Alex Jeannin, who had played for several clubs in his native France as well as for Darlington, was a regular presence during Exeter City’s first two seasons in the Conference between 2003 and 2005.  He later appeared for a number of clubs including Hereford United, Oxford United and Mansfield Town.

Alex began his career at Troyes, his local club, where he mainly played for the reserves in the fifth-tier of French football in addition to making two first-team appearances in Ligue 2 during the 1997/98 season. He then moved to Racing Club Paris and on to Darlington where, from March 2001 to November 2001, he featured in 22 league matches before his contract was reportedly terminated after a breach of discipline. After returning to France to play for RCS La Chapelle, Alex was soon back in English football with the newly-relegated Exeter City in July 2003. 

Playing first in the opening Conference fixture against Halifax Town on 9 August 2003, Alex made 43 league and cup appearances during his first season with the club scoring twice. Another forty appearances - with three goals - followed in 2004/05 as Alex proved to be a steady force at a transitional time for the Grecians.

Released before the end of the 2004/05 season, Alex made a single appearance in the Football League for Bristol Rovers in the final game of the season before joining Hereford United in time for the following season. After helping Hereford return to the Football League in May 2006, Alex didn’t appear for Hereford beyond January 2007 and was soon to join Oxford United followed by brief stints with Kidderminster Harriers and, from August 2008, Mansfield Town. Leaving the Stags at the end of his first season, Alex joined Truro City with whom he spent the best part of two seasons either side of a broken leg. He then moved on to Bideford and Weymouth followed by, from October 2012, Taunton Town.

In 2022 it was reported that Alex was working as a scout for Olympique Lyonnais.