|Full name||Edson André Sitoe|
|Date of birth||8 September 1988|
|Place of birth||Maputo, Mozambique|
|Height||1.87 m (6 ft 2 in)|
|Playing position||Centre back|
|2010–2012||→ Olhanense (loan)||39||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 2 April 2017.
‡ National team caps and goals correct as of 3 September 2016
Born in Maputo, Mexer began his career with Grupo Desportivo de Maputo. In January 2010 he moved to Portugal, joining Sporting Clube de Portugal for a fee of €173,000 and agreeing a two-and-a-half year contract with the option of a further three.
On 24 February 2010, Mexer made his debut with a Sporting jersey in a reserve team match against C.F. Os Belenenses, for Liga Intercalar. In August, 50% interests on any future transfer revenue received by Sporting were sold to Traffic Group for €87,000, and he spent the 2010–11 season on loan to fellow Primeira Liga side S.C. Olhanense, making his competition debut on 11 September 2010 and playing six minutes in a 0–0 draw at precisely Sporting.
Mexer also played the 2011–12 campaign with the Algarve club, still owned by the Lions, and only missed six league games as his team again managed to retain their top level status. In the 2012 summer, he joined C.D. Nacional also in the Portuguese top tier.
On 19 June 2014, after a failed transfer to the French club in January, Mexer signed with Stade Rennais FC. In only his second appearance in Ligue 1, on 16 August, he contributed with a two goals in a 6–2 home win over Evian Thonon Gaillard FC.
- "Oferta pública de subscrição – Prospecto" [Public offer for subscription – Prospect] (pdf) (in Portuguese). Sporting CP. 10 December 2010. Retrieved 13 January 2011.
- Negócio Mexer está 'fechado' (Mexer deal 'closed'); A Bola, 3 December 2009 (in Portuguese)
- "Mexer: "Venho para o meu clube do coração"" [Mexer: "I come to the club of my heart"] (in Portuguese). Sporting CP. 15 December 2009. Archived from the original on 18 December 2009.
- "Belenenses 1–2 Sporting" (in Portuguese). Academia de Talentos. 24 February 2010. Retrieved 24 February 2010.
- "Edson Mexer rejoint officiellement le SRFC" [Edson Mexer joins SRFC officially] (in French). Stade Rennais. 19 June 2014. Retrieved 19 June 2014.
- "Résumé de match, Rennes-Evian TG (6–2), doublé de Toivonen, Mexer et Ntep" [Match report, Rennes-Evian TG (6–2), braces by Toivonen, Mexer and Ntep] (in French). Goal.com. 16 August 2014. Retrieved 20 October 2014.
- "CAN começa a aquecer" [CAN starts heating up] (in Portuguese). Record. 15 January 2010. Retrieved 20 October 2014.