By January 2006, there was tremendous market demand for PGP Valuation (now Colliers International Valuation and Advisory Services) to expand its well known West Coast presence into a national platform. In order to facilitate the growth, PGP Valuation (now Colliers International Valuation and Advisory Services) was restructured from a partner-based firm, to a traditional corporate organization with Ken Harrison moving from partner to CEO. In November 2006, Mr. Harrison oversaw the PGP merger with FirstService (now Colliers International Valuation and Advisory Services), adding international partners in over 50 countries and forming the largest international appraisal firm in the world.
 
Recently, Colliers International Valuation and Advisory Services has been awarded several significant contracts. In March 2007, Colliers Valuation procured a major, five year contract from the California Public Employees Retirement System (CalPers) for valuation, consulting and quality control oversight. In June 2007, Colliers Valuation appraised a $2.2 billion real estate portfolio with properties in 28 states as part of a joint venture with several institutional entities. In November 2008, Colliers Valuation was named by the FDIC as its national quality control oversight manager to order, review, approve and consult on FDIC properties across the United States.
 
Prior to his leadership role, Ken was a staff appraiser at PGP Valuation. Using his experience developing shopping centers and business parks while working as an appraiser, Mr. Harrison developed several key templates and financial models for retail cash flows. As a result, he was invited to lecture at several institutions and became an expert witness in many government condemnation proceedings.
Mr. Harrison has prepared appraisals across the U.S. on several significant properties including: the HBO movie studios, Verizon Headquarters, Queen Mary, and NBC Tower.