Complex sentence: It was named after Eric D. Juergens of ASA, co-manager of a USAP project to clean up Antarctic waste sites beginning in 1991; director of safety, environment, and health activities, 1992--99, with heightened emphasis on environmental protection.
Split into simpler sentences: It was named after Eric D. Juergens of Antarctic Support Associates, co-manager of a United States Antarctic Program project to clean up Antarctic waste sites beginning in 1991. He became director of safety, environment, and health activities, 1992--99, with heightened emphasis on environmental protection.