Derrin Lamker, who coached Osseo to the Class 6A football state championship last fall, said Tuesday that he has resigned ‘‘for family reasons’’ and will take a position on the Edina football coaching staff.

“Osseo was a great place but I am ready for a change and a new challenge,” said Lamker, who coached at Osseo for 11 years. His teams won three conference titles and two section titles. The Orioles claimed their first state title with a dramatic 14-13 victory over East Ridge in the 2015 Prep Bowl.

Lamker’s Orioles defeated intra-district rival Maple Grove in the opening game of the 2015 season but suffered three consecutive losses in September. Osseo won its last two regular season games and marched through the playoffs, winning five games, some in dramatic fashion.

Lamker, who met with Osseo players Tuesday afternoon, declined to elaborate further on why he decided to resign.

His role with Edina is still being determined. Edina, coached by Reed Boltmann, finished with a 3-5 record in the regular season. After defeating Mounds View in the opening round of the Class 6A playoffs, the Hornets’ season ended in a 17-7 loss at Burnville.