Edinburgh, who most recently managed Sky Bet League One side Northampton Town and guided Newport County to promotion from the Conference in 2013, has agreed a two-and-a-half-year deal at the Matchroom Stadium.
Primarily a left-back during his playing days, Edinburgh started out at Southend United before moving to Tottenham Hotspur for a fee believed to be in the region of £150,000 in 1990.
It was at White Hart Lane that the defender spent the best part of 10 years, registering over 250 appearances for the Club. Following his departure in 2000, Edinburgh went on to also represent Portsmouth.
After a spell as Player-Manager at Billericay Town, Edinburgh went on to manager Fisher Athletic and Grays Athletic before guiding Rushden & Diamonds to the Conference play-offs at the end of the 2009-10 season with a fourth-placed finish.
Having enjoyed a successful two-and-a-half-year spell with the Diamonds, administration brought Edinburgh’s tenure to an end before he was appointed manager of Newport County in October 2011.
With the Exiles sitting second to the bottom of the Conference table at the time of his appointment, Edinburgh managed to guide the Club to safety with a 19th place finish as they also reached the FA Trophy Final.
The following season was to prove even more successful for Edinburgh and Newport however, as he guided the Exiles back into the Football League after 25-years with a 2-0 Conference Premier Play-Off Final victory over Wrexham in May 2013. The achievement also saw Edinburgh named the Conference Premier Manager of the Year.
Having attracted interest from several teams, Edinburgh led Newport to a 14th place finish in League Two for the 2013-14 campaign, and then enjoyed a fantastic first half of the following season as the Exiles mounted a play-off push.
That form saw Edinburgh guide Newport to sixth-spot in League Two, and in February 2015 he joined Gillingham as the League One outfit agreed to pay compensation for his services.
Eight victories from the Gills final 18 fixtures of the season saw Edinburgh guide the Kent side to a 12th place finish, before his first full season saw the Club compete at the top of League One for a large part of the 2015-16 campaign before eventually finishing in ninth-place.
Edinburgh departed the Gills in January 2017 and was appointed manager of Northampton Town shortly after on a two-and-a-half-year deal, though left at the start of the 2017-18 season.
Speaking on the appointment, Director of Football Martin Ling said; “We are extremely pleased to be able to welcome Justin to this Football Club. We built up a criteria for a Head Coach and Justin ticked all of the boxes. He has experience in the National League which I feel is of huge importance, but also enjoyed success in this division by achieving promotion with Newport.
“What I really liked about Justin’s CV was that he started in non-league and earned his stripes by succeeding at this level before building on that in the Football League.
“We are focussed on moving this Club forward, but the first hurdle is the most difficult in getting out of this division and that has been proven over the years with several teams that have dropped out of the Football League. Justin has overcome that first hurdle before and is someone that we know can be very productive. He has a record of pulling teams away from trouble and improving them during his tenure.
“It has been an extensive search and we said that we would leave no stone unturned. We feel as a Club that we have got the right man and the sooner Justin starts working with our players and gets this season turning around, the better for every single person that is connected to Leyton Orient.”