Mid-Level Process Engineer Description: As a mid-level process engineer, you will support the design, analysis, and documentation of nuclear and chemical process systems, working closely with multidisciplinary engineering teams during project development and execution of DOE and nuclear facility projects. This role requires hands‑on experience performing and formally documenting process engineering calculations, developing process equipment specifications, and supporting design activities in highly regulated nuclear environments. Key Responsibilities: Perform and document process engineering calculations in support of nuclear and chemical process systems Support process design development during conceptual, preliminary, and detailed design phases Develop and review: Engineering calculations Process flow diagrams (PFDs) Piping and instrumentation diagrams (P&IDs) Process equipment specifications and data sheets Apply applicable nuclear, chemical, and safety requirements to process designs Interface with mechanical, electrical, I&C, safety, and operations teams to ensure integrated design solutions Support design reviews, technical evaluations, and configuration control activities Prepare and maintain formal engineering documentation, calculations, and technical reports in accordance with quality and regulatory requirements Provide technical support during procurement, construction, startup, or readiness activities as required Mentor or provide technical guidance to junior engineers and designers when appropriate Basic Qualifications: B.S. Chemical Engineering from an ABET accredited engineering program 5+ years in in process engineering roles within industrial, nuclear, or government facilities U.S. Citizenship required Experience performing and documenting process engineering calculations Familiarity with process equipment specification and system design Experience working within regulated environments and structured engineering procedures Preferred Qualifications: In addition to the Basic Qualifications the ideal candidate might also have: Prior nuclear, DOE, or high‑hazard facility design experience Experience with nuclear material or uranium processing systems Experience working under a formal quality program (ISO 9001, NQA 1) Experience serving in a project engineering or technical lead role Experience coordinating or reviewing the work of other engineers or designers Professional Engineer (PE) license, or ability to obtain Strong analytical, problem‑solving, and communication skills Master’s degree in Engineering from an ABET‑accredited institution Self‑motivated, detail‑oriented, and team‑focused professional Work Environment: Primarily office-based work in a secure engineering environment  Amentum office location is preferred; hybrid or remote work may be available by prior agreement based on role and project requirements Occasional exposure to industrial facilities, which may include elevated noise levels, hazardous materials, or controlled areas Site visits may be required Physical Requirements:  Ability to sit or stand for extended periods Ability to lift up to 35 lbs occasionally Vision correctable to 20/20 Ability to read and use computer‑aided design software effectively Appropriate PPE and training will be provided as required Compliance & Eligibility Requirements: U.S. Citizenship required (no dual citizenship) Valid driver's license is required Ability to obtain and maintain a security clearance Ability to pass pre-employment background investigation and drug screening Willingness to work overtime or outside normal hours as needed Professional appearance appropriate for a customer‑facing engineering environment Travel required: less than 10% Compensation Details: $90,000 - $150,000 The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include: Health, dental, and vision insurance Paid time off and holidays Retirement benefits (including 401(k) matching) Educational reimbursement Parental leave Employee stock purchase plan Tax-saving options Disability and life insurance Pet insurance Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits. Original Posting: 10/21/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs. Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters. Welcome back! We encourage you to check on the status of your current job applications with us. You can also search for a list of our current job openings and see if there are any new positions that might be a good fit for you. Thank you for continued interest in employment with Amentum. For more than 100 years, Amentum has tackled the world’s toughest challenges to deliver agile and steadfast solutions to the U.S. government and its allies. With more than 50,000 employees on all seven continents and in more than 60 countries, Amentum delivers a broad range of operational support services to meet the critical needs of our clients. Our headquarters are in Chantilly, VA. Find us online at https://www.amentum.com/ If you need a reasonable accommodation for any part of the employment process, please complete our Accommodation Request. Requests for accommodation will be considered on a case-by-case basis. If you need assistance, please reach out to workdaycandidateaccounts@amentum.com EEO including Disability/Protected Veterans Labor Laws Posters Amentum has become aware of unauthorized individuals who are falsely using the Amentum name and /or logo in an attempt to solicit fees from potential job seekers. These deceptive and unauthorized individuals are soliciting money, promising placement in a position with Amentum. Please note any communication requesting any amount of money in exchange for employment with Amentum is fraudulent. These communications do not originate from Amentum and are not associated with the recruitment process. Amentum and its affiliates never charge candidates fees or payments of any kind in order to secure employment. As a precaution, we recommend you do not disclose personal or financial details to anyone as a response to an unsolicited email, social media, or dating website request. Amentum will never as ask for a placement fee or any other fee to expedite the hiring process. If you are contacted by anyone offering employment with Amentum, you should never be asked to pay a fee for recruiting. Amentum personnel will always send email from an identifiable corporate account (ending in @amentum.com) and never from a public email account like Yahoo!, Google, Gmail, or Hotmail. If you are contacted regarding a fraudulent employment proposal, we encourage you to alert your local law enforcement agency/police authority. To read more about Amentum’s commitment to ethics, please click here.

Mid-Level Process Engineer (Hybrid/Remote).

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