During the 1997-98 A PFG season, he was found to have been ineligible for two of Litex's games - an away fixture against PFC Velbazhd Kyustendil and a home one vs. Levski Sofia - due to not being properly registered following his transfer from Bursaspor, but despite suffering 3-0 default losses, the team from Lovech won their first title.

[2] In the summer of 2000 Kishishev was purchased by newly promoted English Premier League side Charlton Athletic.

Initially utilised as a right back, manager Alan Curbishley moved him into the midfield position where Kishishev would establish himself in the team.

An almost constant presence throughout most of Charlton's seven-year spell in the Premier League, he had a reputation as a hard worker, a warrior and often topped the team on the distance he ran during games, as shown by the Pro Zone statistics system.

[5] Kishishev impressed many in his short time at Leeds, and got man of the match on his debut which was a 3–2 defeat against Sheffield Wednesday.

His arrival at Elland Road coincided with Leeds' best run of results in the season, but it was too late to save the club from relegation to League One.

Kishishev was retained by incoming manager Nigel Pearson for the first half of the 2008–09 season, acting as a translator for teammate and fellow countryman Aleksandar Tunchev, and inheriting the number 7 shirt worn by outgoing Iain Hume.