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Title: Instrumentation and Control (I&C) Engineer
Experience Needed: Open (All Levels Considered)
Working Arrangement: Hybrid – 3 days on site
Location: Bristol

Are you an Instrumentation and Control Engineer who enjoys tackling technically demanding projects in the energy sector? Join ALTEN, a leading engineering consultancy supporting major UK infrastructure programmes that power millions of homes across the country. You’ll contribute to one of the UK’s most high-profile low-carbon energy developments, helping to ensure safe, efficient, and reliable control systems in a highly regulated environment. This is an opportunity to be part of a long-term, technically complex, and safety-critical project that is shaping the future of clean energy in the UK.

Key Responsibilities:

• Design, specify, and validate Instrumentation and Control (I&C) systems in accordance with UK nuclear and safety standards.
• Review and produce technical documentation, including Functional Design Specifications (FDS), Loop Diagrams, and Cause & Effect Matrices.
• Support system integration, commissioning, and site acceptance testing (SAT/FAT) of control systems.
• Liaise with multidisciplinary teams — electrical, mechanical, and systems engineers — to coordinate plant operations.
• Ensure compliance with IEC 61508, BS EN 61513, and ONR safety class requirements.
• Participate in hazard analysis (HAZOP, FMEA) and provide technical support during installation and commissioning.

Required Skills:

• Degree in Instrumentation and Control Engineering (or Chemical/Electrical Engineering with I&C experience).
• Proven experience in I&C system design, specification, and validation.
• Hands-on experience with PLC and DCS systems (e.g. Siemens, Schneider, Emerson, or ABB).
• Knowledge of instrumentation selection and calibration (pressure, temperature, flow, level).
• Experience preparing/reviewing FDS, Loop Diagrams, and Cause & Effect Matrices.
• Familiarity with system integration, commissioning, and site acceptance testing (SAT/FAT).
• Understanding of Safety Integrity Levels (SIL) and control philosophy.
• Background in nuclear, energy, defence, oil & gas, or other safety-critical industries.

Desirable Skills:

• Experience with Allen Bradley systems.
• Understanding of cybersecurity requirements for control systems.
• Familiarity with change control, configuration management, and technical assurance processes.

Required Qualifications:

• Bachelor’s or Master’s degree in Engineering
• OR
• A highly relevant technical background from nuclear sector working on control system

Why join us? 

We foster a community of dually talented individuals who are both entrepreneurs and technology specialists. Our teams embody the spirit of innovation and entrepreneurship, enabling us to develop solutions most efficiently. 

Our commitment to sustainable growth is unwavering, and we continuously strive for accelerated transformation and continuous improvement. Through ALTEN labs, mentoring programs, internal universities, and more, we are always pushing boundaries and embracing new possibilities. 

We offer incredible opportunities to join inspiring projects in the most innovative companies. 

We prioritise your career development with personalised support plans tailored to your own aspirations. We're here to empower you and help you reach your full potential. 

Join our passionate team and start building tomorrow, today! 

In short you get: 

• A personalised career path and a rewarding management style 
• A chance to work on the most exciting engineering projects and technologies along with Premium Customers
• A huge diversity of engineering projects and industries
• A competitive salary
• Private Medical Insurance
• Pension Scheme
• Cycle-to-work Scheme among many additional benefits
• Social atmosphere, regular gatherings, and team buildings
• Flexible way of working (role dependent)

This role will require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.