Willard Hirschi, an assistant on the Cougar staff for the past 24 years, will replace retiring Clarence Robison as BYU's new head coach of track and field at the end of this season.

Athletic director Glen Tuckett, who made the announcement Wednesday, said that Robison would serve as meet director of the 1989 NCAA championships to be held in Provo. Robison is stepping down after 40 years as track coach for the Cougars.

The new coach, who joined the College of Physical Education at BYU in 1964, will continue to teach in health sciences. Hirschi will be assisted by Sherald James, BYU's cross country coach who also works with the Cougar distance runners.