Senior Reservoir Engineer

Senior Reservoir Engineer Corporate Headquarters - Denver, CO 80202 Start Date 06/03/2026 End Date 06/10/2026 Apply Overview Salary Range $135,000.00 - $180,000.00 Salary Position Type Full Time Job Shift Day Education Level 4 Year Degree Travel Percentage Negligible Category Engineering Apply Description POSITION SUMMARY The Senior Reservoir Engineer supports Jonah Energy’s development to optimize the assets through determining the location and amount of oil and gas reservoirs and optimizing their development and production to obtain a high economic recovery. The Sr. Reservoir Engineer may also perform exploration and A&D evaluations and assists in the corporate reserves and planning processes. This position collaborates closely with the broader development and operations teams and reports to the Vice President of Reservoir Engineering & Geology in our Denver office. ESSENTIAL RESPONSIBILITIES Drive innovation to extract value from co nventional and unconventional assets. Manage and coordinate projects (reserves/resources, technical studies), including taking a lead role in projects involving complex situations and ensuring that timelines are met, and issues are resolved. Develop/organize/contribute to internal efforts on data analytics, efficiency and quality control improvements, benchmarking, research, new application development. Work with personnel to implement these solutions. Evaluate petroleum reservoir fluid properties, apply the principles of fluid flow through porous media, analyze data pertaining to rock properties, and estimate the recovery of hydrocarbons from subsurface reservoirs. Utilize multiple methods for evaluation, including numerical modeling, analytical modeling, performance analysis through decline-curve analysis, rate transient analysis, material balance, and other methods of analysis. Understanding reservoir drive mechanisms, fluid characterization, fluid flow through porous media, and volumetric behavior of reservoirs and in-situ fluids is essential. Recent experience performing rate transient analysis is desirable. Perform economic modeling and analysis of future production streams through cash flow analysis and the time value of money. Conduct quality control checks, verify accuracy of cash flows, and perform quality control of detailed production, pricing, and cost inputs. Prepare presentations and formal written reports. Guide development decisions for an active drilling program by addressing and incorporating input from the organization to prepare project justification in a timely fashion. Identify and provide technical evaluation of development, exploration and base production projects to properly quantify their economic and strategic value. Perform, review, and supervise reservoir studies to track reservoir performance as compared to predicted performance - develop optimal schedules and forecasts of individual reservoir deliverability. Collaborate with the development and operations teams to evaluate and optimize recovery efficiency, completion design and well spacing. Perform evaluations for business development and acquisition opportunities. Assist in generation and review of inputs and outputs on third party and internal reserve reports. Collaborate with third party consultants to provide strategic guidance and technical support on regulatory applications (WOGCC, BLM, etc.). Provides mentorship to staff throughout the development and operations teams. Maintain respectful and productive working relationships within and across all work groups, ensuring effective collaboration and cooperation. Create a work environment that is consistent with the company’s Purpose, Vision & Core Values. OTHER DUTIES Updates job knowledge by participating in educational opportunities; reading professional publications; maintaining personal networks; participating in professional organizations. Travels to the field and to evaluate business development opportunities on an as-needed basis. Perform other duties and projects as assigned to support the success of the department and company SUPERVISORY RESPONSIBILITIES None Qualifications REQUIRED KNOWLEDGE, SKILLS, AND ABILITIES Advanced reservoir engineering fundamentals: reserves, type curves, rate transient analysis material balance, volumetrics, petrophysics, statistical analysis, risk and uncertainty analysis, etc. Strong understanding of economic analysis and reserve estimation. Comfortable working with large amounts of data and at times ambiguous data. Advanced proficiency in Aries, ComboCurve, Enverus Prism, Excel, Access, Spotfire, and an RTA Software (Whitson+ or Fekete Harmony equivalent). Intermediate or better with SQL programming and VBA programming. Familiarity with geologic software (Petra, Geographix, etc.). Experience with asset evaluations for acquisition opportunities. Knowledgeable about SEC reserve reporting standards. Familiarity with regulatory applications requirements and associated technical support. Collaborate with broad range of disciplines to execute on plan. Self-starter with the ability to work in a lean team and with varying degrees of direction; works well under pressure and with a variety of projects. Strong analytical skills with attention to detail and ability to work efficiency with large datasets. Strong business and financial acumen. Excellent verbal and written communication skills; effectively converse with all levels of the company, customers, business associates Professional integrity and accountability Work in fast-paced, cross-functional, collaborative environment REQUIRED EDUCATION AND QUALIFICATIONS Bachelor of Science degree in Engineering required. 10 years of experience with at least 7 years of reservoir engineering experience in the Oil and Gas industry, including at least 3 years in A&D evaluations. Experience with projecting estimates of future production from reservoirs and evaluating the value of such streams. REQUIRED CERTIFICATIONS AND LICENSES None PREFERRED KNOWLEDGE, SKILLS, AND ABILITIES Experience in programming, data analytics, and data pipeline engineering PREFERRED EDUCATION AND QUALIFICATIONS BS Engineering, Petroleum, Chemical, Mechanical, or Electrical Direct experience with Eagle Ford and Austin Chalk formations or experience with alternate oil resource plays. PREFERRED CERTIFICATIONS AND LICENSES PE – Professional Engineer POSITION SCOPE & IMPACT Individual contributor with impact on department and companywide asset development WORK ENVIRONMENT Work in a climate-controlled office and routinely use standard office equipment TRAVEL Up to 5%, as business requires PHYSICAL REQUIREMENTS Physical Requirements % of Work Time Remain in a seated position 90% Speak and hear clearly 100% Lift office products and supplies, up to 20lbs. 5% Stoop, kneel, bend and reach 20% Dexterity to write and manipulate keyboard and mouse 100% Jonah Energy determines the salary level for potential new employees by considering a candidate's experience, skills, and education, along with the position's work location, external market conditions and internal pay equity. This position is eligible for a 9/80 hybrid work schedule after 30-days of employment. Work is performed at office on Tuesdays through Thursdays, remote work on Mondays and Fridays.  We offer a comprehensive benefit package including generous PTO, 401k match and discretionary profit sharing, tuition assistance, professional development, and eligibility for short- and long-term incentive program.  Additionally, eligible employees may enroll in health, dental, vision and life insurance on their first day of employment and elect from several voluntary group benefits.  As an employee you have the opportunity to make a difference in a company where your position is critical to project success! It has been and will continue to be the policy of Jonah Energy LLC not to discriminate against any employee or applicant for employment because of their race, color, religion, national origin, age, sex, sexual orientation, gender identity, gender expression, veteran status, disability, or other legally protected status.  Employment is contingent upon successful completion of pre-employment screenings.