He was 5th Laird of Freuchie. He was infeft in the lands of Corriemony and others in 1582. He succeeded his grandfather in the estate of Freuchie before 1586. In 1590 he and others were exempted from the Earl of Huntly's commission of justiciary. In 1590 he entered into a bond to keep good rule in the Highlands. In 1592 he received a commission of justiciary. In 1609, he acquired from James, Earl of Moray, the Lordship of Abernethy, and from Thomas Nairn of Cromdale, the lands of Cromdale. He received numerous bonds of manrent from members of his clan, and entered into various similar contracts with neighbouring barons. In 1613 he took part against the Macgregors, and the same year he and his clan received a general remission for all offences. In 1620 he and his son, Sir John Grant of Mulben, were appointed deputy-commissioners against the gypsies.