Principal Civil & Structural Engineer

About the Opportunity

At Amentum we are recruiting a Principal Civil and Structural Engineer to join our Energy business. The role supports UK nuclear fleet transformation and new small and advanced modular reactor developers across a wide range of projects, including licensing, new build, generation, life extension, defueling, renewable energy and high‑energy industrial projects.

Your role will be to manage and deliver civil and structural engineering solutions within time, cost and quality constraints on projects of varying sizes. You will work alongside Engineering Managers and Operations Managers to deliver maximum value and build effective relationships with internal and external stakeholders.

This role is based at one of our Energy offices (London, Newcastle, Warrington, Bristol, Gloucester or Knutsford) and offers flexible working patterns.

• Act as the Responsible Engineer and Technical Authority on major energy projects of varying sizes.
• Lead the definition of civil and structural engineering strategies, standards and best practices across projects.
• Lead project delivery teams across the project lifecycle from bid generation, through concept and detailed design development to construction.
• Take accountability for delivery of complex civil and structural engineering packages to cost, time and quality.
• Provide technical leadership, governance and quality assurance for safety‑critical systems.
• Demonstrate knowledge of the practical aspects of implementing engineering designs and understand the use of standards and compliance with regulatory requirements.
• Oversee, verify and lead preparation of safety case inputs such as Safety Functional Requirements (SFRs), Structural Design Method Statements (SDMSs) and Design Substantiation Reports (DSR).
• Oversee, verify and lead preparation of Interpretive Reports, Basis of Design, Analysis Reports, Calculations, CDM documentation, Material Specifications, Scopes of Work and Technical Reports.
• Engage with clients, regulators and industry bodies at a senior level, building and maintaining valuable relationships.
• Mentor and develop the engineering capability of the wider civil and structural engineering team.
• Drive innovation, digital tools and continuous improvement in engineering delivery.
• Support business development, proposals and client relationship management; build and manage client relationships and leverage those relationships to deliver continued opportunities and new business leads.

• MEng, MSc, BEng or BSc or equivalent in civil engineering or another relevant discipline.
• Chartered Engineer status with a relevant professional body.
• Previous team leadership, line management, technical lead or Responsible Engineer experience.
• Extensive experience in civil and structural design and leadership within the nuclear sector or highly regulated environments.
• Deep knowledge of nuclear safety, regulation and quality assurance processes.
• Knowledge of civil engineering principles, design tools and relevant guidelines, standards and practices (particularly American standards ACI, ASCE and AISC).
• Experience using finite element modelling software and associated post‑processing software, with experience in validation and verification of modelling tools and their outputs.
• Good knowledge of health and safety legislation and good practice.
• Understanding of the use of design tools within a BIM environment.
• UK Nuclear Licensing and Generic Design Assessment process experience is desirable.
• Excellent communication, leadership and client engagement skills.
• Experience in shaping and influencing technical strategy, standards and governance.
• Recognised as a subject matter expert within civil and structural engineering and committed to Continuous Professional Development.

• 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.

Amentum is a proud Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy, age, ancestry, 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.

We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.