our story

From our local beginnings over 130 years ago to our vast international presence today, WSP has enjoyed continuous growth and enrichment of its service offering. Every milestone reached has enabled us to better fulfill our purpose of preparing our communities and environment for the future.

WSP Today

WSP is a globally recognized professional services firm employing approximately 49,000 people. 

We welcomed 5,000 experts from ten different acquisitions in 2017, adding to existing expertise in all our operating regions. The largest team to join us was Opus International Consultants Limited, a 3,000-employee professional services firm headquartered in New Zealand, with additional offices in Australia, the United Kingdom, Canada and the United States.

A major highlight of the year was our corporate rebrand: we became WSP across all our businesses in all geographic regions.

Always be the first choice for clients, partners and employees
WSP 2015-2018  Strategic Plan vision

Our story in Switzerland

On May 31, 2017 - WSP acquired Wirthensohn AG

Wirthensohn, based in Luzern, is an engineering office with more than 60 years of experience in Switzerland.

Wirthensohn is recognized for its expertise in building technology (heating, cooling, ventilation, air-conditioning ), building automation (BMS), MEP coordination, energy optimization and efficiency consultancy, as well as  technical and environmental due diligence. The firm has been focusing on Property and Buildings (hospitals, hotels, retail, offices, schools, datacentres, etc.) and Industry (for example aerospace and defense).


Together we are stronger and look forward to supporting our clients in meeting their business objectives.

Our story WSP in Switzerland