Born in Pencran, Brittany, Le Guen joined local first division side Brest in 1983 and made his professional debut a year later. He was highly successful with Paris Saint-Germain, winning he European Cup Winners' Cup in 1996.
As a coach he started with Rennes and was then tremendously with Olympique Lyon winning three consecutive French titles. Unfortunately it did not work for him at Rangers.
The highlight of Paul Le Guen's turbulent Rangers career was undoubtedly qualification to the last 32 of the UEFA Cup.
While results and performances on the domestic front were not up to standard, on the European stage Le Guen was undefeated and very successful.
The massive gap between Rangers and Celtic in the SPL at the time of his departure and defeats by the likes of Inverness, twice, Falkirk and Dundee United were simply not acceptable to the supporters.
The shock defeat by St Johnstone in the CIS Cup on November 8 was perhaps the lowest moment for the Frenchman, as Rangers exited a cup competition at home to a lower league side for the first time in their history.
However, in the UEFA Cup Rangers were a far more successful side under Le Guen.
Although not hugely impressive against Molde in round one, they beat them 2-0 at Ibrox after a goal-less draw in Norway to secure a place in the Group and there they did really well.
Rangers won on Italian soil for the first time when Livorno were beaten 3-2, Maccabi Haifa were beaten 2-0 at Ibrox and progression was assured with a battling 2-2 draw in France against Auxerre. Victory in the group was then confirmed with a 1-0 home win over Partizan Belgrade.
It means that whoever takes over has European football to look forward to in February with a last 32 tie against Hapoel Tel Aviv with either Bordeaux or Osasuna lying in wait in the last 16.
However, it is largely in the SPL that every manager is judged and Le Guen's record of 11 wins, six defeats and six draws is not one he will be happy with.
These results have left Rangers 17 points behind their great rivals with 15 matches to go and with Aberdeen and Hearts snapping at their heels.
It all started brightly enough with a sparkling performance in the sunshine at Fir Park when Rangers won 2-1 and played some highly attractive football.
A couple of stumbles against Dundee United and Dunfermline were disappointing but seen as teething troubles, especially when Hearts were beaten 2-0 at Ibrox in what was easily one of the best performances under his management.
Consistency in the league, however, was something that Rangers could not produce under the Frenchman, who arrived with an impeccable CV from three championship-winning seasons in France with Lyon.
It looked as though the side was beginning to hit the right rhythm with a great 3-0 win over Hibs an impressive performance in the 1-1 draw with Celtic and then a great 2-1 away win at Pittodrie.
However a nightmarish 2-1 loss in Inverness on December 27 followed by a 1-1 draw with First Division champions St Mirren showed that consistency was still an issue.
Le Guen's last match was the January 2 1-0 win over Motherwell which was played against the massive backdrop of his decision to strip Barry Ferguson of the captaincy and drop him from the team.
Two days later and he parted company with Rangers taking assistant Yves Colleu, physio Joel Le Hir and fitness coach Stephane Wiertelak with him.