Principal Process Engineer

Amentum; Stockton-on-Tees; On-site; GBP 45,000 - 70,000; Full time

Job summary

Amentum is seeking a Principal Process Engineer to support their Energy Business within the nuclear sector. You'll work on diverse projects ranging from new builds to life extensions, ensuring high compliance standards and delivering innovative solutions. This role emphasizes collaboration and professional growth, offering competitive benefits and a commitment to work-life balance.

Benefits

Free single medical cover

Enhanced parental leave pay

Professional development reimbursement

Qualifications

• Experience of front-end engineering design through full life cycle projects.
• Broad process understanding across varied clients and locations.
• Knowledge of civil nuclear plant systems and power plant technology.

Responsibilities

• Support various nuclear clients with process design and assurance.
• Lead small teams in multidisciplinary engineering tasks.
• Conduct HAZOP leadership and hazard identification studies.

Skills

Thermodynamics

Fluid Mechanics

Problem-Solving

Communication

Education

Degree qualified engineer in chemical engineering

Chartered (or working towards Chartership)

Job description

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Principal Process Engineer, Stockton-on-Tees

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Client:

Amentum

Location:

Stockton-on-Tees, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

d63686643d9c

Job Views:

7

Posted:

16.07.2025

Expiry Date:

30.08.2025

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Job Description:

Description - External

Amentum will inspire and empower you to deliver your best work so you can evolve, grow and succeed - today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the opportunity

Amentum is currently recruiting for a Principal Process Engineer to join our Energy Business. Engineering &Technical Solutions (ETS) is entering an exciting phase of opportunity by supporting our key client’s UK nuclear fleet through a business transformation, and by supporting new small modular reactor (SMR) developers. Our work is varied; covering New Build, Generation, Life Extension, and Defueling, and our capabilities are in demand across the nuclear sector. Amentum offer flexible working as well as hybrid working between a chosen base office and home. The candidate’s base office location will be Knutsford, Warrington, Stockton-on-Tees, Gloucester or Bristol with the possibility of being able to travel to other sites and Amentum offices, as required. You will report into the Process Engineering Lead and work closely with other engineers across the business.

The successful candidate must be highly motivated and proactive and looking to develop their technical capabilities and share their experience to develop other junior engineers. The Process Engineering post is for those with experience of working within the civil, nuclear or other highly regulated industries. Candidates will be familiar with the requirements of working in a regulated environment with providing ER support and as an Amentum employee, you will deliver work to high HSSE standards in compliance to HSSE regulations.

Key responsibilities:

You will support various and diverse nuclear clients, providing process design and assurance primarily in areas including:

Nuclear new build

Technical assurance of design reports prior to submission to clients or regulators

Design justification or assessment of new and existing process plants as part of safety reports.

Key discipline contributor in Feasibility and Optioneering Studies

Technical Lead or Discipline lead

HAZOP Leadership and Hazard Identification Studies.

Process Design Development

Leading small teams of multidisciplinary engineers, both internally and combined with partner companies, joint-ventures and client teams

Production and Checking of process deliverables including:

Process flow sheets

PFDs / P&IDs

Datasheets and underpinning calculations

Basis of Design

Process Descriptions etc.

Here’s What You’ll Need:

Degree qualified engineer in chemical engineering (or accomplished engineer through apprentice route with relevant expertise)

Chartered (or working towards Chartership)

Experience of front-end engineering design through to full life cycle project requirements

To display a broad Process understanding in order to be able to undertake different projects across varied clients/locations

Knowledge of Civil nuclear plant systems, Conventional power plant technology, structures and component and associated design and assessment guidelines is a distinct advantage

Desired Skills / Expertise:

Thermodynamics

Fluid flow / Fluid Mechanics

Steam System Design

Equipment sizing including, Pumps, Heat Exchangers, Pressure Vessels etc.

Solids handling

Self-motivated, with an ability and desire to work collaboratively with other organisations to create new opportunities

Ability to think innovatively and solve complex problems

Ability to communicate well, both verbally and in writing

Our Culture

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centered on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.