BEMS Design Engineer

BMS Project Design Engineer

Department: BMS Projects

Reports to:

Principal Engineer

Location:

London & South‑East (hybrid)

Type:
Full‑time

Own building management system (BMS) design and controller software through the full project lifecycle—supporting Estimating and Projects so delivery is predictable, testable, safe, and handover‑ready.

• Complete, coordinated design packs issued to programme dates with minimal rework.
• Clear, testable Des Ops and Cause and Effect (C&E) / functional test schedules that commission smoothly.
• Controller software built from standard libraries and loaded for Factory Acceptance Testing (FAT), with clean backups and change logs.
• Specifications critically evaluated early; risks/opportunities surfaced and resolved via Requests for Information (RFIs) and submittals.
• Compliance and cyber basics demonstrably in place (see responsibilities).
• Site Acceptance Testing (SAT) and Operations & Maintenance (O&M) packs complete at Practical Completion; supervisor/HMI graphics and the end‑user manual accepted on first issue.

1) Pre‑Contract & Estimating Support

• Review sales handover, preliminary design and quotation; highlight risks and opportunities; raise RFIs/submittals.
• Critically evaluate mechanical and electrical (M&E) specifications and plant/control philosophies for clarity, safety, efficiency and testability.
• Assist Estimating with points schedules, outline equipment selections, integration notes, and value‑engineering options; protect margin and lead times.
• Read the programme, understand Royal Institute of British Architects (RIBA) stage context, maintain a design risk register and change‑control notes.

2) System Design & Documentation

Produce and maintain the full design pack:

• Description of Operation (Des Ops) / Sequence of Operation
• Network topology and addressing plans
• I/O schedules and points lists
• Control panel schematics and Bill of Materials
• Schedule of Functional tests / Cause & Effect
• Supervisor/HMI graphics to agreed standards.
• End‑user manual
• O&M compilation to the accepted format
• Digital delivery and data

3) Control Software & FAT

• Build controller strategy from the Des Ops using agreed naming, standard libraries and an explicit alarm philosophy.
• Use a simulator/test harness and scripted tests for repeatable Factory Acceptance Testing; document coverage and defects.

4) Project Delivery Support

• Attend design/technical meetings; keep decisions visible and current (decision log).
• Support commissioning (clarifications, minor strategy updates agreed with the Principal Engineer/Project Manager).
• Provide commissioning pack documents (as‑designed Des Ops, network plans, test sheets, initial backups, trend lists).
• Coordinate panel procurement (long‑lead items), inspection and test plans (ITPs) and factory witness tests with the Principal Engineer/Project Manager.

5) Quality, Compliance, Safety & Cyber (UK‑specific)

• Panels and wiring: design/verify to BS EN 61439 (derating, heat, segregation); apply BS 7671 implications for controls (safe isolation, earthing and basic electromagnetic compatibility).
• Energy and performance: consider Building Regulations Part L (2021), CIBSE TM39 (metering) and CIBSE TM54 (predicted vs actual); note BREEAM/NABERS UK touchpoints where specified.
• Building Safety Act - “Golden Thread”: maintain clear digital records, traceability and change control appropriate for BMS & Smart Homes work.
• OT/IT security: apply IEC 62443‑aware practices; define user roles and password policy; use multi‑factor authentication (MFA) and VPN for remote access; patch where applicable; segregate networks with virtual LANs (VLANs) and access control lists (ACLs); and document backup/restore drills.
• Modern protocols and integration: keep up to date with modern communications and integration protocols, such as BACnet secure, KNX secure and their implications upon the system design.

6) Continuous Improvement

• Feed estimating and delivery with lessons learned; improve libraries, graphics standards and test scripts.
• Use modern tooling:
  Git for strategy/graphics version control;
  Jira/Azure Dev Ops for issues/changes; light Python/SQL for trend…