Daniel R. Heller, formerly an associate producer at Olney Theatre, has agreed to plead guilty July 22 to the charge of stealing funds from the Olney Theatre Corp., according to Montgomery County Circuit Court documents.

Court officials would not specify the sum in question, but sources indicated last week that it runs well into five figures. Court documents charge Heller with stealing "U.S. currency of Olney Theatre Corporation, having the value of $300.00 or greater."

Heller's employment at Olney Theatre was terminated March 15.

According to James D. Waring, the theater's executive producer, the "financial irregularities came to light after the first of the year." He referred further questions to the theater's lawyer, who refused comment, as did Heller and his lawyer.

Heller, 32, of Hyattsville, had worked for the respected white-frame theater in the Maryland suburbs for 7 1/2 years, starting as a house manager and moving up to associate producer. In addition, he performed public-relations duties for Catholic University's Hartke Theater. Olney Theatre, designated the state's official summer theater, has been run for the past 30 years as an adjunct of the university's speech and drama department, of which Heller is a graduate.

"As a parent, I can't go into details," said Heller's father, Lester, who indicated last week that his family hoped to reach an "arrangement" with Olney Theatre by July 1.