Burleson LLP , a top national energy law firm that recently opened a Denver office, this week announced the hiring of one of the top enforcement officials from the Colorado Oil and Gas Conservation Commission (COGCC) – the state agency that regulates oil and gas drilling. The firm on Tuesday issued a release announcing it has hired Robert A. Willis, who “has joined the energy law firm’s Denver office and will concentrate his practice in oil and gas law, with a specialty in regulatory affairs.” Willis previously served as acting hearings manager, enforcement officer and hearings officer for the COGCC