Martin Muirhead became a partner in a city firm in 1983, prior to merging with Kingston Smith 1991.

His professional life is split between general practice/litigation support and corporate finance. In his general practice portfolio he covers corporate and personal taxation and general business advice for businesses as well as audit and accountancy. In doing so, he works with limited companies, PLCs, partnerships, charities, individuals and foreign commercial organisations ranging up to £40m turnover. Martin is head of the Kingston Smith Property sector group, and is also an active member of the firm's Technology sector group.

Martin is a member of the Academy of Experts and is involved in litigation support, expert witness and forensic accounting appointments. He was appointed the first ever Receiver by the Charity Commissioners under the Charities Act 1993. Corporate finance activities include acting for purchasers, vendors and carrying out business valuations.