Mr. McKellar started his land advancement vocation during the 1970s. Subsequent to turning into a General Contractor, he has dealt with the securing, privilege, financing, plan, development, advertising, property the board and deals of more than 5,000 appended and withdrew homes, 1,300 loft units, and 2.7 million square feet of the business office, R&D and mechanical space. Moreover, he has entitled, planned, and oversaw site development of 14 land regions including Renaissance La Jolla, McKellar Corporate Center, and Britannia Industrial Park. In 1990 Mr. McKellar got the California Builder of the Year grant and in the very year was named the Industry Professional of the Year by the San Diego Commercial and Industrial Council. 

Mr. McKellar is a Director of the La Jolla Beach and Tennis Club and serves on non-benefit sheets including The Bishop's School, the Neurosciences Institute, and Pastors to Prisoners. He is likewise an individual from the Coastal San Diego section of the Young Presidents Organization (YPO). McKellar has recently served on the sheets of Scripps Financial Corporation, San Diego Opera, La Jolla Museum of Contemporary Art, Medical Biology Institute, Scripps Institute of Oceanography (Director's Cabinet),UCSD Board of Overseers, Scripps Clinic and Research Foundation, St. James by the Sea La Jolla (Vestry), the La Jolla YMCA, and the San Diego Literacy Council.