Principal Design Engineer – HV SubstationsLocation: Glasgow (Hybrid working available)Salary: Competitive + excellent benefits including car allowance and performance-related bonus.A leading engineering and infrastructure organisation is seeking a Principal Design Engineer to join its growing transmission and distribution team. This is a senior technical role offering the opportunity to lead the design and delivery of complex HV/EHV substation projects across the UK and potentially internationally.Working as part of a highly skilled engineering group, you will take technical ownership from early-stage tendering through to detailed design, construction support and as-built documentation, ensuring compliance with applicable standards, specifications and safety requirements.Key ResponsibilitiesLead and manage all engineering activities across the project lifecycle, ensuring compliance with project specifications, QA/QC processes, HSSE requirements and engineering standards.Act as technical lead on large and complex AIS and GIS substation projects.Supervise and coordinate multidisciplinary engineering teams, including internal specialists, external partners and suppliers.Coordinate interfaces between civil, structural, protection and control, auxiliary systems and primary equipment suppliers.Lead technical discussions with clients and suppliers and respond to site and construction queries.Manage engineering budgets, schedules, forecasts, risks and change control activities.Support technical claims and provide engineering input to project and commercial teams.Technical ScopeDevelop technical solutions including single line diagrams, layouts, equipment selection and supporting calculations.Prepare technical specifications, bills of quantities and cost estimates for tenders and projects.Review supplier designs and test documentation; attend factory and site acceptance tests where required.Provide technical support during tender development, including scheme options and scope definition.RequirementsBachelor’s or Master’s degree in Electrical Engineering (or equivalent).Demonstrable experience in transmission substation engineering, including detailed design, tendering and site support.Strong knowledge of UK utility standards and requirements (e.g., transmission network operators).Chartered Engineer (CEng) status, or actively working toward chartership, is preferred.Technical CompetenciesExpert knowledge of primary substation design, layouts, grounding and lightning protection, and major equipment such as transformers and HV/MV switchgear.Familiarity with system studies including load flow, short circuit calculations and CT/VT sizing.Understanding of protection and control systems and secondary engineering interfaces.Experience supporting installation and commissioning activities is advantageous.Proficiency in MS Office, MicroStation and AutoCAD.Strong communication skills and ability to work effectively in multidisciplinary and multicultural teams.Additional InformationHybrid working model with periodic site attendance as required.Benefits include car allowance, potential bonus and contributory company pension.The OpportunityThis position offers the chance to play a key role in delivering major infrastructure projects that support the evolving energy network. You will join a collaborative engineering environment where technical expertise and professional development are strongly supported.