Senior Piping Estimator

Job Title:                    Senior Piping Estimator

Location:                    Aztec West, Bristol + Hybrid Working Arrangement

Compensation:          Attractive Salary + Benefits

Role Type:                  Full time / Permanent

Role ID:                      SF72655

Shape the Future of One of the United Kingdom’s Most Critical Nuclear Programmes.

At Cavendish Nuclear we’re working to create a safe and secure world, together, and if you join us, you can play your part as a Senior Piping Estimator, at our Aztec West, Bristol site.

The role

As a Senior Piping Estimator, you’ll have a role that’s out of the ordinary. You’ll take ownership of developing high‑quality, defensible cost estimates for piping and mechanical work packages across a major nuclear infrastructure project. Your work will directly inform planning, commercial strategy, forecasting and governance, ensuring cost certainty and confidence at every stage of delivery.

Day-to-day, you’ll be required to:

• Prepare detailed piping and mechanical cost estimates covering labour, materials, equipment, subcontracted services, preliminaries and indirects
• Develop and maintain robust Basis of Estimate documentation, clearly defining scope, assumptions and methodologies
• Validate estimates using historical data, productivity norms and industry benchmarks
• Collaborate closely with engineering, planning, procurement and construction teams to ensure accuracy and alignment
• Support change control, forecasting, commercial negotiations and estimate assurance activities

This is a full‑time role, working 37 hours per week, based at Aztec West, Bristol. Hybrid working patterns are available. You will work a minimum of two days a week onsite.

Essential experience of the Senior Piping Estimator:

• Extensive estimating experience within large, complex infrastructure, energy or nuclear projects
• Strong technical understanding of piping fabrication, mechanical installation, welding, inspection and testing
• Proven experience developing estimates from early development stages through to project delivery
• Sound knowledge of estimating methodologies, work breakdown structures and cost breakdown structures
• Experience reviewing supplier and subcontractor pricing to support commercial decisions

Qualifications for the Senior Piping Estimator:

• Degree or equivalent qualification in Engineering, Construction Management, Quantity Surveying or a related discipline
• Professional membership or certification would be advantageous (for example AACE, RICS, ICES or equivalent)

Security Clearance

The successful candidate must be able to achieve and maintain Standard (BPSS) security clearance for this role. Further details are available at United Kingdom Security Vetting: clearance levels - GOV.UK (

What we offer

• Generous holiday allowance
• Matched contribution pension scheme, with life assurance
• Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
• Employee share scheme
• Employee shopping savings portal
• Payment of Professional Fees
• Reservists in the armed forces receive 10-days special paid leave
• Holiday Trading is a benefit that allows UK Cavendish employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement. This Window opens February through to March annually.
• ‘Be Kind Day’ enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity
• Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing.

Cavendish

We’re Cavendish Nuclear — a team of c5,000 specialists and a core part of Babcock International Group.

Here, you’ll be part of something bigger. Across clean energy, defence, and civil decommissioning, your work will contribute to projects that are critical to energy security and national protection. Together, we’re shaping a future that lasts — not only through the impact we make, but through meaningful careers that respect your work-life balance.

Join us and discover how far we can go, together.

We are a disability confident committed employer. If you have a disability or need any reasonable adjustments during the application and selection stages, please email View email address on jobs.babcockinternational.com with the subject header ‘Reasonable adjustments requirement’. We’re committed to building an inclusive culture where everyone’s free to thrive. We are happy to talk about flexible working – please ask about alternative patterns of work at interview.

Closing date: 01/06/2026

#CAVDESTNUC

#LI-AN1