Born in Milton Keynes, Buckinghamshire, Ademeno's second name "Adesola" means "crowned with wealth" in Yoruba. Ademeno was handed a professional contract at Southend United on 15 March 2007. He impressed in the Southend youth and reserve teams, and had successful loan spells at Bishop's Stortford and Cambridge United in the 2006–07 season. Ademeno made his debut for Southend in the 4–1 win against Brentford on 14 March 2006. He came on in the 87th minute for Wayne Gray. His second first-team appearance came in the 3–1 defeat to Luton Town on 28 April 2007, when he came off the bench to replace Richie Foran. He spent much of the 2006–07 season on loan at Cambridge United. On 9 November 2007 he signed a two-month loan deal at Welling United to try to return to fitness after a knee operation. He then joined Rushden & Diamonds on loan until May 2008 on 21 February 2008. In November 2008 he was loaned out again, this time to Salisbury City in a swap deal for winger Liam Feeney.
Following his release from Southend, Ademeno signed for Crawley Town on 26 May 2009. Ademeno starred in his first season at Crawley, scoring on eleven occasions in the league. Ademeno enjoyed a particularly memorable afternoon at Grays Athletic shortly after Christmas, notching a hat-trick within the first eight minutes of the game. The player attracted interest from numerous league clubs in the January transfer window, however no deal was finalised. Ademeno was out of contract as of the end of the 2009–10 season.
Grimsby Town
On 30 June 2010, Ademeno signed a two-year contract with Crawley's Conference National rivals Grimsby Town. Suffering an early injury setback in his first few months with Grimsby it wasn't until 3 January 2011 that Ademeno finally got off the mark with his new club, scoring twice in a 6–1 away win over Histon. Following an injury hit season, on 18 April 2011 despite having a year left on his contract, Ademeno was told he was free to leave the club and that he has no future at the club by Town's new managerial duo Rob Scott and Paul Hurst. On 13 May, Town chairman John Fenty mentioned that the club should have done their homework before signing Ademeno for £10,000 the previous summer. He also mentioned that he thought former club Crawley had done a number on him following Ademeno's injury plagued season that saw him score two goals in seven starts. On 4 June 2011 Ademeno was released by Town by mutual consent.
AFC Wimbledon
Ademeno signed with AFC Wimbledon on 27 June 2011. Ademeno scored his first goal for AFC Wimbledon after coming on as a substitute in a 3–2 opening day defeat to Bristol Rovers. However, with injury and poor form limiting him to only 6 starts for the Dons, Ademeno's contract was terminated in January 2012.
Eastbourne Borough and Salisbury City
Ademeno signed for Eastbourne Borough on 21 March 2012, reuniting him with former Salisbury City bossTommy Widdrington. He was released in October, being deemed surplus to requirements. On 6 November 2012, he joined fellow Conference South side Salisbury City on a free transfer with a view to a full-time contract.
Margate
He departed at the end of the season and joined Margate for their 2013–14 campaign.
Coaching career
Since 2017 Ademeno has been employed by Fulham as the clubs Inclusion Officer, working with their academy and youth teams.
