Full-Time

First Principles Custom Process Modeling Lead

Posted on 11/15/2025

ExxonMobil

ExxonMobil

10,001+ employees

Global fuel producer, distributor, stations network

No salary listed

Houston, TX, USA

In Person

Category
Process Engineering
Required Skills
Python
MATLAB
Requirements
  • PhD in Chemical Engineering, Mechanical Engineering, Applied Mathematics or related discipline with relevant thesis work
  • 10+ years of demonstrated industrial experience with developing and applying customized multi-scale models of process units (i.e. reacting and separation systems, electrochemical processes, membrane/adsorption separations, steady state/dynamic/cyclic etc.)
  • 10+ years of demonstrated industrial experience with building, solving, and optimizing robust kinetic models
  • 10+ years of demonstrated industrial experience with computational languages: gPROMS, MATLAB, Python, Aspen Custom Modeler or similar
  • Strong ability and interest to work on applications driven by abstract problems and develop creative out-of-the-box solutions
  • Effective interpersonal skills and leadership behaviors
  • Strong written and oral communication skills
  • Driven and self-motivated
Responsibilities
  • Develop and apply fit-for-purpose first principles/phenomenological models of novel, first of a kind process units to guide screening, development, and design of new process technologies across the business portfolio (Upstream, Product Solutions, Low Carbon Solutions)
  • Apply strong background in fundamentals-based modeling, particularly in the areas of reaction kinetics, heat and mass transfer in unit operations, and design for advanced reactors or separations
  • Work collaboratively in cross-discipline teams deploying models to guide/support experimentation (active materials development, lab and pilot-scale studies), process engineering, and equipment design
  • Formulate modeling framework from high-level research program objectives and guide a team of 1 to 3 modelers to deliver modeling goals
  • Apply deep knowledge and mentorship in topics related to first principles/phenomenological modeling, and reactor engineering within Research and broader ExxonMobil communities
  • Champion sustainment of differentiated modeling capabilities to deliver business value
Desired Qualifications
  • Process scale-up experience understanding the impact of scale on unit operations/commercial-scale embodiment/design
  • Experience with process simulation platforms (APSEN, HYSYS, Pro-II), hybrid modeling (i.e.: PINNs, AI/ML), Techno-economic Analysis
  • Lab and/or pilot scale experimentation

ExxonMobil operates a global network of Exxon and Mobil fuel stations offering gasoline, diesel, motor oil, and convenience-store items to individuals and commercial customers, and it also supplies wholesale fuels. Customers purchase fuel and related products at stations, use loyalty programs, and may add services like car washes; Alexa voice-pay options are available at many stations to speed transactions. The company differentiates itself with a vast, vertically integrated retail and wholesale network, broad loyalty programs, and technology-enabled payments. Its goal is to provide reliable energy and fuel access worldwide while delivering value through a wide range of services and payment options, maintaining leadership in the energy sector.

Company Size

10,001+

Company Stage

N/A

Total Funding

N/A

Headquarters

Irving, Texas

Founded

1866

Simplify Jobs

Simplify's Take

What believers are saying

  • Record Guyana production exceeds 900,000 barrels daily in Q1 2026.
  • Golden Pass LNG achieves first production in early 2026 amid rising demand.
  • Permian Basin targets 1.8 million oil-equivalent barrels daily by end-2026.

What critics are saying

  • Strait of Hormuz closure cuts Middle East output by 750,000 barrels daily.
  • Chevron's Guyana stake growth erodes Exxon's upstream market share.
  • Occidental's 9.3% margin diverts investors from Exxon's 7.5% operations.

What makes ExxonMobil unique

  • ExxonMobil formed in 1999 merger of Exxon and Mobil from Standard Oil legacy.
  • Vertically integrated across upstream, product solutions, and low carbon divisions.
  • Manages industry-leading portfolio as largest non-government energy producer.

