Sullivan started the program for the 1998 season and compiled a 67-45-2 record in six years. The girls won two 28th District titles and were twice the 14th Region runners-up.
Last season the Admirals were 8-9-2.
Prior to taking over the Danville girls, Sullivan spent three years as a Danville boys assistant coach.
Sullivan said he would always remember the enthusiasm of his first team, the parents that helped him get the program started, the 9-7 record in Danville's first season and the back-to-back district titles. But he said the most satisfying thing was something that happened this year.
"Just a couple of months ago, one of my players off that first team, Erin Goode, came into the shop," Sullivan said. "She was helping as an assistant at Lincoln, and it was kind of satisfying to see her come full circle like that. She played for me, then she played at St. Catharine and now she was contributing here in the area."
Danville graduates two seniors off this year's team, but Sullivan said there's plenty of talent coming up.
"We've had some pretty good success, but they've got some real good athletes coming," Sullivan said. "It's time to make a change and it's in good shape for someone else to come in."
Sullivan said he recommended to athletics director Sam Harp that Danville hire Mike Lauer, who served as an assistant to Sullivan this year. Lauer played Division I soccer at Wisconsin-Green Bay.
"He's got a real strong soccer background," Sullivan said. "As far as the game stuff and tactical things, it's a learning curve. That will come with experience on the high school level, but you need to teach technical skills first and then the rest will fall into place."