MEP Technical Services Manager; Mechanical Design

OCS Technical Services is seeking a MEP Technical Services Manager – Mechanical Design with a strong background in designing and reviewing mechanical building services upgrades within existing buildings.

You will lead the technical development of projects including chiller replacements, boiler and heating upgrades, heat pump installations, ventilation improvements and plantroom refurbishments.

Mechanical design expertise is essential. You must be confident producing or checking calculations, specifying equipment, assessing existing systems and challenging consultant and contractor design proposals.

The focus is on refurbishment and replacement projects, often within occupied buildings. You will develop practical engineering solutions that integrate with retained services, improve performance and allow works to be delivered safely with minimal disruption.

Working alongside clients, consultants, specialist contractors and internal project teams, you will support projects from surveys and feasibility through design, procurement, installation, commissioning and handover. You will also coordinate interfaces with electrical, controls and public health services.

Monday to Thursday 08:00–17:00 and Friday 08:00–15:30

Location:

Travel across the London–Bristol corridor and surrounding areas.

• Lead mechanical design development and technical reviews for building services upgrades, refurbishment and plant replacement projects.
• Undertake or review site surveys to establish existing system condition, capacity, performance and installation constraints.
• Produce, review and challenge mechanical drawings, calculations, specifications, equipment schedules and technical submissions.
• Check heating and cooling loads, ventilation rates, pipe and duct sizing, flow rates, pressure losses, pump duties and plant capacities.
• Review and specify chillers, boilers, heat pumps, air handling units, pumps and associated mechanical equipment.
• Assess how replacement plant integrates with existing pipework, distribution systems, electrical supplies, BMS and controls.
• Consider plant access, removal and replacement routes, maintenance clearances, structural interfaces and available space.
• Develop practical strategies for temporary services, shutdowns, changeovers and phased installation within occupied buildings.
• Lead design meetings and technical workshops with consultants, specialist contractors, suppliers and clients.
• Resolve technical queries and coordinate mechanical designs with electrical, public health, architectural and structural requirements.
• Support bids, tenders and procurement through technical specifications, design assessments and supplier proposal reviews.
• Identify technical risks and value engineering opportunities while maintaining performance, compliance and quality.
• Ensure designs meet applicable UK Building Regulations, British Standards, CIBSE guidance and project requirements.
• Review commissioning strategies, support testing and witnessing, and assess technical handover documentation.
• Promote energy efficiency, carbon reduction and whole-life value through equipment selection and system design.
• Develop technical standards, mentor colleagues and share lessons learned across the business.

• A degree, HNC or HND in Mechanical Engineering or Building Services Engineering, or equivalent demonstrable mechanical design training and experience.
• Substantial mechanical building services design experience gained within consultancy, a contractor’s design team or a comparable technical engineering environment.
• Direct responsibility for producing or checking mechanical calculations, specifications and equipment selections.
• Demonstrable experience…