The former Oldham Athletic captain took temporary charge at the League One side when ex-manager Lee Johnson left for Barnsley last month.
Lee Johnson left Oldham in ninth place in League One and just two points off the play-off places, and former Latics captain Dean Holden is setting his sights on promotion to the championship.
The 33-year-old leaves Oldham in ninth, seven places above his new club, whom he saw beat Scunthorpe 1-0 on Tuesday night.
Oldham have made a distinctly inconsistent start to the year with two wins, two defeats and a draw and manager Johnson understandably wants some stability.
Oldham secured the services of Jacob Mellis, Jake Kean, Conor Wilkinson and Rhys Murphy, while James Dayton, Paul Rachubka and David Mellor all departed during the January transfer window as Lee Johnson’s men go to Barnsley tonight.
Oldham scored two goals in two first-half minutes as they eased to a comfortable and well-deserved 3-0 win at home to Notts County.
Bradley Dack’s deflected volley with 20 minutes remaining earned Gillingham all three points and left Johnson rueing missed chances.
Manager Lee Johnson expects this week’s developments in the Ched Evans saga will not deter fans from getting behind his team as they face Doncaster Rovers, the Latics looking to start afresh after a torrid end to 2014.
First half-goals from Stephen Arthurworrey, Simon Gillett, and Sam Hoskins saw the away side race into a 3-0 lead at half-time before Kieffer Moore completed the rout.
The last meeting between the two was in April 2013 when Oldham’s Lee Johnson bested his father Gary, winning 1-0 thanks to a solitary goal from Matt Smith.
George Elokobi’s calamitous, late own-goal proved the difference between the two sides as Oldham lost 1-0 in a game in which they spurned several good opportunities.