Principal Electrical Engineer
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About Insite
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.
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 experience delivering detailed electrical design within industrial, energy or infrastructure sectors, with strong working knowledge of LV and HV systems (up to 11/33 kV).
- Experience performing power system studies using ETAP or similar tools, including load flow, fault level assessments, protection coordination, harmonic analysis and related assessments.
- Competent with cable sizing tools such as ElectricalOM, Amtech or similar, alongside an excellent understanding of the 18th Edition Wiring Regulations (BS 7671).
- Proven ability to lead project design scopes, coordinate multidisciplinary engineering activities and engage confidently with clients, vendors and senior stakeholders.
Please note many of our UK projects require high-level security clearance meaning that visa sponsorship is not guaranteed and is assessed on a case-by-case basis, depending on role criticality and project needs.
Remuneration & Benefits:
We offer a competitive salary tailored to your experience and background. Whether you're earlier in your career or bring more senior-level expertise, we encourage you to apply if this role aligns with your skills, or if you're open to discussing other opportunities within our business and wider Vulcain Engineering Group.
We also offer a benefits package, both standard and enhanced, which is designed to support your wellbeing, development, and financial future, including:
- Annual Leave + Bank Holidays
- Pension Scheme
Why join us?
At InSite, we offer exciting career opportunities for people at every stage - from apprentices and graduates to seasoned professionals.
We’re proud to provide a competitive reward package, flexible working options and generous holiday allowance - because your work/life balance matters.
Join our friendly team in beautiful Pembrokeshire, West Wales, and build a fulfilling career with real responsibility, growth and impact.
If you enjoy tackling challenges and solving problems, you’ll find opportunities to grow your career, stay motivated, and thrive in a dynamic, collaborative environment.
Equal Opportunities:
Insite Technical Services is an equal opportunities employer. We are committed to creating a diverse and inclusive workplace where everyone is valued and respected. We welcome applications from all individuals, regardless of background, and do not discriminate based on age, gender, disability, ethnicity, religion, sexual orientation, or any other protected characteristic.
If you require any reasonable adjustments during the recruitment process, please let us know, and we will be happy to accommodate your needs.
We appreciate every application. However, due to the volume we receive, we’re only able to contact candidates who are shortlisted for this role or who may be a strong fit for future opportunities.