Walker focuses primarily on industrial real estate sale and lease transactions involving warehouses, manufacturing facilities and land in the Houston area. He was named Principal in 2010, and was elected as a Director in 2013. He leads the industrial section of the firm, a group comprised of 22 industrial real estate specialists.

He has demonstrated consistent leadership in revenue production and has been recognized as a regular top ten performer in Houston. Walker has also achieved revenue performance in the top 10% of all Colliers offices worldwide.

Prior to joining Colliers, he graduated from the Jesse H. Jones Graduate School of Management at Rice University. While earning an MBA, he worked for FedEx in Hong Kong. Prior to graduate school, Mr. Barnett served for four years on the legislative staff of United States Senator Bill Frist in Washington, DC.

Walker received an MBA from the Jesse H. Jones Graduate School of Business at Rice University in 2002. He graduated from Vanderbilt University in 1996.