Columbia Sanitary, located in the foothills of the Rocky Mountains just outside Denver, has been providing septic services to neighboring communities since 1959. But new ownership and a new line of work in the early 2000s put the company in perfect position to benefit from tremendous growth the city has experienced in the last 10 years.
Sheila and Denny Nessler bought the company in the late 1990s and a few years later added portable restrooms. As majority owner, Sheila Nessler was able to obtain Minority/Woman-Owned, Disadvantaged and Small Business Enterprise certifications, which opened the doors to a number of large public
