Election to Holyrood Martin was elected to serve as a MSP in the
2016 Scottish Parliament election. The seat was previously held by
Alex Salmond. Martin brought forward the Seat Belts on School Transport (Scotland) Bill. The purpose of the Bill is to introduce a requirement to Scottish law that all dedicated home-to-school transport service vehicles are fitted with seat belts, as there is presently no UK legal obligation for the provision of seatbelts on such vehicles.
Failed appointment as a Junior Minister On 27 June 2018 the Scottish Government announced that Martin would be appointed
Minister for Further Education, Higher Education and Science. However, following media attention around a series of offensive blogs Martin wrote during her time as a college lecturer, First Minister
Nicola Sturgeon subsequently withdrew Martin's nomination when presenting her new ministerial team to the Scottish Parliament for approval. Among the controversial blog entries, Martin mocked
trans women as "hairy knuckled lipstick- wearing transitional transgender Laydees". She also wrote of a survey of transgender people, "the EU clearly have a Tranny Trove [of money]". Of Scotland's membership of the United Kingdom she wrote, "Don’t make me trot out the now clichéd comparison to the abused partner in a marriage. Cliché it may be but clichés come from truth."
Backbencher; 2018 to 2023 In September 2018, Martin was appointed as Convener of the Environment, Climate Change and Land Reform Committee. From 2016 to 2018 Martin was co-convenor of the Scottish Parliament cross-party group on Oil and Gas. She has used her time in parliament to highlight the downturn of the oil and gas sector in the North East, and the effect it has had on those living in Aberdeenshire East. Martin has spoken out on behalf of workers who have been discriminated against due to their oil and gas connections, and has been a vocal supporter of the efforts being by the Scottish Government made to assist those facing unemployment.
Minister for Climate Action; 2023 to 2025 On 29 March 2023, Martin was appointed
Minister for Energy. Her role was expanded to include the environment. In May 2024, her role was renamed
Minister for Climate Action.
Acting Cabinet Secretary for Net Zero and Energy; 2024 to 2025 Martin also filled in the role of Cabinet Secretary for Net Zero and Energy for the duration of incumbent Màiri McAllan's maternity leave (July 2024 to June 2025). While Martin served in this capacity,
Alasdair Allan became Acting Minister for Climate Action.
Cabinet Secretary for Climate Action and Energy; 2025 to present In June 2025, Martin was promoted to the position of
Cabinet Secretary for Climate Action and Energy following McAllan's return from maternity leave. ==Personal life==