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Assistant Reservoir Engineer Jobs (NOW HIRING)

Alaska-Santos

Senior Geoscientist

Anchorage, AK · On-site

... and reservoir engineers to optimize well placement and design and perform post-well analysis to ... integration * Assist reservoir modelers to integrate new data and interpretation into the full ...

Alaska-Santos

Senior Geoscientist

Anchorage, AK · On-site

... and reservoir engineers to optimize well placement and design and perform post-well analysis to ... integration * Assist reservoir modelers to integrate new data and interpretation into the full ...

Alaska-Santos

Senior Geoscientist

Anchorage, AK · On-site

... and reservoir engineers to optimize well placement and design and perform post-well analysis to ... integration * Assist reservoir modelers to integrate new data and interpretation into the full ...

Hunt

Reservoir Engineering Technician II

Dallas, TX · On-site

We are currently seeking a Reservoir Engineering Technician II for the Dallas, TX office which ... * Assist with QA/QC of reserves database updates, internal economics and production reporting, and ...

Hunt

Reservoir Engineering Technician II

Dallas, TX

We are currently seeking a Reservoir Engineering Technician II for the Dallas, TX office which ... * Assist with QA/QC of reserves database updates, internal economics and production reporting, and ...

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How much do assistant reservoir engineer jobs pay per year?

As of Jul 4, 2026, the average yearly pay for assistant reservoir engineer in the United States is $88,754.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,500.00 and $104,500.00 per year, depending on experience, location, and employer.
What cities are hiring for Assistant Reservoir Engineer jobs? Cities with the most Assistant Reservoir Engineer job openings:
What are the most commonly searched types of Reservoir Engineer jobs? The most popular types of Reservoir Engineer jobs are:
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Assistant Reservoir Engineer jobs near you
Infographic showing various Assistant Reservoir Engineer job openings in the United States as of June 2026, with employment types broken down into 100% Part Time. Highlights an 95% Physical, 2% Hybrid, and 3% Remote job distribution, with an average salary of $88,754 per year, or $42.7 per hour.
Business Development Reservoir Engineering Technician

Business Development Reservoir Engineering Technician

INEOS

Denver, CO • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 24 days ago

INEOS rating

7.4

Company rating: 7.4 out of 10

Based on 22 frontline employees who took The Breakroom Quiz

56th of 91 rated chemical manufacturers

Job description

Excited to grow your career?
We value our talented employees, and whenever possible strive to help one of our associates grow professionally before recruiting new talent to our open positions. If you think the open position you see is right for you, we encourage you to apply!
Our people make all the difference in our success.
Compensation Grade
ONS-USD-34
Who We Are
INEOS Energy
INEOS Energy is the energy division of INEOS, we produce and trade oil, gas, power, liquefied natural gas (LNG) and carbon credits. Operating across the Danish and UK North Sea with offshore oil & gas assets and onshore assets in South Texas, US. This is supported by our investments and projects in low carbon technologies, which will help sustain our business through the energy transition.
The key focus for the US Onshore business is to acquire, explore and develop properties to produce natural gas, oil and NGL from underground reservoirs safely and efficiently. Key operated assets are in the Eagle Ford shale basin in South Texas. With over 2,000 well producing net 36kBOE per day.
Owning and operating producing US onshore assets is part of INEOS Energy's strategy to build a global integrated portfolio, fit for the energy transition, offering high-quality energy solutions to its customers.
About the job
Job Title: Business Development Reservoir Engineering Technician
Department: BD/Development
Summary of Position
We are seeking a high-caliber Business Development Reservoir Engineering Technician to join our Corporate Development team. In this role, you will be the backbone of our data evaluation pipeline for asset acquisitions, divestitures, and joint ventures. Your primary focus will be rapidly aggregating, scrubbing, and modeling large datasets from external data rooms and public repositories to identify commercial opportunities, evaluate competitor performance, and support strategic underwriting.
Primary Job Responsibilities
  • Database management
    • Build and maintain master ComboCurve databases converted from ARIES or PHDwin for target assets. Integrate well headers, production histories, and ownership records.
    • Manage, update, and maintain outside sourced VDR materials. Ensure data integrity for all A&D processes. Analyze large datasets to identify trends, anomalies, and insights that will improve decision-making.
    • Identify and mine reliable internal and external data sources for integration and analysis to support business development processes.
    • Inventory, load, and update ArcGIS and Kingdom platforms for business development processes.
    • Maintain and manage geological databases across multiple environments including Kingdom and Dnamoics with proprietary, Enverus, TGS, and IHS Global data.
  • Data Integration:
    • Extract, clean, and reconcile historical production, operating expenses, capital expenditures, and well header information from multiple sources
    • Design and deploy custom tools to streamline repetitive administrative tasks.
    • Build and maintain dynamic dashboards in TIBCO Spotfire to assist in gaining insights into operator best practices, capital efficiency opportunities, and asset optimization underperformance.
    • Utilize GIS tools to perform spatial data analysis and visualization & assist in Integrating GIS data with the reserves database to enhance data analytics capabilities.
  • Process Improvement & Optimization:
    • Utilize AI and process automation to create scalable solutions that enhance workflow efficiency, reduce errors, and minimize administrative costs.
    • Standardize and improve VDR analysis through automated data validation and quality assurance.
  • Collaboration & Communication:
    • Work closely with reservoir engineering and geoscience to ensure accurate representation of commercial and reservoir data.
    • Collaborate with Finance, Operations, Development and IT, GIS, and other departments to align data and technology solutions with business objectives.
    • Communicate complex technical solutions to non-technical stakeholders.

