In 2015, he moved to defending league champions Hekari United and appeared for the club during the 2014–15 OFC Champions League, including in a match against Vanuatu's Tafea in which he scored a goal after an individual effort.

[2] He scored again against Tefana in a 3–2 victory in the team's final group stage match.

[4] He also played for the club in the 2016 OFC Champions League, scoring two goals in three matches of the group stage.

[6] In July 2016 it was announced that Semmy, along with three other Hekari players, signed for Marist FC of the Solomon Islands S-League.

[10] In preparation for the Pacific Games, manager Ricki Herbert named him to the squad for a pair of friendlies against the Solomon Islands.