LandMark Consultants, Inc. is a consulting firm providing geotechnical and construction materials testing services in the Imperial, Riverside, and San Bernardino County areas of Southern California. The firm's practice began in 1987 in El Centro, California, with staff operating together since 1982, rapidly earning the reputation for high-quality, cost effective, and responsive technical and professional service. The firm established a branch office in Palm Desert, California in 1989 with a combined total staff of nearly 40 employees. Under the leadership of Mr. Jeffrey O. Lyon, founder and CEO, the firm offers personalized, "small-company" service, working with clients to develop common-sense, constructible, and cost effective solutions to geotechnical and construction challenges. The success of this approach is evidenced by the large number of repeat clients.