Following the collapse of EliteXC, Khalidov has expressed interest in a hasty return to KSW, as previously outlined by his signing with ProElite in favor of nonexclusive contract status. Due to a broken hand, Khalidov was unable to return for KSW X on December 12, 2008. Following his recovery, he fought PRIDE veteran Daniel Acacio at KSW XI on 15 May, knocking him out in 1:10 minutes of the first round to win the newly created KSW Light Heavyweight Championship.

Khalidov signed a three-fight deal with World Victory Road Sengoku and his first appearance for the promotion was on the November 7th card against Sengoku middleweight champion Jorge Santiago. Although, the fight was not a title bout, Khalidov defeated Santiago via first-round TKO. A rematch of the bout was held at World Victory Road Presents: Sengoku Raiden Championships 12 on March 7, 2010 for the Middleweight Championship, which Khalidov lost via controversial unanimous decision.

Mamed Khalidov was expected to face Thales Leites and later Matt Lindland at KSW XV However, both fighters were pulled from the card. Instead, Khalidov faced James Irvin at the event and won via submission at 0:33 into the first round. He eventually faced Lindland at KSW 16 in May 2011 and won via submission in the first round.

Khalidov next competed against former UFC fighter Rodney Wallace on May 12, 2012 at KSW 19. He won the fight via KO in the first round.

On December 1, 2012 he defeated Kendall Grove and won the fight via submission (achilles lock). Khalidov next faced Melvin Manhoef at KSW 23 on June 8, 2013, winning the fight by front choke in the first round.

On July 30, 2018 it was announced that Khalidov had vacated his middleweight championship belt in order to pursue a rematch against KSW Light Heavyweight champion Tomasz Narkun. On October 9, 2018, it was announced that the rematch would happen at KSW 46: Narkun vs. Khalidov 2 on December 1, 2018. Khalidov lost the rematch via unanimous decision and retired from the sport in the cage.

In September 2019, news surfaced that Khalidov will be returning from retirement to face Scott Askham in a catchweight bout at KSW 52 on December 7, 2019. He lost the fight via unanimous decision.

In June 2019 news surfaced that the police arrested Khalidov due to alleged illegal import of stolen cars. Khalidov is yet to appear before court.

Khalidov next challenged Scott Askham for the KSW Middleweight Championship in a rematch bout at KSW 55: Askham vs. Khalidov 2 on October 10, 2020. He reclaimed the title via first-minute knockout.