Share this Job

Location Name: Denver, CO 
Job/Requisition ID: 68702
Location Address: 1515 Arapahoe St Twr1 Ste 1600, Denver, CO, United States (US), 80202
Education Level: Bachelor's Required 
Relevant Experience Level: ​​​​​​​Mid Career (4+ Years)
Employee Group: Regular - Full Time
Employee Subgroup: Salaried Exempt



The HES&S Professional serves as an essential core team member of the Sustainability team. The role supports the systems and processes established for continuity and growth of the business through support of MPLX’s sustainability strategy, metrics, reporting and governance. The HES&S Professional works closely with the environmental, operations and maintenance departments to assist with the preparation and submittal of greenhouse gas and emissions inventory reports. This role will support the collection, review, and submittal of data into the Asset and Compliance Tracking System (ACTs). As needed, the role will also support other sustainability initiatives or reporting efforts.


  • Gather & Analyze Environmental Data
    • Works with internal environmental, operations maintenance and other functional teams to gather and analyze monthly environmental data and records for completeness and accuracy.
    • Maintains and performs air emissions calculations using spreadsheets and software programs including ACTS, GRI-GLYCalc, E&P Tanks, and AspenTech HYSYS.
    • Analyze data for trends, evaluate information and monitor the impact of new and ongoing projects on GHG emissions.
    • Provides support for the implementation and maintenance of the environmental software system, ACTS.
  • Recordkeeping & Reporting
    • Assists team in preparation and submission of timely and accurate air emissions calculations and reports required for state emissions inventory programs and greenhouse gas reporting under 40 CFR Part 98 Subparts W, NN and CC.
    • Provide support with data requests from local, state and federal agency inspections.
    • Interprets environmental regulations and guidance and applies that knowledge to environmental recordkeeping and reporting efforts.
  • Other Duties
    • Supports other sustainability initiatives such as ESG reporting for SASB/GRI/TCFD/IPIECA, as needed.
    • Supports G&Ps Focus on Methane program tracking and reporting initiative, as needed.
    • Communicates environmental compliance requirements to MPLX personnel.
    • Participates in Corporate Environmental, Health & Safety audit program.
    • Supports development of environmental training related to GHG and Emission Inventory reporting.
    • Assists Sustainability and Environmental teams with special projects as needed.


Key Knowledge, Skills and Abilities:

    • Knowledge of local, state, and federal environmental regulatory standards and compliance practices as they relate to air emissions; knowledge of EPA Federal Greenhouse Gas Reporting Program and State (PA, OH, WV, NM, TX, OK, WY, UT, ND, CO & MT) Emissions Inventory preferred.
    • Knowledge on ESG midstream oil and gas issues preferred.  
    • Experience with air emissions calculations preferred.
    • Flexible to work in an evolving regulatory environment.
    • Strong attention to detail with analytical, problem solving, and critical thinking skills.
    • Motivated self-starter with strong sense of integrity.
    • Ability to manage multiple tasks and deadlines.
    • Excellent interpersonal skills with strong ability to work collaboratively within a team and across teams.
    • Experience of the midstream oil and gas business along with a history of successfully working on environmental compliance issues.
    • Excellent verbal and written communication skills.  Job will require report writing and public speaking engagements.
    • Excellent computer skills 




Degree: Bachelor’s degree from four-year College or University. Required.

Major: Environmental Sciences, Engineering, Sustainability

Computer Proficiencies: Excel, MS Word, PowerPoint and SharePoint.

Work Experience:  4+ years of relevant work experience required


About Marathon Petroleum Corporation


Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream energy company headquartered in Findlay, Ohio. The company operates the nation's largest refining system. MPC's marketing system includes branded locations across the United States, including Marathon brand retail outlets. MPC also owns the general partner and majority limited partner interest in MPLX LP, a midstream company that owns and operates gathering, processing, and fractionation assets, as well as crude oil and light product transportation and logistics infrastructure.

Travel Expected: Up to 10%


Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship  or any other status protected by applicable federal, state, or local laws.  If you would like more information about your EEO rights as an applicant, click here.

If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at Please specify the reasonable accommodation you are requesting, along with the job posting number in which you may be interested. A Human Resources representative will review your request and contact you to discuss a reasonable accommodation.

Equal Opportunity Employer: Veteran / Disability

Marathon Petroleum Company LP participates in the E-Verify program in some states in which it operates (including AL, AZ, GA, MS, NC, SC, TN, and UT). For more information before proceeding, please see details in English or Spanish. Right to Work Statement English or Spanish.

To view benefit information for Marathon Petroleum Corporation please visit

Nearest Major Market: Denver

Job Segment: Engineer, Developer, Sharepoint, Engineering, Technology