WSP acquires Hulley & Kirkwood

WSP has acquired UK building-services consultancy Hulley & Kirkwood, adding approximately 122 employees and seven offices as it expands specialist engineering capacity across healthcare, defence, education, commercial property, and government work.

WSP said the transaction strengthens its mechanical, electrical, and public-health engineering capabilities while adding a larger regional presence in Scotland. Financial terms have not been disclosed.

Hulley & Kirkwood was founded in 1953 and specialises in building-services engineering. Its work sits within the part of construction and infrastructure design responsible for systems such as power, ventilation, heating, water, fire protection, and other services required for buildings to operate safely and efficiently.

Those capabilities have become more significant as property projects grow technically complex. Hospitals, defence facilities, education buildings, laboratories, offices, and government estates can require close coordination between architecture, energy performance, digital systems, resilience, security, and mechanical and electrical equipment.

Paul Reilly, WSP’s president and managing director for the UK and Ireland, said the acquisition was “an important step in strengthening our building services expertise in the UK”.

WSP intends to combine the acquired team’s sector knowledge with its wider engineering, science, environmental, infrastructure, and project capabilities. A broader internal skill base can allow more of a client’s design work to sit within one multidisciplinary organisation rather than being divided among separate specialist consultancies.

The acquisition also increases WSP’s Scottish presence. Regional scale can matter in professional services because infrastructure and property work frequently depends on long-term relationships with local authorities, health bodies, universities, contractors, developers, and public-sector procurement organisations.

For Hulley & Kirkwood, joining a global consultancy provides access to larger projects, a wider client base, and specialist capabilities that would be difficult for an independent business to maintain across every engineering discipline. Integration will nevertheless require established teams, systems, commercial processes, and cultures to be brought into a much larger organisation.

Professional-services acquisitions differ from many industrial transactions because much of the acquired value sits in employees, technical expertise, customer relationships, and project pipelines rather than physical assets. Retaining senior engineers and established client teams after completion is therefore central to preserving the value the buyer intended to acquire.

The engineering labour market adds another reason for consolidation. Infrastructure spending, building decarbonisation, defence projects, complex public estates, and private development all compete for experienced technical specialists. Buying an established consultancy can give a larger group immediate capacity that might otherwise take years to recruit organically.

Acquisition does not increase the overall supply of skilled engineers, however. Competition for employees continues after ownership changes, and acquired teams can become recruitment targets for rivals if integration creates uncertainty over roles, culture, progression, or location.

Scale can also affect bids. Larger multidisciplinary consultancies may be better placed to compete for projects requiring multiple engineering disciplines, national coverage, extensive insurance, or substantial financial capacity. Smaller specialists can retain advantages in niche expertise, local relationships, and flexibility.

WSP has not disclosed integration targets, cost synergies, or financial forecasts for Hulley & Kirkwood. The immediate effect is operational: approximately 122 specialists and seven offices join the group’s UK platform, with the strongest strategic fit in building services, Scotland, healthcare, defence, and other technically demanding property sectors.

The longer-term value will depend on employee retention, successful integration, and whether the enlarged team translates into additional project wins rather than simply a larger cost base. In engineering consultancy, maintaining expertise and client continuity after the transaction can be as important as the acquisition itself.