Father Sosa was born in Caracas, Venezuela on 12 November 1948. Until his election, Father Sosa has been Delegate for Interprovincial Houses of the Society in Rome, as well as serving on the General Council as a Counsellor. He obtained a licentiate in philosophy from l’Università Cattolica Andrés Bello in 1972. He later obtained a doctorate in Political Science from l’Università Centrale del Venezuela, in 1990. He speaks Spanish, Italian, English, and understands French.