He returned to Scotland in 1682, graduated at the university of St. Andrews on 24 July 1696 and, after serving as a private chaplain, was licensed by the presbytery of Kirkaldy on 22 June 1699.

On 1 April 1710 he was appointed by Queen Anne, at the instance of the synod of Fife, professor of divinity at St. Mary's.

He devoted his inaugural lecture to an attempt to confute the deistical views lately promulgated by Dr. Archibald Pitcairn in 1688.

George died that same year, and in 1685 his wife moved the family to Rotterdam to avoid the fierce persecution which was carried out against the Covenanters.

The surviving scripts of his sermons show him to have been richly theological, deeply experimental (i.e. dealing with the experiences of the soul) and very practical—a master of the classic Puritan style of preaching.