At the beginning of her career, Lamont exhibited with the Belfast Association of Artists in 1837 and 1838. She was also exhibited with the
Royal Hibernian Academy (RHA) from 1842 to 1858, and then again in 1870. It is possible that she is the contributing "Mrs Lamont" to the Northern Irish Art Union exhibition in Belfast in 1843 with 2 miniatures. She exhibited 7 miniatures at the
Royal Academy of Arts (RA) in 1856 to 1859 as "Miss La Monte". Lamont is considered one of the earliest known professional woman artists in Belfast, going on to have a very successful career. She was commissioned by many aristocratic families in Northern Ireland, such as Lord Bangor, the
Earl of Belfast, and the Dufferins. Lamont's miniatures of
Lady Dufferin were exhibited by the RHA in 1851 and RA in 1866. Her miniatures of the dowager duchess of Manchester were engraved to be included in the Court Album, and 2 of her works were gifted to
Queen Victoria when her visited
Dublin in 1853. Lamont also produced a series of prints of crayon drawers in 1845, illustrating Moore's Irish melodies. A 1900 exhibition of deceased local artists in Belfast featured two of her paintings. A miniature of Miss O'Hara of Ballymena in the
Ulster Museum is the only known work of Lamont in a public collection. ==Writings==