1. Hakan Hayrettin began his career as an apprentice with Leyton Orient, turning professional in July 1988.

1. Hakan Hayrettin began his career as an apprentice with Leyton Orient, turning professional in July 1988.
Hakan Hayrettin was released without breaking into the first team, joining Barnet in August 1989.
Hakan Hayrettin joined Torquay United on loan in January 1993, playing on loan for Wycombe Wanderers that season as they too won the Conference.
Hakan Hayrettin joined Wycombe on a free transfer in July 1993, playing 27 games, and scoring once, a memorable goal against Preston North End, helping Wycombe to a second successive promotion, via the play-offs.
Hakan Hayrettin then moved on to Doncaster Rovers on a free transfer in July 1995.
Hakan Hayrettin never made the first team with Doncaster and was released in October 1996 due to the same serious knee injury he suffered at Cambridge at the start of the season.
Hakan Hayrettin joined Peterborough United, but the same serious injury forced him to retire from full-time football in 1997.
Hakan Hayrettin left Boreham Wood in July 2000 to rejoin Harrow Borough, both as a player and a coaching assistant, whilst working as a stock processing manager.
Hakan Hayrettin joined Waltham Forest as manager in the 2003 close season, helping the club to win the Essex Senior Cup.
On taking over at Thurrock, Hakan Hayrettin was quoted as saying that "the challenge of raising a "sleeping giant" was too much to resist".
Hakan Hayrettin led the club to the play-offs in his first season in charge, but lost in the semi-final.
Hakan Hayrettin left the club on 7 January 2016 following the appointment of Nathan Jones as manager.
Hakan Hayrettin coached the U23 side winning the Football League Final Third U23 title in their first season back in the Football League.
On 27 September 2016, Hakan Hayrettin was appointed as first-team manager of National League club Braintree Town.
On 9 October 2018, following the departure of Brad Quinton, Hakan Hayrettin was reinstated manager of Braintree Town on an interim basis.
Hakan Hayrettin left Braintree to become Head Coach of Maidstone United in January 2019.
On 9 January 2023, Hakan Hayrettin was sacked with Maidstone sitting in 23rd position.
On 7 January 2025, Hakan Hayrettin was sacked with the club sitting in fifteenth position in the Isthmian League Premier.