Mr. Edelman began his career in the cable industry in 1962 as a salesman for Viking Industries, an industry leader at that time.

Leaving Viking in 1968, Don became a partner in a small manufacturer of passive products, Cama Electronics.

In 1972, Don joined RMS Electronics, in Bronx, New York. Under Don's direction, RMS rose from an almost defunct company to the leading provider of passive products in the Cable Television Industry. In 1980, the company was listed on the American Stock Exchange.

Don is a member of the Cable Television Pioneers.