Guillermo César Hansen joined the Luther Seminary faculty in 2008 as associate professor of systematic theology. A native of Buenos Aires, Argentina, Hansen served as full-time professor of systematic theology and ethics (1996-2008), as chairperson of the department of systematic theology (2000-2008) and director of post-graduate and doctoral studies (2003-2008) at ISEDET -- Ecumenical Theological University, Buenos Aires, Argentina. Beginning in 2006 Hansen served as vice president of the United Evangelical Lutheran Church of Argentina and Uruguay.
Hansen received the Master of Divinity degree from ISEDET (1986), the Master of Sacred Theology degree from Trinity Lutheran Seminary, Columbus, Ohio (1988), the Master of Theology degree (1990) and the Doctor of Philosophy degree (1995) from Lutheran School of Theology at Chicago (LSTC).
Hansen served as assistant instructor at Trinity Lutheran Seminary (1987-1988), assistant and visiting professor at LSTC (1990-1993, 2000) and visiting scholar at Universidad Luterana Salvadoreña, El Salvador (1993). Hansen held several positions in the United Evangelical Lutheran Church of Argentina and Uruguay ranging from clergy member to director of studies for the ministerium of the United Evangelical Lutheran Church. Additionally, he has done work with the ELCA and served as an advisor to the Department of Theological Studies in the Lutheran World Federation.
Hansen has presented at numerous conferences and workshops including being the main speaker at the IX Latinoamerican Lutheran Congress, Brazil (1998) and "Los desafíos de la evangelización" for the National Assembly of the United Evangelical Lutheran Church (1998). He has published many articles, essays and chapters in both Spanish and English on public theology, and issues in lutheran and contemporary theology. Hansen has authored with Nancy Bedford Nuestra Fe: Una introducción a la teología -- Our Faith: An Introduction to Theology, and at the moment is finishing three books on the doctrine of the trinity, science and theology, and Lutheran concepts from a Latin American perspective.