Following the restoration, William Bruce was appointed Clerk to the Bills in 1660, and Clerk of Supply to the Lords in Council in 1665. Both were lucrative positions, involving collection of fees, from Parliament in the first case, and from petitioners to the Court of Session in the latter. Meanwhile, Sir Robert Moray had established himself as a courtier and scientist at Whitehall, London, and employed Bruce as a trusted messenger between Whitehall and the Duke of Lauderdale, Secretary for Scotland.