Steven R. Chamberlain, chairman and chief executive of Integral Systems Inc., a satellite software company based in Lanham, has been charged with a misdemeanor sex offense and assault by Howard County Police.

Chamberlain, 49, was charged in the District Court for Howard County with one count of sex offense in the fourth degree and one count of assault in the second degree, the company reported in a filing with the Securities and Exchange Commission yesterday.

The alleged victim is a 14-year-old girl, according to a police spokesman, and the charges were filed on June 2.

Chamberlain "maintains his innocence," and plans to "vigorously fight the charges," the company said in its filing. The trial is scheduled for January, it said.

The company also said its board of directors recently appointed a committee of independent directors to review the situation and report its findings to the company.

Police could not provide additional details yesterday evening because charging documents were not available.

A fourth-degree sex offense can be nonconsensual sexual contact with another person or a consensual sex act between a 14- or 15-year-old and a person who is at least four years older, said police spokesman David Proulx. Assault in the second degree is assault without a weapon.

Chamberlain, a co-founder of Integral Systems, has been chief executive and chairman since June 1992.