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ExxonMobil

Produces oil, gas, fuels and chemical materials

Postdoctoral Research Associate Intern

InternshipUpdated on 10/23/2026
No salary listed
PhD
Spring, TX, USA
In PersonEmployees are located at the main corporate office in Spring, Texas.
Academic & Institutional ResearchEnvironmental Sciences

About the job

Requirements
  • A Ph.D. in Hydrology, Hydrogeology, Ecohydrology, Environmental Science, Rangeland Ecology, or a related field.
  • Demonstrated experience with study design and experimental frameworks, data quality assurance and quality control, and data management.
  • Experience with process-based hydrologic or hydrogeologic models such as SWAT+, APEX, or MODFLOW.
  • Strong quantitative and statistical skills using R, Python, or equivalent tools.
  • Expertise in geographic information systems and spatial analysis using ArcGIS, QGIS, or Google Earth Engine.
  • A track record of peer-reviewed publications.
  • Strong written and verbal communication, coordination, and collaboration skills.
  • Ability to work independently while collaborating effectively within an interdisciplinary team.
Responsibilities
  • Support and lead applied research projects evaluating water management’s role in ecosystem resilience, hydrologic function, and biodiversity across ecosystems.
  • Provide leadership in refining study design and aligning hydrologic or hydrogeologic modeling, field monitoring networks, and ecological response metrics.
  • Develop and standardize sampling frameworks and experimental design across treatment and control areas.
  • Ensure consistency between field data collection, modeling assumptions, and reporting outputs.
  • Support development of monitoring plans and adaptive management frameworks.
  • Ensure implementation of quality assurance and quality control protocols across hydrology, hydrogeology, vegetation, and wildlife datasets.
  • Establish data validation workflows, metadata standards, and documentation practices.
  • Perform data integrity audits and cross-validation among field observations, groundwater data, remote sensing, and model outputs.
  • Ensure compliance with scientific best practices and regulatory expectations.
  • Oversee implementation, calibration, and validation of water models such as SWAT+ and MODFLOW.
  • Ensure appropriate linkage among model parameterization, field data inputs, groundwater systems, and observed ecological responses.
  • Review and refine soil, aquifer, vegetation, and hydrologic parameter assumptions and scenario design for application.
  • Coordinate teams to ensure aligned and defensible field-monitoring approaches and provide technical guidance on study design.
  • Ensure field programs generate data suitable for model calibration and validation, statistical inference, and trend detection.
  • Identify and resolve data gaps, inconsistencies, or methodological risks.
  • Oversee integration of geographic information systems, remote sensing, and model datasets, including watershed and aquifer delineation, LiDAR, drone imagery, and satellite products.
  • Ensure spatial consistency across datasets and time series and develop integrated spatial products linking hydrologic and hydrogeological processes with ecological outcomes.
  • Lead or co-author peer-reviewed publications and technical reports, ensuring reporting reflects high-confidence, quality-assurance-and-quality-control-vetted data and analyses.
  • Develop decision-support tools and guidance covering application thresholds, risk mitigation strategies for salinity, erosion, and water quality, and groundwater impacts.
  • Translate scientific outputs into actionable recommendations for land management, water reuse implementation, and regulatory and stakeholder engagement.
  • Collaborate with ExxonMobil Biomedical Sciences scientific staff, third-party collaborators, information technology resources, and global operations.
  • Grow ecology, hydrology, and hydrogeology capability at ExxonMobil.
  • Develop tools to assist in evaluating complex ecological and hydrogeological systems.
  • Incorporate optimization elements to automate biodiversity monitoring.
Desired Qualifications
  • Experience overseeing multidisciplinary field programs.
  • Background in water quality, salinity, nutrient transport systems, or groundwater flow systems.
  • Experience integrating remote sensing, including LiDAR, unmanned aerial vehicles, and satellite data.
  • Experience with surface-groundwater interaction studies and aquifer characterization.
  • Familiarity with regulatory or applied monitoring frameworks.
  • Experience working with industry-sponsored or applied research programs.
  • Ability to bridge science, operations, and decision-making.

About the company

ExxonMobil produces oil and natural gas and manufactures fuels, lubricants, and chemicals for transport operators, industrial customers, and consumers around the world. Its businesses span resource exploration and production, refineries that turn crude oil into fuels, and plants that make plastics and other chemical materials. The company sells products through wholesale supply agreements and the Exxon, Esso, and Mobil brands, including motor oils for vehicles and machinery. It also sells services that capture, transport, and store industrial carbon dioxide underground. The merged company formed in 1999 from Exxon and Mobil, with roots in earlier oil businesses, and is headquartered in Spring, Texas.

Company Size

10,001+

Company Stage

N/A

Total Funding

N/A

Headquarters

Irving, Texas

Founded

1999

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Simplify's Take

What believers are saying

  • Investment has cash backing: ExxonMobil generated $23.6 billion of operating cash flow in the June 2026 quarter.
  • ExxonMobil is commercializing carbon storage: its second Louisiana operation started in February 2026.
  • Eligible U.S. employees build retirement savings: ExxonMobil contributes 7% of salary when workers contribute 6%.

