Mitie Cleaning & Hygiene Services · 4 days ago
Protection and Control Engineer
England, AR
Full-time
Hybrid
Mid LevelMitie Cleaning & Hygiene Services is a leading facilities management and professional services company in the UK. They are seeking two highly skilled Protection & Control Design Engineers to join their high-voltage engineering team, responsible for designing and configuring protection and control systems for high voltage substations and renewable energy projects up to 400 kV.
Facilities Services
Responsibilities
Check and/or approve design deliverables from internal teams and equipment manufacturers
Ensure consistency, quality, and compliance across all design outputs
Produce clear monthly progress reports
Generate accurate technical documentation, calculations, and correspondence
Lead the design and development of P&C schemes up to 400 kV including:
Single Line Diagrams
Key Line Diagrams
Protection Connection & Logic Drawings
I/O Schedules
Tripping Matrices
Relay/CT specifications
Relay Bill of Quantities & Cortec
Battery sizing calculations
Communications architecture/topology
AC & DC schematics
Cable block diagrams, multicore schedules & core sheets
Conduct relay coordination studies and fault analysis (ETAP, DIgSILENT, PSCAD)
Prepare and review protection settings, test plans, and commissioning procedures
Support FAT, SAT, and commissioning activities
Ensure compliance with IEC, ENA, Grid Code, and DNO/TSO-specific requirements
Interface with procurement to ensure equipment meets project and standards requirements
Support multi-discipline coordination, design reviews, and cross-team collaboration
Embed safety and sustainability principles in line with CDM regulations
Follow document control, numbering, naming, and revision management procedures
Contribute to team development and identification of training needs
Produce project-specific designer risk assessments
Qualification
Required
Degree, HND, or HNC in Electrical Engineering (Power Systems preferred)
Previous experience with a consultancy, contractor, EPC, DNO or TSO
Demonstrable experience designing HV/EHV protection systems (11 kV–400 kV) within the UK
Strong understanding of power system fundamentals including faults, short‑circuit levels, stability, and load flow behaviour
Knowledge of transmission & distribution configurations (AIS/GIS substations, mesh, radial, HVDC interfaces)
Understanding of transformer, busbar, reactor, overhead line and cable characteristics up to 400 kV
In-depth knowledge of primary & backup protection including: Transmission lines (Distance, Differential, Communications‑assisted schemes), Transformers (Differential, REF, Buchholz, thermal/overload), Busbars (High‑impedance and Low‑impedance schemes), Feeders, reactors, generators
Experience with protection coordination, grading, and fault‑level studies
Understanding of intertripping, autoreclose logic, and SIPS schemes
Hands‑on experience with modern numerical relays (Siemens, GE, ABB, SEL, etc.)
Competent in relay settings, configuration, logic design, and testing principles
Understanding of communications protocols: IEC 61850, GOOSE, MMS, DNP3, Modbus
Ability to interpret disturbance records and COMTRADE files
Knowledge of substation control philosophies up to 400 kV
Understanding of RTUs, bay controllers, and SAS systems
Experience with SCADA data modelling, interlocking logic, and point lists
Working familiarity with time synchronisation (IRIG‑B, PTP)
Familiarity with relevant standards including: IEC 61850, IEC 60255, IEC 60044/61869, National Grid ESO Grid Code, IEEE and ENA TS
Understanding of DNO‑specific protection standards and approval processes
Knowledge of CT/VT selection, accuracy and saturation characteristics
Experience designing protection panels, marshalling kiosks, and interface wiring
Understanding of AC/DC auxiliary supplies, battery sizing and distribution
Competent producing and interpreting: Schematics, Wiring diagrams, Logic diagrams, Cable schedules
Understanding of IEC 61850‑9‑2 process bus architectures
Knowledge of merging units, sampled values, and digital CT/VT technologies
Awareness of cybersecurity requirements for automation systems
Understanding of FAT/SAT processes, dynamic testing, and end‑to‑end scheme testing
Ability to produce technical documents including reports, protection settings, specifications, and ITPs
Understanding of HV safety rules, electrical clearances, and risk assessments
Awareness of construction sequencing, outage planning and operational constraints
Strong knowledge of quality control, change management, and technical governance
Benefits
Virtual GP on hand for you and members of your household
Financial wellbeing assistance through our Salary Finance scheme
Flexible lifestyle benefits platform, Choices
Access to high street discounts from thousands of well-known retailers, gyms and more through our MiDeals platform
Cycle-to-work scheme
Life cover of up to four times your salary
Enhanced pension contributions
Save-as-you-earn scheme
Mitie Matching Share Plan
Mitie Stars recognition program
Company
Mitie Cleaning & Hygiene Services
With a focus on excellence, innovation and assurance, we are one of the UK’s leading cleaning and environmental service providers.
10001+ employees
Funding
Current Stage
Late StageCompany data provided by crunchbase