The Fairfax Symphony Orchestra is making some changes this season -- adding an apprentice conductor, selecting a new composer-in-residence, bringing on a new concertmaster and hiring an executive director.

Music director William Hudson will be helped at the podium this season by apprentice conductor Kim Allen Kluge, who will substitute for Hudson at regular concerts if Hudson is not able to conduct. He also will direct some children's programs. Kluge is a doctoral student of Hudson's at the University of Maryland.

"I've had quite a few talented students but this fellow could be the most talented of all," Hudson said. His stay with the Fairfax Symphony could be short. He is in the running for the position of music director of the Alexandria Symphony.

Anthony Stark takes over as composer-in-residence this year, following composer Glenn Smith. Stark hopes to continue holding pre-concert lectures, as Smith did, as well as do composing.

Stark, who is a performer and an arts administrator, will give lectures on Carl Nielsen's "Helios Overture," which will be performed Jan. 16 at Fairfax High School, Krzystof Penderecki's Viola Concerto at Fairfax High School Feb. 20, and Copland's "Lincoln Portrait," at the Kennedy Center March 28.

In addition to Stark's duties as an administrator for the Chamber Music Society of Baltimore and Washington's Music at Noon series, he is a free-lance pianist and composer. One of the pieces he will write as part of his residency will be presented by the Fairfax Symphony in the spring of 1989. Hudson said Stark "is a bit more in touch with what's being written, especially with the avant-garde composers."

Hudson admits that while the orchestra has a composer-in-residence, "we're doing less new music than normal." Instead, this year is filled with hits from the standard repertoire.

Ivan Minas-Bekov will become concertmaster this season, succeeding Margaret Thomas, who will move to assistant concertmaster because of her increasingly busy schedule with the Kennedy Center Opera House Orchestra.

The first concert of the season will be held Oct. 17, at the Fairfax High School auditorium and features pianist Nelita True in Mozart's 22nd Piano Concerto, along with music of Tchaikovsky and Borodin. On Nov. 7 the orchestra will perform works by Wagner, Franck, Debussy and Richard Strauss. Jorge Bolet, one of the finest romantic pianists performing today, will join the orchestra at the Kennedy Center March 28 to play the "Rhapsody on a Theme of Paganini," by Rachmaninoff. Violinist Daniel Heifetz will serve as soloist in a concert May 8 at the Kennedy Center, including Tchaikovsky's violin concerto and Dvorak's "New World Symphony."

Mark Ohnmacht, formerly the manager of the Nassau Symphony on Long Island, will become executive director.