The president of Hastings College in south-central Nebraska has resigned after only 18 months on the job, and his replacement has already been selected.

Hastings radio station KHAS/KCIS reported that Dennis Trotter had stepped down, citing an emailed news release from the college.

The release also said the vice president for college advancement, Don Jackson, had been named to immediately succeed Trotter.

College communications manager Alicia O’Donnell said Monday that she didn’t know why Trotter had resigned and that, to her knowledge, his resignation letter didn’t give his reasons.

Trotter began his Hastings College work on July 1, 2011, replacing Phil Dudley.

Hastings College has about 1,200 students and is a private, four-year liberal arts college affiliated with the Presbyterian Church (USA).