Born in Montevideo, Tejera started out at local amateur sides, and was also a part of Danubio squad in 1977 which first reached the Copa Libertadores in the club's history.[2] Shortly before his retirement (which occurred in 1990), he started studying to become a coach,[3] and joined Defensor Sporting's youth setup in 1994.[4]
Tejera's first managerial experience occurred in 1996, as he was interim manager of Defensor.[5] He was manager of Liverpool Montevideo during the 1997 season,[6] but returned to Defensor in 1998 as manager of their reserve team.[4]
Tejera returned to Liverpool for the 1999 season, but left in January 2000.[7] He returned to Defensor and their youth categories in 2002,[4] and became the club's first team manager in May; with the club in a poor run of form, Tejera recovered the club's form and qualified them to a continental competition after four years.[5]
Tejera resigned in October 2005,[8] and rejoined Liverpool for a third spell in July 2006, replacing Voltaire García.[9] He left the latter club in 2007, and subsequently worked for a short period at Rentistas.
Tejera then spent some time away from football, working at the Administración Nacional de Puertos. On 6 January 2013, he returned to managerial duties after being named in charge of Racing Montevideo.[10] In June, he was replaced by Rosario Martínez,[11] and took over Fénix on 28 October.[12]
Tejera left Fénix in June 2014, as his contract expired,[13] and was named Cerro manager on 8 September.[14] He resigned on 25 November,[15] and returned to Defensor the following 30 June.[16]
Tejera resigned from Defensor on 15 February 2016,[17] and stayed two years without a club before returning to Racing on 13 August 2018.[18] He opted to leave the club the following June, as his contract was due to expire.[19]
On 11 November 2020, after another year of inactivity, Tejera replaced player-manager Sebastián Abreu at the helm of Boston River.[20] He was sacked the following 23 June, with only four points in nine matches into the new season.
