Mechanical Engineer (HVAC & Legionella Qualified)

Mechanical Engineer (HVAC & Legionella Qualified)

Location: London

About CBRE Global Workplace Solutions

CBRE Global Workplace Solutions is a leading global provider of integrated facilities and corporate real estate management. Our Critical Services teams protect the world's most demanding operational environments — from financial trading floors to Tier IV data centres — delivering zero-downtime engineering excellence around the clock.

About the Role

We are recruiting a Critical Services Mechanical Engineer (HVAC & Legionella Qualified) to join our team in London. You will be responsible for the safe and compliant delivery of mechanical maintenance, air conditioning, ventilation, and water treatment works within a business-critical environment, operating under CBRE's Safe Systems of Work and in full compliance with statutory and industry regulations.

This role sits within the Critical and Technical Services job function. You will be a competent person under the Health and Safety at Work Act 1974, the Approved Code of Practice L8 (Legionella), and HTM 04-01 where applicable, with specific responsibilities for HVAC operation and water hygiene risk management.

Role Responsibilities

• Carry out planned preventative maintenance (PPM) and reactive fault-finding on all mechanical plant including chilled water systems, cooling towers, AHUs, FCUs, split/VRF air conditioning, CRAC/CRAH units, pressurisation units, and associated BMS-controlled plant.
• Conduct, record, and report routine water hygiene monitoring activities including Legionella risk assessments, temperature monitoring (hot and cold water services), disinfection, TMV servicing, shower head cleaning, and sentinel outlet checks.
• Manage and administer contractor activities relating to water treatment, water hygiene sampling, and Legionella remediation, ensuring all works are documented and closed out in the CMMS.
• Diagnose and rectify faults across refrigerant-based systems (split, VRF/VRV, DX) and chilled water circuits; carry out pre-planned and emergency works in line with F-Gas Regulations 2014 (EU 517/2014, UK retained law).
• Issue and control Permits to Work (PTW) and mechanical isolation certificates in compliance with site-specific Safe Systems of Work (SSoW).
• Perform LOTO (Lock Out / Tag Out) procedures on mechanical plant and maintain an accurate isolation register.
• Maintain an up-to-date log of all work completed and outstanding items via the CMMS (e.g., Maximo / IBM Tririga / ServiceNow).
• Ensure all contractors and staff comply with CBRE, client, and statutory safety and security requirements; conduct contractor inductions and supervise high-risk activities.
• Participate in and support the Critical Services training programme including Water Hygiene, AP/CP Authorisation, and Emergency Procedures.
• Ensure effective communication with the client, management team, and helpdesk, escalating out-of-line situations with incident reports.
• Operate as an effective team member, sharing technical expertise to resolve operational problems and providing cover during holidays, training, and sickness.

Required Qualifications & Certifications

• Mechanical Engineering (Essential): City & Guilds 6187 / NVQ Level 3 in Heating & Ventilating or Mechanical Engineering Services (or equivalent); City & Guilds 6189 or equivalent in Air Conditioning & Refrigeration (RAC) — Level 2 minimum (Level 3 desirable).
• F-Gas & Refrigeration (Essential): City & Guilds 2079 Category I F-Gas Certificate (or equivalent). Practical experience with split, VRF/VRV, DX, and chilled water systems.
• Water Hygiene & Legionella (Essential): City & Guilds 6017 / RSPH Level 2 Award in Legionella Awareness (HSE ACoP L8 compliant). RSPH Level 3 Award in Legionella Risk Assessment and Water Safety Management highly desirable.
• Health, Safety & Compliance (Essential): IOSH Managing Safely or equivalent; Awareness of COSHH, PSSR 2000, and BS 8580-1:2019 / HSG274.

Skills & Knowledge

• Advanced mechanical fault-finding and diagnostic skills across HVAC, chilled water, and ventilation systems.
• Proficiency in the use of calibrated test and measurement equipment.
• Knowledge of BMS/SCADA systems and critical mechanical infrastructure.
• Understanding of water treatment chemistry and biocide programmes.
• Strong verbal and written communication skills across all levels of seniority.
• Ability to prioritise workload and maintain focus in high-pressure, business-critical environments.
• Commitment to a culture of continuous improvement, safety leadership, and team cooperation.
• Accountability for operational issues and focus on resolution within required timescales.

Working Conditions & Circumstances

• 12-hour rotating shift pattern (6 on / 4 off / 4 on / 6 off), covering days and nights.
• Flexibility regarding working hours, including occasional weekend and bank holiday working.
• Provide out-of-hours accessibility as part of the on-call escalation procedure.
• Work will be carried out within live plant rooms and mechanical risers; appropriate PPE provided.
• Security clearance (BS 7858 vetting) required prior to site access.
• Physical ability to work in confined plant rooms, at height, and within the demands of a shift-based environment.

Why CBRE?

When you join CBRE, you become part of the global leader in commercial real estate services and investment that helps businesses and people thrive. We are dynamic problem solvers and forward-thinking professionals who create significant impact. Our culture is built on our shared values — respect, integrity, service, and excellence — and we value the diverse perspectives, backgrounds, and skillsets of our people. At CBRE, you have the opportunity to chart your own course and realise your full potential. We welcome all applicants and are committed to creating an inclusive workplace.

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