What critics are saying

  • Oil prices drive ExxonMobil's results: higher crude prices added $4.2 billion to upstream earnings in the June 2026 quarter.
  • U.S. starting vacation is limited: ExxonMobil lists a two-week base allowance that increases with service.
  • ExxonMobil's workforce contracted: February 2026 reporting showed regular employees fell from 61,000 to 58,000 during 2025.

What makes ExxonMobil unique

  • ExxonMobil controls a vast shale footprint: its combined Permian holdings span more than 1.4 million net acres.
  • ExxonMobil directs Guyana's major offshore field: its affiliate operates Stabroek with a 45% stake.
  • ExxonMobil owns carbon-storage infrastructure: its U.S. carbon dioxide pipeline network stretches more than 1,300 miles.

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Benefits

  • Health Insurance
  • Life Insurance
  • 401(k) Retirement Plan
  • Competitive compensation
  • Medical plans
  • Maternity Leave
  • Retirement benefits
  • Annual vacations & holidays
  • Day care assistance program
  • Training and development program
  • Tuition assistance program
  • Workplace flexibility policy

Company News

Yahoo Finance
Oct 22nd, 2026
Exxon recoups $55B Guyana investment, turning the project into a free cash flow engine

Exxon Mobil says its Guyana project has fully paid back its investment, a shift management called "very much an inflection into free cash flow." The company said on a July 31, 2026 call that it recovered its $55 billion investment and all operating costs. Under the contract, up to 75% of production can go toward cost recovery. The rest is shared 50-50 with Guyana's government. Gross output was about 900,000 barrels a day in the second quarter. Exxon's free cash flow hit $17.0 billion in the quarter, up from $5.27 billion a year earlier. Management expects Guyana's free cash flow in 2030 to be twice the 2025 level. Higher oil prices may have boosted the quarter, and Exxon temporarily lost about 10% of upstream production to the Middle East conflict. The fifth floating production ship, Errea Wittu, is on track to start up by the end of 2026.

Yahoo Finance
Oct 21st, 2026
Exxon stock up 65.8% in a year: key dates to watch, from Q3 results to Guyana's fifth vessel

Exxon Mobil (XOM) shares returned 65.8% over the past year, against 17.4% for the S&P 500, helped by tight markets. Several events could move the stock over the next six months. The company reports third-quarter 2026 results on October 30, 2026. Second-quarter net income more than doubled to $14.5 billion from $7.08 billion a year earlier, and management expects refining margins to stay very high. Errea Wittu, its fifth production vessel in Guyana, is due to start up by the end of 2026. Exxon also plans investment decisions on projects in Mozambique and Papua New Guinea before year-end. The Middle East conflict cost Exxon about 10% of upstream output in the second quarter. Windfall taxes on European refining are a risk.

Yahoo Finance
Oct 20th, 2026
Cash beats debt: stronger balance sheets sit closer to 52-week highs in all five pairs

Companies with more cash than debt are holding up better as inflation hits 3.7%, the 10-year Treasury yields about 5.1%, and US oil tops $100 a barrel. An analysis of five industry pairs found the stronger company sat closer to its 52-week high in every case. In four, debt made the difference. Microsoft, with $20 billion of net cash, is 1.8% below its high. CoreWeave, with $46 billion of net debt, is 56.3% below. Exxon is 0.4% below its high, against 35.6% for American Airlines. Nucor trails its high by 4.9%, while Celanese trails by 30.8%. Alphabet is down 14.4%, while Charter, with $96 billion of net debt, is down 57.0%. Costco and Nike are the exception: Nike's gap stems from falling sales, not debt.

Yahoo Finance
Oct 17th, 2026
Diesel at $6.20 a gallon: Marathon leads five energy stocks set to gain

US diesel prices averaged $6.199 a gallon for the week of October 5, the US Energy Information Administration (EIA) said. That is down from a 2026 peak of $6.529 in late September but more than $2.50 above a year ago. A disruption to Strait of Hormuz shipping earlier this year cut global refined fuel exports. Refiners gain most. Marathon Petroleum's refining margin doubled to $36.33 a barrel in the second quarter, from $17.58 a year earlier. Integrated majors also benefit. Chevron's downstream earnings rose to $4.9 billion from $737 million, while ExxonMobil's refining and fuels earnings reached $4.1 billion, nearly double a year earlier. Pipeline firms Energy Transfer and Enterprise Products Partners earn mostly fees, so they get little direct lift. The EIA expects prices to stay high through October before easing.

Yahoo Finance
Oct 16th, 2026
Exxon shares rise 2% as refining margins add $4.5B to Q3 estimate

Exxon Mobil shares rose 2% to about $178.04 on Friday after the company said stronger refining margins could add about $4.5 billion to third-quarter results, compared with the prior quarter. In a filing with the Securities and Exchange Commission, Exxon estimated a net $4.4 billion boost from better product margins. That was partly offset by a $1.3 billion hit from lower oil and liquids prices. The company said it saw no volume losses tied to Middle East events. Goldman Sachs analyst Neil Mehta said the filing implied earnings per share near $4.10. That is above the FactSet consensus of about $3.87, but below Goldman's own estimate of $4.33. Exxon will report full results on October 30. The stock has gained 48% this year.