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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

Relocation program

Transportation facility

Company News

Yahoo Finance
Apr 13th, 2026
Exxon Mobil faces $5B Q1 earnings drop despite commodity price gains

Exxon Mobil shares fell sharply on 8 April despite strong quarterly performance, as US-Iran ceasefire talks eliminated the energy sector's "war premium". Brent crude dropped to its lowest level in nearly a month as the two countries began negotiations in Pakistan. The company disclosed that disruptions in Qatar and the UAE would reduce first-quarter global oil-equivalent production by approximately 2% compared to the fourth quarter of 2025. These Middle Eastern assets represent about 12% of Exxon's total oil production. Preliminary earnings showed approximately $5 billion, or $1.20 per share, compared to adjusted earnings of $7.3 billion in the fourth quarter. Higher oil and gas prices could boost upstream earnings by roughly $1.4 billion, but downstream earnings face a $5.3 billion hit from timing effects related to derivatives and conflict-delayed cargoes.

Yahoo Finance
Apr 8th, 2026
ExxonMobil's $15M 10-K filing cost generates $130B-$162B value for shareholders

ExxonMobil has told the SEC that producing its annual Form 10-K requires roughly 20,000 employee hours over six weeks, characterising it as a "considerable undertaking" during the regulator's review of Regulation S-K. However, a return-on-investment analysis reveals the compliance cost is minimal compared to the value it generates. Including legal, executive and board costs, the total 10-K production cost is approximately $15 million — just 0.005% of ExxonMobil's $332 billion 2025 revenues and 0.052% of its $28.8 billion net income. The company spends more on capital investment in a single business day than on the entire compliance exercise. Meanwhile, academic research shows public listing commands a 20-25% premium over private companies. Applied to ExxonMobil's $648 billion market capitalisation, mandatory disclosure through the 10-K enables $130-162 billion in shareholder value — delivering a 19,000-to-1 return on compliance costs.

Yahoo Finance
Apr 8th, 2026
Exxon loses 6% of output as Iran war damages Qatar LNG trains, disrupts Gulf operations

Exxon Mobil disclosed approximately 6% of global output was lost during the first quarter due to the Iran conflict disrupting Persian Gulf operations, with half the impact from a liquefied natural gas facility in Qatar. Two LNG trains were damaged by Iranian missile strikes, with no clear repair timeline. The company expects a $3.7 billion sequential decline in its energy-products division, though management characterised the impact as temporary. Higher commodity prices are providing offset, with estimated gains of $2.1 billion from crude and $400 million from natural gas. Excluding timing effects, per-share earnings were higher quarter over quarter. The Persian Gulf typically accounts for one-fifth of Exxon's global output. The disruption follows recent growth projects and acquisitions that had lifted production by over 30% in the past three years.

Yahoo Finance
Apr 6th, 2026
Exxon Mobil stock soars 34% amid Iran war fears, then plunges 5% on peace talks

Exxon Mobil shares have surged 34% year-to-date as the Iran conflict pushed Brent crude above $100 per barrel, disrupting traffic through the Strait of Hormuz, which carries one-fifth of global oil and LNG flows. However, XOM stock plunged 5% on 1 April following reports the conflict may end soon, marking its worst single-day drop in over a year. The US International Development Finance Corporation launched a $20 billion maritime reinsurance programme to restore confidence and resume oil tanker traffic. Exxon's fourth-quarter earnings showed EPS of $1.71, beating estimates by 2%, with revenue of $82.31 billion. Net income reached $6.5 billion, though net income growth contracted 14% amid margin pressure. The company currently trades at a premium valuation with a trailing P/E of 23 times.

Yahoo Finance
Apr 6th, 2026
Defense contractors and oil companies profit from US-Iran war as gas prices surge past $4

As the US-Israel war with Iran enters its fifth week, American defence contractors and oil companies are reaping substantial profits whilst consumers face surging petrol prices approaching $4 per gallon. Defence stocks have surged, with Lockheed Martin jumping 25% this year after winning a contract to triple missile seeker production. Oil companies including ExxonMobil, Shell and Chevron have seen share prices rise over 20% as US crude nearly doubled from $65 to over $110 per barrel following Iran's blockade of the Strait of Hormuz. US oil producers could gain an additional $63 billion in profit, according to Rystad Energy. The situation mirrors 2022's Russia-Ukraine crisis, when global oil companies made $916 billion whilst American consumers faced record $5 per gallon petrol prices and 9% inflation.

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