System Engineer

Amentum; Bristol; Hybrid; GBP 40,000 - 55,000; Full time

Job summary

A leading engineering firm in the UK seeks a System Engineer to support the design, replication, and commissioning of fluid systems for major infrastructure projects. Candidates should have a degree in Mechanical or Chemical Engineering and a minimum of 3 years of experience in process engineering. Strong skills in fluid systems design and effective communication are required to work collaboratively across remote teams. The role offers a competitive package and flexible working arrangements.

Benefits

Free single medical cover

Enhancements to parental leave pay

Reimbursement for professional development

Flexible working hours

Qualifications

• Minimum 3 years of experience in process engineering or relevant industry experience.
• Proficiency in fluid systems design, including hydraulic and mechanical sizing.
• Confidence in collaborating with remote teams across different locations.

Responsibilities

• Conduct replication analysis of existing fluid system designs.
• Provide technical input to procurement teams for specification development.
• Resolve complex technical issues in a proactive and timely manner.

Skills

Fluid systems design

Technical communication

Mechanical engineering

Process engineering

Project management

Education

Degree in Mechanical or Chemical Engineering

Job description

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll 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 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.

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

Energy Programmes is one of our newest Business Units and has been formed with the vision to support positive change and help shape the future of Nuclear Power. Our embedded teams are delivering support to Hinkley Point C (New build power station in the South West), Sizewell C (located in the South East), helping develop technologies in SMR (Small modular Reactor) capability and working towards building Poland's first Energy Power station.

Working in both client facing and internal roles we are delivering major programme and project management capabilities throughout the project lifecycle. We are driving to deliver safe, high quality and to time solutions by thinking innovatively and working collaboratively.

System Engineer – Role Overview

Amentum is currently recruiting a System Engineer who will support the design, replication, and commissioning of fluid systems across two major infrastructure projects. The role involves both technical analysis and coordination across disciplines to ensure system integrity and readiness. Key responsibilities will be:

• Conduct replication analysis of existing fluid system designs.
• Review and verify input data, requirements, and lessons learned from similar projects.
• Establish processes for replicating system design documentation, including process descriptions, mechanical and instrumentation/control (I&C) sizing.
• Where adaptation is needed, perform component sizing (e.g., pumps, pipework, tanks) and thermal-hydraulic modelling using internal or commercial tools.
• Provide technical input to procurement teams for specification development and supplier engagement.
• Update configuration tools and documentation to reflect design modifications.
• Manage and assess modification requests for system applicability.
• Develop and present multidisciplinary technical solutions that support design stability.
• Resolve complex technical issues in a proactive and timely manner.

Commissioning Support

• Participate in project reviews and meetings (e.g., kick‑off, maturity, gate reviews).
• Produce updated documentation and redlines as required.
• Provide system‑level inputs to support commissioning documentation and sequencing.

Qualifications

• Degree in Mechanical or Chemical Engineering (or equivalent).
• Minimum 3 years of experience in process engineering or relevant industry experience.
• Proficiency in fluid systems design, including process, hydraulic, mechanical sizing, instrumentation and control; basic understanding of electrical systems.
• Strong ability to manage workload and produce high-quality documentation within deadlines.
• Clear and effective communication skills in English, both written and verbal.
• Confidence in collaborating with remote teams across different locations.

Our Culture

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration.

We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.

When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

Equal Opportunity Statement

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, 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.