Career
Amamoo began his career in 1998 with the famous Ghanaian club Liberty Professionals F.C. and qualified the team from Division One to the Premiership. He left to Dawu Youngsters in 2000, and later joined Ghana Premier League club Heart of Lions in 2002. In May 2003 he moved to Romanian Liga I team Football Club Farul Constanţa.
Amamoo played 25 games with Constanţa and moved to Swedish team Syrianska Football Club, Then he moved to Football Club Sopron He later moved in 2008 to Swedish team Vasalunds IF, after Sweden William moved to Egypt and signed a loan contract for Football Club Telecom Egypt.
He then returned in 2009 to Vasalunds IF in Sweden after his loan. Amamoo joined and signed in 2010 a three-year contract deal with Hapoel Petah Tikva in Israel, but the contract was annulled in March 2011.
He made only 3 appearances for the Israeli club In July 2011, Amamoo signed a one-year contract with Maltese side Floriana.
He received first cap for the Blacks Stars at the friendly match against Australia on 23 May 2008.
The Black Stars goalkeeper, has pledged his continuous support for the family of Ibrahim Dossey, who died on 9 December 2008. The Egypt-based goalie had launched a campaign to raise funds to save Dossey"s life until his death. Amamoo has promised to fund the education of Dossey"s daughter,who was unhurt in the serious car accident that resulted in his death.
“ I have decided to cater for his daughter"s education because if you know Ibrahim,you will know that he was close to her,” Amamoo told.
“ I think so far as I live for long, I will do things that will make her happy in life. I also intend to invite her to Sweden for holidays and all that.
Amamoo could not attend the burial because of his club commitments.