.
• Support project managers with planning, resource forecasting and technical risk management.
• Contribute to commissioning planning and operational readiness activities where required.

What You'll Have

• Typically 8+ years of relevant reservoir engineering experience, including substantial geothermal experience and delivery in consulting, operator, EPC/EPCM, PMC or Owner's Engineer environments.
• Working knowledge of geothermal wells, drilling/completions, geochemistry, scaling/corrosion, steamfield systems and power-plant interfaces across high-, medium- or low-enthalpy developments.
• Experience producing and assuring FEED/detailed design deliverables and reviewing EPC contractor submissions; familiarity with technical due diligence, project risk and cost/schedule interfaces.
• Knowledge of applicable geothermal resource classification/reporting frameworks, engineering standards, HSE requirements and quality-management processes; professional registration or chartership is desirable.
• Strong technical writing, client-facing communication, leadership and multidisciplinary collaboration skills; willingness to travel and undertake field assignments as required.

Desirable

• Experience supporting bids and business development activities.
• A willingness to travel, stay away from home and undertake site based work

The successful candidate should demonstrate expertise in several of the following areas:

• geothermal reservoir simulation,
• material/energy balance,
• decline and uncertainty analysis,
• well-test interpretation,
• resource assessment and
• production/injection forecasting.

Qualifications

• Bachelor's degree in reservoir, petroleum, chemical or mechanical engineering, geoscience, or a closely related discipline;
• postgraduate study is desirable.

Personal Attributes

• Recognised technically with strong engineering judgement.
• Commercially aware and client focused.

Moving forward together

We want our people to be energized and empowered to drive sustainable impact. So, our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation. We're building a diverse, inclusive and respectful workplace. Creating a space where everyone feels they belong, can be themselves, and are heard. And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills, and supporting the transition of our workforce to become experts in today's low carbon energy infrastructure and technology. Whatever your ambition, there's a path for you here. And there's no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change.