Nimmo Smith was appointed Standing Junior Counsel (legal advisor appointed by the
Lord Advocate) to the
Department of Employment in 1977, serving until 1982, at which time he
took silk. From 1983 to 1986, he was an
Advocate Depute, representing
the Crown in prosecutions and appeals in the
High Court. From 1986 to 1991, he was Chairman of the Medical Appeal Tribunals and the Vaccine Damage Tribunals, and from 1988 to 1996 was a part-time member of the
Scottish Law Commission. In 1995 he was appointed by Michael Forsyth, the Secretary of State for Scotland, to conduct a local inquiry with the terms of reference: "To inquire into the question whether Monklands District Council have failed to comply with the duty imposed on them by section 7 of the Local Government and Housing Act 1989 to make appointments to paid office or employment on merit, and to report thereon." After conducting the inquiry, which included the taking of evidence at hearings open to the public, he reported on 15 December 1995 that there was no evidence that any such appointment had been made otherwise than on merit. The Secretary of State so advised Parliament on 20 December 1995.
The Bench Nimmo Smith was appointed a temporary judge of the
Court of Session in 1995, and in 1996 was raised fully to the Bench as a
Senator of the College of Justice, a judge of the Court of Session and
High Court of Justiciary, Scotland's
Supreme Courts, with the judicial title,
Lord Nimmo Smith. Whilst a judge of the
Outer House of the Court of Session, he served as the Insolvency Judge from 1997 to 2005, and as one of the Intellectual Property Judges from 1998 to 2005. He also served as a member of the Lands Valuation Appeal Court from 2002 to 2009. In 2002, he was one of five judges who heard
the appeal of
Abdelbaset al-Megrahi, the man convicted of the 1988
Lockerbie bombing, at the
Scottish Court in the Netherlands. He was promoted to the First Division of the Inner House in 2005, at which time he was appointed a member of the
Privy Council, affording him the style,
The Right Honourable. As a judge of the Inner House he served as a member of the Registration Appeal Court from 2005 to 2009. He retired on 30 September 2009. ==Post-Retirement==