Senior Process Engineer

Senior Process Engineer
Location: Edinburgh
Salary: Competitive DOE
Type: Permanent

Nine Twenty Engineering & Manufacturing are delighted to be working in partnership with Celtic Renewables, one of Europe's most innovative biotech companies, as they continue to scale up their pioneering Acetone-Butanol-Ethanol (ABE) fermentation technology.

Following the successful commissioning of their exemplar plant in Grangemouth, Celtic Renewables are now entering an exciting phase of growth - scaling up to deliver future demonstration and commercial plants in Scotland and beyond.

This is a unique opportunity to join at the heart of design and delivery, helping shape projects that will have a real impact on the global green energy transition.

Why Join?

• Work at the cutting edge of sustainable biotech in a company recognised as a European innovator.
• Be part of Project Willow and future scale-up projects, directly contributing to Scotland's net zero ambitions.
• Lead meaningful projects from design through delivery - not just operations.

The Role

As Senior Process Engineer, you will play a leading role in the design, development, and commissioning of new ABE fermentation plants. You will:

• Lead the development of new plant design, ensuring technical robustness and timely delivery.
• Take ownership of front-end engineering design, including sizing and specifying equipment, producing datasheets, PFDs, P&IDs, and control philosophies.
• Manage the internal design team and external EPC partners, ensuring adherence to standards, safety, and budget.
• Support HAZOP studies and ensure safe, optimised design decisions.
• Provide senior technical support to the operations team at Grangemouth, helping drive optimisation and performance.
• Mentor junior engineers, setting standards and developing Celtic Renewables' project delivery model.

About You

• Degree in Chemical Engineering (minimum BEng).
• 5 - 10 years' process/project engineering experience in an EPC/design-build environment.
• Strong experience in FEED, detailed design, and equipment specification.
• Comfortable leading multidisciplinary teams and external contractors.
• Proactive, resilient, and detail-oriented with excellent communication skills.

Apply now or contact Caroline Strachan: