Principal Electrical Engineer

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InSite Technical Services Limited (InSite) is a UK-based engineering consultancy with an international footprint, delivering expert engineering design, project management, and technical support across a range of energy and industrial sectors. With a strong track record in the oil refining, terminals, LNG, and renewables industries, InSite is committed to helping clients meet the challenges of the energy transition and deliver projects that support a more sustainable future.

Our team of experienced engineers brings technical expertise and industry insight to every project, offering value, assurance, and innovative thinking from concept to execution. InSite specialises in conceptualising, designing, and supporting projects that have a lasting, positive impact on the world of tomorrow.

The Position:
Principal Electrical Engineer

We are seeking a Principal Electrical Engineer to strengthen our growing engineering and design consultancy. This role is ideal for an experienced electrical professional who brings deep technical expertise, particularly in power systems and power system studies, and can provide disciplined leadership across a diverse portfolio of industrial and energy projects.

As a senior member of the team, you will lead key technical decisions, oversee complex electrical design scopes, mentor engineers across all levels, and represent the electrical discipline in high-impact client, contractor, and vendor engagements. You will play a pivotal role in shaping best practices, improving design approaches, and elevating the technical capability of the team.

Some of the main responsibilities of the Principal Electrical Engineer will include:

• Lead the production, review and approval of electrical engineering documents including calculations, specifications, datasheets, schedules, drawings and technical reports.
• Provide expert input on complex electrical design activities such as cable sizing, load assessments, network configuration, system architecture and power system design.
• Act as the technical authority for power system studies, including load flow, fault level assessments, protection coordination, arc flash analysis, harmonic studies and overall system resilience.
• Deliver and oversee power system studies using ETAP or similar tools, and lead the definition of network design requirements for LV and HV systems, protection philosophies, earthing strategies and operating concepts.
• Define scope, deliverables and resource requirements for electrical engineering work packages, providing accurate input to schedules, estimating, risk identification and change management.
• Represent the electrical discipline in client meetings and technical discussions, resolving complex design queries and coordinating with vendors and contractors to ensure technical integrity.
• Work closely with other engineering disciplines to deliver integrated, high-quality project solutions, contributing to design reviews, HAZOPs, model reviews and key technical checkpoints.
• Mentor and develop engineers and apprentices, promoting a culture of engineering excellence, quality and continuous improvement across the team.

This role offers the opportunity to lead technically challenging, high-impact projects while playing a key part in shaping and enhancing the capability of the electrical discipline. You’ll join a growing consultancy where your influence directly contributes to team development and client outcomes, with professional development, Chartership support and clear pathways into discipline leadership. Working within a collaborative, multidisciplinary environment where technical expertise is genuinely valued, you’ll have the autonomy and scope to make a real impact.

If you are an experienced Electrical Engineer ready to step into a Principal-level role - or already operating at Principal level and seeking greater technical influence and responsibility - we would welcome your application.

Preferred Profile:

• Degree in Electrical Engineering or equivalent relevant industry experience (HNC/HND or similar also considered), with Chartered Engineer status (or working towards) advantageous.
• Significant…