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Colliers appoints Willem Janssen to lead its South East offices team

14 02 22 Colliers appoints Willem Janssen to lead its South East offices team hero

Colliers has strengthened its South East presence with the appointment of Willem Janssen, as lead director of the South East Offices team.

The move marks a return to Colliers for Willem who spent the last two years client side as Leasing Director for Emerson Group’s 500,000 sq ft South East Office portfolio, giving him a unique client perspective. A seasoned director with 28 years of real estate experience, he specialises in advising clients on office space from inception through to occupation and eventual disposal.

In his new role at Colliers, Willem will continue to drive the team’s robust performance, identifying key growth areas and advising clients on positioning their portfolios to achieve their ESG ambitions. The appointment is the first in a series of strategic hires for the team which is strengthening its capacity and depth of service following a string of new client mandates.

Michael Hawkins, Head of National Office Agency & Development UK for Colliers, commented: “I’m thrilled to welcome Willem back to lead a forward-thinking team providing cerebral, strategic advice to our clients. Our key objective is to protect and enhance value for clients, by ensuring intelligent lease structures are negotiated, something Willem specialises in.”

Willem Janssen, lead director, National Office Agency, South East, Colliers added: “The opportunity to return to Colliers was too good to miss. I look forward to building strategic partnerships with owners and occupiers across the South East. I’ll be working closely with them to future proof their portfolios, calibrate office occupation strategies and drive positioning towards the highest performance and net zero carbon standards.”

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Michael Hawkins

Director- Head of National Office Agency and Development UK Regions

National Offices


I have over 28 years experience in the Real Estate profession, focused on the North West of England but with particular emphasis on Manchester City Centre. Ten of those years was as lead Director of Lambert Smith Hampton’s Office Agency Department and after that ten years as the Principal Development, Investment, Office Agency Director at my own firm WHR. Based in Colliers Manchester office I offer a depth and breadth of commercial experience to Investors, Developers, Landlords and Occupiers with particular regard to complex mixed use scheme with a focus on procurement of Planning, Development, Letting and Disposal of City Centre office schemes. I deal with all aspects of office agency where I have been one of the principle protagonists for the evolution of Manchester’s City Centre office market. My role includes providing Developers / Investors a unique insight into occupational requirements and how they should and will influence the design criteria of complex refurbished projects as well as ground up new build schemes. I pride myself in delivering performance for Colliers clients in a competitive market place.

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Hannah Zitren

Associate Director

Marketing & Communications


I am responsible for media relations and generating coverage in top tier broadcast and print media. I work across a range of Colliers’ UK & Pan-EMEA business lines advising on their strategic and tactical PR needs.

My role includes:

·         Developing and executing PR plans for the various business lines to help promote their key messages across all aspects of the media - print, broadcast and social.

·          Media evaluation and reporting objectives, targets and successes across the business.

·         Reputation management and crisis management.

·         Media training.

·         Media engagement: setting up meetings with top tier media and various internal spokespeople to continuously expand and build a presence with property and vertical media network.

·         Consistently delivering service excellence, meeting with business heads of a regular basis and trying to influence the research as much as possible to ensure our content has a strong enough news hook.

·         Key campaigns that I work on include MIPIM; MAPIC; REVO; Midsummer Retail Report; IHIF; Cities of Influence in addition to a host of all alternative property sector research reports.

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