Less than two weeks after the regular season ended, Gwinnett County high school football has a second head coaching vacancy.

Greater Atlanta Christian’s Ken Robinson resigned Tuesday as the Spartans’ football coach and as the school’s director of diversity. He was the team’s head coach for two seasons, following up a six-year stint as a GAC assistant, including four as defensive coordinator.

He will leave a young, promising team for his successor.

“The future’s bright,” Robinson said. “I felt like we’ve got some really talented players. We played a bunch of sophomores this year and a bunch of freshmen, too. When you watch this team next year, they will look different physically.”

Robinson was a successful defensive coach at GAC from 2002-2007, helping teams that all won nine or more games and reached the state quarterfinals three times. In his four seasons as coordinator, he led a defense that ranked in the county’s top four in scoring defense each of those seasons.

He then was selected to replace Jimmy Chupp as head coach after the 2007 season.

“Ken Robinson is one of the most Godly gentlemen I know,” GAC athletic director Tim Vick said. “His priorities have always been God first, family second. He has been an outstanding role model for our players in his years in the GAC football program. We will begin a search immediately for the next leader of our football program.”

GAC made the playoffs for the 14th consecutive season in Robinson’s first season as coach despite a 4-7 record, then slipped to 1-9 this past season with a young team.

The Spartans had talent at the skill positions, but relied mostly on underclassmen up front.

“I told my kids, the things you’ve learned this year are important,” Robinson said. “When they write the record book for this year, it will say Coach Robinson wasn’t a success. But I have a different measuring stick. Check back with me in 20 years. That will tell me how successful I was. And the kids know that. I can see it in their eyes. So this year was a success.”

The veteran coach declined to go into the reason for his resignation, but said it had nothing to do with football.

“I tell my players this, life is about relationships and relationships are about trust,” Robinson said. “When you don’t have that trust, you can’t go forward. That’s where I’m at.”

Robinson, a former linebacker at South Carolina, also played two seasons in the NFL with the Washington Redskins. His son Christian, who played at GAC, is a freshman linebacker at Georgia. His daughters, 11th-grader Sarah and third-grader Caroline, both attend GAC.

Prior to becoming a high school coach, Robinson worked in the corporate world. But he still feels his future is in coaching.

“This is going to sound like I’m bragging, but I’m good at what I do,” Robinson said. “I’m blessed to be a football coach. I’m a football coach, a good football coach. A good preacher, too. I’m going to be a good football coach for somebody.”