Greig guided Northern Football to the New Zealand Women's National League championship in 2015.[1]
In February 2016, he was appointed assistant manager of NJ/NY Gotham.[2]
He was appointed manager of Spartans in February 2018.[3] However, after 6 months in charge, Greig stepped down from his position to take up a coaching role with Spartans men’s under-20 side.[4]
In February 2020, Greig was appointed as development manager for Raith Rovers Community Foundation.[5] During his tenure, the RRCF was named Best Professional Club in the Community at the 2021 Scottish Football Association Grassroots Awards.[6]
Greig was appointed as first team head coach of Livingston in April 2024.[7] He left the role in January 2025, citing work commitment issues.[8]