- 2019-present: Minister of Law and Human Rights RI
- 2019-: Elected as member of DPR RI Dapil I North Sumatera
- 2014-2019: Minister of Law and Human Rights RI
- 2012-2014: the Chairman of PDI Perjuangan Faction MPR RI
- 2000-2014: Vice Chairman of the PARLIAMENT's budget
- 2005-2009: Member of HOUSE of REPRESENTATIVES Commission III, PDI Perjuangan Fraction
- 2005-2009: Deputy Secretary of the PDI Perjuangan Fraction
- 2009-2014: Member of HOUSE of REPRESENTATIVES Commission II, PDI Perjuangan Fraction
- 2004-2005: Secretary Poksi body of legislation, PARLIAMENT PDI Perjuangan Fraction
- 2003-Sept. 2004: Chairperson Commission III North Sumatra Provincial
- 2002-2004: head of the education and training Agency (Badiklatda) was held in North Sumatra
- 2000-2004: Vice-Chairman of the DPD PDI Perjuangan North Sumatra
- 1999-2004: Member of PARLIAMENT of North Sumatra, PDI Perjuangan Fraction
- 1999-2000: Member of Parliament Penatar Kabupaten/Kota se of North Sumatra (USU EXTENSION Implemented and USAID)
- 1998-1999: Dean of the Faculty of law, University of the HKBP Nommensen
- 1998-2000: Coordinator of International Affair Office, University of HKBP Nommensen
- 1994-1998: Chairman of the section/Department of civil law, the HKBP Nommensen University Faculty of law
- 1992-1994: Assistant at the Social Science Research Lab Computer &, College of Humanities and Social Science, North Carolina State University, USA
- 1992-1993: Teaching Assistant. Sociology of Law, Department of Sociology and Anthropology, North Carolina State University, USA
- 1989-1991: Coordinator of Research Intern, University research institutes HKBP Nommensen
- 1987: Research Assistants, Department of Sociology and Anthropology, North Carolina State University, USA
- 1980-1983: Deputy Dean, Faculty of law, University of HKBP Nommensen
- 1978-1983: Attorney and legal advisor
