Millington stepped up to become Town boss soon after the 2021-22 season ended, replacing Pete Wild when he left to join Barrow.
After a tough start in his first season, The Shaymen eventually managed an 11th placed finish and went on to win the FA Trophy for the second time in their history by beating gateshead 1-0 at Wembley.
Millington then guided Halifax to a play-off finish in his second season before losing 4-2 to Solihull Moors.
Another top seven finish was secured this season, but Town crashed out at the first hurdle again, losing 4-0 at Oldham Athletic.
We take a look back at his first team selection as Shaymen boss, in a 2-0 defeat at Barnet on August 6, 2022 and see where those players are now.
13. Luke Summerfield
Also on the bench at Barnet for Millington's first game, Summerfield's quality was never in question at The Shay, but the midfielder was hampered by injuries. Joined Kidderminster last summer but sustained a broken leg not long into last season. Photo: Chris Nutton/FC Halifax Town
14. Sam Minihan
An unused sub that day, Minihan was another who never really showed his full potential at Town, making just 11 league appearances that season. Joined former Stockport team-mate Keane at Southport last summer and was a first-team regular for them this season. Photo: MARCUS BRANSTON
15. Rob Harker
Scored some important goals in his time at Town but also never really fulfilled his potential either. Now playing his football in Australia. Photo: Chris Nutton/FC Halifax Town
16. Milli Alli
Along with Summerfield and Harker, Alli came off the bench in that game at Barnet and proved to be a terrific signing. Went on to join Exeter in the 2024 January transfer window before moving to Luton in the Championship for £1.5m. Photo: Chris Nutton/FC Halifax Town