Mark joined ASC in 1989 and is presently the Director of Chicago Operations in charge of all projects in the Chicago Metropolitan area. His project assignments at ASC have included geodetic surveys, hydrologic surveys, primary control surveys, and land acquisition. With over 25 years of experience, he has served as an instructor of "Surveying and Mapping" at William Rainey Harper College, lecturer on Illinois Bioundary Law for a national publishing company, field engineer at O'Hare International Airport, and layout engineer for a project overseas.