Grieve played futsal for Perth Saltires in his teenage years. His first taste of coaching came when he teach "a group of inquisitive children how to do tricks like an elastico and a rainbow flick". While in India, he had a weekly TV-program called The Mind Game. This earned him a nickname "Scottish
Gary Neville". On 1 November 2022, Grieve joined
Forest Green as a new head of scouting. He was instrumental of making 11 signings in the January transfer window. However, on 13 March 2023, Grieve left Forest Green with immediate effect. It was later revealed by local newspaper
Gloucestershire Live that travel was the factor of his departure, due to being based in Dundee. On 19 April 2023, Grieve was appointed as a manager of
SJK Akatemia. He managed his first match at the club, winning 2–1 against SalPa two days later. Grieve led SJK Akatemia to the
play-offs. As a result, he signed a contract extension with the club. However, he helped SJK Akatemia beat
MP 4–1 in the quarter-finals before losing 4–2 against
Gnistan. The inclusion of SJK Akatemia led the Finnish Football Federation to change the rules so that reserve teams and cooperation teams can not promote. His appointment was confirmed on 12 January 2024 where he worked alongside
Toni Lehtinen. Around the same time, Grieve would be studying for Uefa Pro Licence. On 28 May 2024, Grieve was confirmed as SJK's head coach. He helped the club seal a place in
the league's Championship round. He was named the Veikkausliiga Manager of the Month for April 2025. On 30 November 2025, Grieve was appointed head coach of Swedish
Superettan side
Helsingborgs IF on a two-year contract. His previous contract with SJK was amicably terminated. ==Personal life==