Soon after 1575 he was appointed one of a commission of classical scholars to draw up a new Latin grammar for use in the Scottish schools.
The following year he was rebuked for endeavoring to extend the judicial powers of the presbytery to the decision of criminal cases.
In 1609 Sharp took part in the Falkland conference, which was intended to make matters easy for the bishops at the general assembly.
On 15 May 1610 he was appointed to the Scottish court of high commission, and held the office till 11 August 1614.
Only one of his works survives, Doctrinae Christianae brevis explicatio, printed by Robert Waldegrave in Edinburgh in 1599.