Job Title: Secondary Design Engineer (P&C;) – High Voltage Substations

About Us

Balfour Beatty Infrastructure India Pvt Ltd. is part of Balfour Beatty PLC; a leading global infrastructure group headquartered in the UK. Our India team works closely with international projects, contributing to the delivery of complex, high-impact infrastructure solutions. We offer a collaborative, structured environment with opportunities to learn, grow, and work on meaningful global projects.

About the Role The Secondary Design Engineer – Protection & Control (P&C;) will be responsible for the design, development and review of secondary engineering deliverables for High Voltage (HV) substations, particularly transmission projects at 132 kV, 275 kV and 400 kV voltage levels. The role covers protection, control, metering, interlocking, AC/DC auxiliary systems and substation secondary wiring, working closely with Primary Design, Civil, Telecom, SCADA and other engineering disciplines. The engineer will be responsible for delivering technically accurate and coordinated P&C; designs in accordance with client requirements, applicable standards, project specifications and quality procedures.

Roles & Responsibilities

Secondary Design – Protection & Control

- Prepare and review Protection & Control Single Line Diagrams (SLDs) and secondary engineering schemes for HV substations.
- Develop protection philosophies and protection schemes for transmission substations, including feeder, transformer, busbar, reactor and associated bay protection.
- Prepare and review protection and control schematic diagrams.
- Develop control, interlocking, indication, alarm and trip circuit diagrams.
- Prepare AC and DC auxiliary supply schematics and associated distribution arrangements.
- Prepare CT and VT secondary circuit diagrams, including protection and metering connections.
- Develop relay and control panel wiring diagrams, termination diagrams and interface drawings.
- Prepare cable schedules, core schedules and secondary wiring schedules.
- Develop trip matrix, alarm matrix, interlocking matrix and signal lists as required by the project.
- Design and review relay panel, control panel and marshalling/interface arrangements.
- Coordinate P&C; interfaces with SCADA, Telecom and substation automation systems.
- Ensure correct interfaces between secondary systems and primary HV equipment,



including circuit breakers, disconnectors, earth switches, transformers, reactors, CTs and VTs.

Protection Engineering

- Develop and review protection requirements for transmission lines/feeders, power transformers, busbars, reactors and other substation equipment.
- Select appropriate protection functions and schemes in accordance with client and project requirements.
- Review protection relay requirements, technical data and vendor documentation.
- Support preparation and review of protection-related technical specifications.
- Coordinate protection interfaces between different bays, substations and associated systems.
- Support protection scheme reviews and technical resolution of design issues.

Engineering Documentation & Deliverables
- Prepare and review secondary design drawings, schematics, wiring diagrams, schedules and engineering documentation.
- Prepare technical specifications for protection relays, control panels and secondary systems.
- Prepare Bills of Materials (BOM) where required.
- Review supplier/vendor drawings and documentation and provide technical comments.
- Support engineering activities during tender, detailed design and project delivery stages.
- Ensure all P&C; deliverables comply with client requirements, applicable standards and project specifications.
- Maintain drawing quality, design consistency and document control throughout the engineering lifecycle.

Coordination & Project Support
- Coordinate closely with Primary Design, Civil, SCADA, Telecom and other engineering disciplines.
- Interface with project teams, clients, vendors and equipment manufacturers for technical clarifications and design coordination.
- Participate in interdisciplinary design reviews and project meetings.
- Support technical risk assessments, design reviews and value engineering activities.
- Monitor engineering schedules and support the timely delivery of P&C; documentation.




- Resolve technical interfaces between protection/control systems and primary plant equipment.

Skills & Experience Expected

- Bachelor’s or Master’s Degree in Electrical Engineering or equivalent relevant discipline.
- 5–10 years of relevant experience in HV Substation Secondary / Protection & Control Design Engineering.
- Solid understanding of protection and control philosophies, secondary circuits, schematics and substation control systems.
- Experience in preparation and review of protection schematics, control schematics, wiring diagrams, CT/VT circuits, trip circuits, interlocking schemes and cable schedules.
- Good understanding of protection requirements for transformers, transmission lines/feeders, busbars and reactors.
- Experience with AC/DC auxiliary systems, relay panels and control panels.
- Experience in secondary design interfaces with SCADA, Telecom and substation automation systems.
- Familiarity with UK utility standards and international engineering practices.
- Experience in both tender engineering and detailed design projects.
- Experience working on UK transmission projects, particularly National Grid and/or SSE projects, is highly preferred.
- Strong coordination and communication skills for working with multidisciplinary and international engineering teams.

Software Skills

- AutoCAD 2023 or equivalent AutoCAD experience.
- Experience preparing electrical schematics and secondary engineering drawings using CAD tools.
- Familiarity with protection relay engineering/vendor software and relevant substation engineering tools is advantageous.
- Knowledge of document management and engineering design systems used on large transmission projects is desirable.

Benefits, Opportunities & Career Impact

- Work on high-impact global transmission and infrastructure projects.
- Collaborate with experienced engineering professionals across international markets.
- Gain exposure to complex HV substation projects and utility standards.
- Grow your technical expertise within a structured, innovation-driven environment.
- Be part of a culture that values safety, quality, collaboration, and engineering excellence.

Compensation: As per market standards

Work Mode: 5 Days/Week – Work from Office

Office Location: N1, Balsa Block, 1st Floor B-Wing, Manyata Embassy Tech Park, Nagawara, Bengaluru – 560045

📌 Secondary Design Engineer (Bengaluru)
🏢 Balfour Beatty India
📍 Bengaluru