Under English coaches Mick Lyons and David Booth, Brunei turned from minnows to powerhouses that regularly featured in the latter stages of the league season's pinnacle showcase the Malaysia Cup.

[7] His next assignment was for the national team at the 2008 AFC Challenge Cup qualification matches held in the Philippines as assistant to Kwon Oh-son.

[8] He then briefly coached NBT FC in 2008[9] and Indera SC in 2011,[10] and was back with Kwon for the locally-held 2012 Hassanal Bolkiah Trophy which Brunei won.

[11] Moksen was installed by Brunei DPMM FC as assistant coach to the arriving Steve Kean in November 2013, and has been in that position since.

[13] Moksen played for the Brunei national team in all four matches at the 1996 AFF Championship held in Singapore, the most memorable one being a 1–0 victory over the Philippines.