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|Date of birth||29 September 1965|
|Place of birth||Petah Tikva, Israel|
|Hapoel Petah Tikva|
|Hapoel Mehane Yehuda|
|Hapoel Petah Tikva|
|1990–1993||Hapoel Mahane Yehuda|
|1993–1994||Beitar Petah Tikva|
|1994–1995||Hapoel Givat Olga|
|1995–1998||Ironi Rishon LeZion|
|1998–1999||Maccabi Petah Tikva|
|1999||Hapoel Kfar Saba|
|2000||Hapoel Be'er Sheva|
|2001||Hapoel Beit She'an|
|2006–2007||Hapoel Petah Tikva|
|2008||Hearts of Oak|
|2011–2012||Maccabi Petah Tikva|
|2012–2013||Hapoel Rishon LeZion|
Born in Petah Tikva, Lahman joined the Hapoel Petah Tikva youth system, but left the club at 16 to join Petah Tikva-based Hapoel Mahane Yehuda. He returned to Hapoel Petah Tikva aged 18, but never played for the senior team.
He was given his first full managerial position by Hapoel Mahane Yehuda in 1991. In 1993, he became Beitar Petah Tikva manager, before moving the Hapoel Givat Olga the following year. In 1995, he was appointed manager of Ironi Rishon LeZion, leading the club to the State Cup final in 1996, though they lost to Maccabi Tel Aviv. In 1998, he moved on to Maccabi Petah Tikva, before joining Hapoel Kfar Saba the following season. After six matches of the 1999-2000 season he left the club and later joined Hapoel Be'er Sheva.
In 2003, he joined Bnei Sakhnin, who had just been promoted to the Premier League. Lahman led the club to survival, and their first State Cup final, which they won, qualifying them for Europe. However, he left the club in 2004.
In 2006, he joined Hapoel Petah Tikva, who were relegated. He started the 2007-08 season at Hapoel Acre, but left the club after 14 matches. In February 2008 he joined Hearts of Oak, but returned to Israel later in the year to manage Maccabi Herzliya. After 8 matches he quit this position in order to become the manager of Bnei Sakhnin.
On June 2009 he signed for one year with AEP Paphos, but in September after just three months with the club he was sacked after one game.
On May 2010 he signed a contract with Hapoel Ra'anana.
On 18 October 2011 he signed a contract with Maccabi Petah Tikva, and on 21 January 2012 he resigned from the club.
- Israel State Cup:
- Winner (1): 2004
- Runner-up (1): 1996