Mike Sheil says he enjoys his work because his business — information technology — is always changing. And he acknowledges that this is an understatement, as recent events have shown. Sheil, president of Whalley Computer Associates in Southwick, began his career with the computer reseller right after graduating from North Adams State College, now Massachusetts College of Liberal Arts. After four years, he left for a medical device company where he stayed for another four years. Sheil returned to Whalley 24 years ago and rose through the sales ranks until being named president in June 2020.