Process Commissioning Engineer: Onsite Startups & Growth

JN Bentley; Rhyl; On-site; GBP 45,000 - 65,000; Full time

Job summary

Mott MacDonald Bentley is seeking a Process Commissioning Engineer to join our Wales-based team, supporting process plant commissioning across water, energy, and environment projects. The role involves on-site delivery, overseeing FAT/SAT, and coordinating with subcontractors.

You will mentor Apprentices and Graduate Engineers while ensuring safety standards, QA, and alignment with project requirements. Willingness to travel to multiple sites is essential.

Qualifications

• CSCS and SSSTS qualification required.
• HNC or Degree in Mechanical, Electrical or Process Engineering (or related field).
• Understanding of civil engineering principles and MEICA construction.
• Strong organisational and problem-solving skills.
• Effective communication with team members and stakeholders.
• Valid driving licence and willingness to travel to sites.

Responsibilities

• Plan and deliver commissioning strategy for process plant, including sequencing, FAT/SAT oversight, witness testing and client-facing commissioning meetings
• Support pre-construction through surveys, asset data collection and coordinating commissioning deliverables with subcontractors
• Manage construction-phase activities such as outage/takeover planning, programme management, maintenance and client liaison
• Produce and review RAMS, maintain strong process/COSHH safety standards and drive QA through ITPs, acceptance documents, training materials and completion records
• Lead the commissioning of process assets on site and work as part of the wider commissioning and delivery team
• Undertake laboratory testing on sites to determine performance measures
• Mentor Apprentices and Graduate Process Engineers while delivering all commissioning plan outputs
• Work with key subcontractors on their deliveries, installations and commissioning procedures.

Skills

CSCS & SSSTS

Engineering degree / HNC

Civil MEICA knowledge

Organisation & problem solving

Communication

Driving licence

Education

HNC / Degree in Mechanical, Electrical or Process Engineering

Job description

Mott MacDonald Bentley is seeking a Process Commissioning Engineer to join our Wales-based team, supporting process plant commissioning across water, energy, and environment projects. The role involves on-site delivery, overseeing FAT/SAT, and coordinating with subcontractors.

You will mentor Apprentices and Graduate Engineers while ensuring safety standards, QA, and alignment with project requirements. Willingness to travel to multiple sites is essential.