Complex sentence: Serwer was a minister-counselor at the Department of State, serving from 1994 to 1996 as U.S. special envoy and coordinator for the Bosnian Federation, mediating between Croats and Muslims and negotiating the first agreement reached at the Dayton peace talks.
Split into simpler sentences: Serwer was a minister-counselor at the Department of State, serving from 1994 to 1996 as U.S. special envoy and coordinator for the Bosnian Federation. During this posting, Serwer mediated between the Croats and Muslims and negotiated the first agreement reached at the Dayton peace talks.