Process Engineer - Senior / Principal

Actemium UK; Chorley; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Health Shield

Pension

Annual bonus

Share scheme

EV car scheme

26 days holiday

Job summary

Actemium Design, part of VINCI Energies, is inviting applications from experienced Senior and Principal Process Engineers for UK projects across nuclear, energy, chemical processing and heavy industry. You will influence decisions from concept to detailed design and work within a supportive, high-performing team.

We offer hybrid/flexible working, a competitive package with bonus, benefits and car scheme, and opportunities for growth under VINCI Energies.

Qualifications

• Degree-level qualification in chemical or process engineering or equivalent.
• Extensive experience in regulated process design and delivery.
• Proficient with process engineering software (Aspen HYSYS) and CAD tools (AutoCAD).
• Solid understanding of UK and international standards and best practice.
• Proven ability to produce and validate PFDs, P&IDs, datasheets and calculations.
• Excellent communication and team-mentoring skills.

Responsibilities

• Lead or support high-value process engineering design solutions (PFDs, P&IDs, heat and mass balances).
• Collaborate with multidisciplinary teams to ensure integrated, compliant solutions.
• Apply process engineering principles to design safe, cost-effective processes.
• Perform calculations, modelling and simulations to verify performance.
• Participate in HAZOPs, LOPA, safety and constructability reviews.
• Mentor less experienced engineers and contribute to a high-performing team.
• Prepare and update technical documentation, proposals, procurement specs, and client reports.

Skills

Process engineering

PFDs & P&IDs

Regulatory compliance

Aspen HYSYS

AutoCAD

Team mentorship

Communication

Education

Degree in chemical/process engineering

Tools

Aspen HYSYS

AutoCAD

Job description

Ready to shape the future of Process Engineering?

Location: Chorley | Type: Full-time (37.5 hours/week) | Package: Competitive Salary + Share Scheme + EV Car Scheme + Health Shield + Pension + Bonus + Benefits | Hybrid / Flexible Working Arrangements

Actemium Design, part of VINCI Energies, is inviting applications from experienced, innovative Process Engineers for Senior and Principal Engineer levels. If you are passionate about process engineering and driven to deliver excellence within regulated sectors, we want to hear from you.

Senior / Principal Process Engineer

Join our renowned Process Engineering team and work at the forefront of engineering design and project delivery for the UK’s most vital industries, including nuclear, energy, chemical processing, and heavy industry. Our projects span early conceptual development through to detailed engineering, offering you the opportunity to influence key decisions and deliver tangible impact. We’re committed to supporting the growth and development of talented Process Engineers looking to make a difference and shape modern industry.

Main Responsibilities

• Lead or support the delivery of high-value process engineering design solutions, including process flow diagrams (PFDs), piping & instrumentation diagrams (P&IDs), heat and mass balances, process calculations, and technical specifications.
• Collaborate with multidisciplinary teams—mechanical, EC&I, SHEQ, and project management—to ensure fully integrated and compliant solutions for clients.
• Apply expert knowledge of process engineering principles, process systems, and regulatory requirements to design robust, safe and cost-effective processes.
• Undertake rigorous technical calculations, modelling and simulations to verify performance and ensure regulatory, client, and stakeholder requirements are met.
• Actively participate in HAZOPs, LOPA studies, safety and constructability reviews, and other risk management activities.
• Mentor and develop less experienced engineers, supporting a collaborative, knowledgeable and high-performing team environment.
• Prepare, review and update technical documentation, proposals, procurement specifications and client reports.

Essential Skills & Experience

• Degree-level qualification (or equivalent relevant experience) in chemical engineering, process engineering or a related discipline.
• Substantial experience in process design and engineering delivery, ideally within regulated industries (nuclear, chemical, energy, oil & gas, or heavy/process industry).
• Proficient in process engineering software and tools (e.g. Aspen HYSYS, AutoCAD, process simulation packages).
• Strong understanding of UK and international process engineering standards, legislation, and best practice.
• Proven ability to produce, check and validate process design deliverables including PFDs, P&IDs, datasheets and calculations.
• Strong communication skills, with the ability to explain technical concepts clearly to colleagues, clients, and stakeholders from varied backgrounds.
• Organised and analytical, with a focus on quality, risk management and continuous improvement.
• Willingness and ability to travel to client and project sites as required.

What We Offer Process Engineers at Actemium Design

• Competitive salary, enhanced pension contributions, annual bonus, and comprehensive Health Shield plan.
• Outstanding benefits, including 26 days holiday (plus bank holidays), EV car scheme, company share scheme (subject to qualifying periods), and death in service insurance.
• Hybrid and flexible working options to support your work-life balance and enhance productivity.
• Bespoke progression and career development opportunities with support from industry leaders (VINCI Energies).
• An inclusive, supportive, and knowledgeable team environment where your growth and contributions are valued.

About Actemium Design

Actemium Design (formerly North West Projects) is a national engineering design company with a regulated industry sector focus. We offer mechanical, EC&I, process engineering and design alongside project management and control. Being part of VINCI Energies with a turnover of €14 billion has allowed Actemium Design to grow in an exciting and sustainable manner.

Security Clearance

Many of the positions within our company are subject to national security clearance restrictions. This means that your eligibility for certain roles may be affected by your place of birth, nationality, current or former citizenship, and any residency you hold or have held. Further details are available at GOV.UK (United Kingdom Security Vetting).