Full job descriptionRole Purpose:
The Critical Services Engineer is a senior, highly competent Low Voltage electrical professional responsible for the planning, execution, modification, testing, and re-energisation of mission-critical LV infrastructure in high-risk environments.
The role requires the engineer to independently lead end-to-end LV works, including shutdown planning, safe isolation, modification works, testing, energisation, and incident response, while operating under strict technical governance, safety standards, and authorisation controls.
This position is not installation-focused. It is an engineering authority role that blends technical depth, operational control, safety leadership, and client-facing accountability
Key Responsibilities:
LV shutdown planning & execution
Panel, MCCB, ACB & busbar modification
Safe isolation (LOTO) & Authorised Person duties
Testing, commissioning & QA packs
Emergency fault & incident response
LV switchgear inspection and assessment
MCCB replacement and configuration
ACB maintenance, retrofit and withdrawal units
Busbar modification and extension works
LV panel and main distribution board modifications
Fault diagnosis and rectification
Testing, verification, and certification
Controlled re-energisation and load monitoring
Thermal imaging
LV panel inspections
Essential Qualifications and requirements:
*NVQ Level 3 Electrical Approved electrician
*18th Edition
*2391 Inspection & Testing
*LV Authorised Person experience
*Proven LV modification experience
*Experience working on Low Voltage systems from 100A to 3200A
*Mission-critical environments with high fault levels and operational dependency
Desirable - City and guilds 2396
Core responsibilities:
1. Engineering & Technical Delivery
The engineer must independently plan and deliver complex LV works, including:
· LV switchgear inspection and assessment
*MCCB replacement and configuration
*ACB maintenance, retrofit and withdrawal units
*Busbar modification and extension works
*LV panel and main distribution board modifications
*Fault diagnosis and rectification
*Testing, verification, and certification
*Controlled re-energisation and load monitoring
2. Shutdown Planning & Control
· Lead planned shutdowns including:
o Isolation matrices
*Switching schedules
*LOTO plans
*Temporary power strategies
*Coordinate multi-board shutdowns and infrastructure dependencies
*Act as the on-site technical authority during shutdown execution
3. Electrical Safety & Authorised Person Duties
· Operate as a Low Voltage Authorised Person
*Apply Electricity at Work Regulations in live operational environments
*Execute and supervise safe isolation, locking, tagging, and proving dead
*Control permit-to-work systems and exclusion zones
*Lead emergency switching and fault response
4. Testing, Diagnostics & Commissioning
· Perform and lead:
o Initial and periodic verification
*Continuity, insulation resistance, polarity, and functional testing
*Thermal imaging and trending
*Load monitoring and post-energisation thermal scans
*Identify defects, degradation, and lifecycle risks
5. Arc Flash & High-Energy Risk Management
· Apply arc flash risk assessments and incident energy principles
*Select and enforce correct PPE and switching boundaries
*Implement arc mitigation and safe switching techniques
6. Documentation & Engineering Authority
· Produce and approve:
o Survey reports
*Engineering packs
*RAMS
*Single line diagrams
*Switching schedules
*QA and completion packs
*Certificates and technical reports
*Maintain 100% documented and auditable works
This is a great opportunity to join a high profile organisation who offer tremendous development and career progression