Education & Experience:
  • Bachelor's degree in engineering, mathematics, data science, data analytics, or a related field.
  • 5-10 years in reservoir technician experience in an E&P environment, with at least 1-2 years specifically dedicated to Corporate Development, M&A, or A&D workflows.
  • Proven experience with ComboCurve, ARIES, and PHDwin. SQL for report generation, data extraction, and database management.
  • Expert-level TIBCO Spotfire dashboard design. Advanced proficiency with Microsoft Excel (Power Query, VBA) and Microsoft Access.
  • Strong understanding of upstream oil and gas terminology and the transaction lifecycle.
  • Working knowledge of geospatial software programs such as ArcGIS or QGis
  • Exceptional speed and accuracy under tight transaction deadlines, a puzzle-solving mindset, and the ability to maintain absolute confidentiality.

Travel & Additional Requirements:
  • Work Location: Work is performed in office location
  • Schedule: 9/80
  • Travel not required to INEOS field locations.
  • INEOS is a drug free workplace. All offers to successful candidates will be subject to successful background check and drug screen.

Relocation:
Preferential treatment will be granted to candidates residing in the Denver metropolitan area.
Work Authorization:
INEOS USA Oil & Gas LLC is not currently sponsoring employment visas for this position.
Compensation & Benefits
Please note that the compensation information that follows is a good faith estimate for this position only and is provided pursuant to the Colorado Equal Pay for Equal Work Act (EPEWA) and Equal Pay Transparency Rules. It is estimated based on what a successful Colorado applicant might be paid. It assumes that the successful candidate will be in Colorado or perform the position from Colorado. Similar positions located outside of Colorado will not necessarily receive the same compensation.
Compensation:
The annual rate for this position generally ranges between $100,000 - $150,000 with an opportunity for a company-wide annual discretionary bonus, of up to 40% of eligible pay. This role, depending on skill level and experience, may also participate in the Long-Term Incentive Plan with annual awards, vesting over three years, ranging from 8-15% of stated annual target. These ranges are estimates, based on potential employee qualifications, operational needs, business performance to metrics, and other considerations permitted by law. The range may vary above and below the stated amounts, as permitted by Colorado Equal Pay Transparency Rule 4.1.2.
Benefits:
Benefits package includes healthcare, dental, and vision insurance for employees and eligible dependents. INEOS also offers several other wellness, financial, and work/lifestyle-specific benefits. 401(k) retirement has both an automatic 3% company contribution and a match of up to an additional 6% of eligible compensation. We offer generous paid time off that includes both sick and vacation which is based on and increases, with industry experience.

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