Senior or Principal Mechanical Building Services Engineer

Overview

As a Senior/Principal Mechanical Building Services Engineer, you will shape mechanical design solutions for infrastructure and Ministry of Justice facilities, leading delivery on complex projects or providing technical leadership across a portfolio. You’ll work with cross-disciplinary teams, mentor junior engineers, and ensure compliant, high-quality design from survey through handover. This role offers scope to influence secure, public-infrastructure buildings and advance BIM-led delivery in a challenging environment.

Pay / Benefits

• competitive benefits package
• flexible working
• professional development
• opportunities to work on technically challenging public-infrastructure projects

Responsibilities

• Lead the design of HVAC, heating, ventilation, cooling, water services, drainage and related systems
• Prepare and review calculations, specifications, drawings, schedules and reports
• Develop projects from concept through construction, commissioning and handover
• Coordinate with electrical, structural, architectural and other disciplines
• Conduct surveys and assessments of existing facilities
• Create practical refurbishment, upgrade and new-build solutions
• Ensure compliance with Building Regulations, standards, and CDM
• Manage design quality, risks, budgets, and schedules
• Engage with clients, contractors, suppliers and stakeholders
• Provide construction-stage support and respond to design queries
• Mentor engineers and technicians
• For Principal level: lead teams, approve deliverables, manage resources and contribute to bids

Key requirements

• Degree or equivalent in Mechanical Engineering, Building Services Engineering or related field
• Significant experience designing mechanical building-services systems
• Experience in a consultancy or multidisciplinary design environment
• Strong knowledge of HVAC, mechanical plant, water services and controls
• Experience producing and checking calculations, specifications and design docs
• Knowledge of Building Regulations, standards and CDM responsibilities
• Experience with AutoCAD, Revit and BIM-led delivery
• Strong client, stakeholder and project-management skills
• Incorporated or Chartered status, or progress toward professional registration
• Principal level: Chartered status or equivalent leadership and commercial capability
• Experience in prisons, courts, government buildings, defence, healthcare, education or other sensitive environments (advantageous)
• Ability to obtain MOJ security clearance

• Client-facing communication
• Stakeholder management
• Mentoring and team leadership
• HVAC design
• Mechanical plant and water services
• AutoCAD

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