Mechanical Calculations Engineer

PAE Government Services Inc.; Bridgwater; Hybrid; GBP 50,000 - 75,000; Full time

Benefits offered by this job

Free medical cover

Digital GP service

Enhanced parental leave pay

Professional development reimbursement

Job summary

Amentum is recruiting a Mechanical Calculations Engineer to support field design activities for piping discipline on the HPC project. You will manage interfaces across disciplines, resolve piping issues during on-site installation, and ensure compliance with nuclear standards and project milestones.

We seek candidates with strong analytical skills, 3+ years in mechanical calculation, and familiarity with EUROCODE/ASME/RCC-M.

Qualifications

• Master’s degree in mechanical engineering or science.
• Minimum 3 years’ experience in mechanical calculation, ideally in nuclear industry.
• Knowledge of EUROCODE, ASME and RCC-M; experience with 2D/3D design and calculation software.

Responsibilities

• Gather input data and prepare loading description reports for piping systems and supports.
• Perform piping flexibility calculations, piping support calculations, and FEA using PipeStress, RSTAB and ANSYS.
• Conduct dynamic analysis of nuclear structures and components under seismic and thermal conditions.
• Design and calculate anchorages, welds and bolted connections for piping supports.
• Collaborate with CAD designers to assist for accurate design drawings.
• Prepare and review technical documentation to support design and installation activities.

Education

Master’s in science, Mechanical engineering

Tools

PDMS

NavisWorks

PIPESTRESS

RSTAB

ANSYS APDL

WORKBENCH

Job description

About Amentum

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.

The Opportunity

We employ the UK's most experienced and skilled technical services professionals and has grown to over 8,000 people in locations across the UK - we provide the resources to turn great ideas into reality, and we offer capable and committed individuals the opportunity to shape their careers how they wish. Hinkley Point C (HPC) is the first new nuclear power station to be built in the UK in over 20 years, HPCs two EPR reactors will be capable of generating 3.26GW of secure, low carbon electricity for 60 years, enough electricity to power around 6 million homes. In addition to the projects 'clean energy' benefits, HPC will create thousands of jobs and bring lasting benefits to the UK economy. Amentum are currently recruiting a Mechanical Calculations Engineer who will focus on supporting field design activities for the piping discipline within the HPC project. The role involves managing interfaces with multiple disciplines and resolving piping engineering issues encountered during on-site installation of pipework and associated supports. The engineer will ensure compliance with nuclear industry standards and project milestones while maintaining EPR-E procedures.

Key Responsibilities

• Gather input data, analyse/update hypothesis notes, and prepare detailed loading description reports for piping systems and supports.
• Perform piping flexibility calculations, piping support calculations, and finite element analysis (FEA) to address installation and operational issues using PipeStress, RSTAB & ANSYS software’s.
• Conduct dynamic analysis of nuclear structures and components under seismic, thermal conditions (pseudo-static/dynamic), including frequency analysis and structural rigidity assessment.
• Design and calculate anchorages (Pre/Post Embedded Plates using VerifPlatines software or Hand calculations), welds, and bolted connections for piping and equipment supports.
• Propose proportionate modifications when sizing criteria are not met.
• Check steel structures (e.g., base frames, racks), supports for electrical cabinets, batteries, boxes, main cable trays, instrumentation (pressure/temperature/level sensors), and HVAC support systems (for ducts, chillers, condensers, centrifugal fans etc..).
• Support and assist Equipment Department to verify calculation notes for various equipment such as Pumps, Valves, Flanges, Heat exchangers, Tanks, and Pressure Vessels.
• Provide technical clarifications and respond to site requests (RFI, FCR, NCR).
• Offer technical support to other disciplines for a wide range of calculations (handling systems…).
• Prepare and review technical documentation to support design and installation activities.
• Collaborate with installation contractors, civil works (CW) interfaces, and other disciplines (e.g., Electrical, HVAC, Equipment etc) to clarify and resolve site queries, ensuring alignment with project requirements.
• Collaborate with CAD designers to assist for accurate design drawings using 2D and 3D software.

Qualifications, Skills & Experience

• Master’s in science, Mechanical engineering degree.
• First experience of 3 years minimum in Mechanical Calculation, nuclear industry, or equivalent experience.
• Knowledge of EUROCODE, ASME and RCC-M code.
• Knowledge of 2D/3D design and calculation software.
• If possible, knowledge of these specific software: PDMS, NavisWorks, PIPESTRESS, RSTAB, ANSYS APDL and WORKBENCH.
• Knowledge of piping and support calculation tools.

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.

We partner with VERCIDA, for greater online accessibility please visit www.vercida.com to view and access our roles.

Equal Opportunity

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.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team.

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 [e-mail].