[3] He then returned to the University Jean Moulin Lyon III, serving as director of the insurance section then of the Institute of Judicial Studies ; he was Dean of the Faculty from May 1982 to September 1988.
In 1988 he moved to Panthéon-Assas University (Paris 2), where he was director of the Institute of Judicial Studies for ten years, from 1990 to 2000.
[5] He also served outside the university in several capacities: in 1988–89 and 1993–94, as head of the specialist commission on the legal disciplines for the French University of the Pacific; from 1992 to 1999 as a member of the Commission on Education for the National Council of Bar Associations;[6] from 1991 to 1993 as director of the Bar Association training school for the Paris Court of Appeal;[6][7] from 1996 to 2000 as a member of the administrative board of the National School for the Judiciary; and from 2000 to 2003 as director of legal studies at the École Normale Supérieure.
[11] Guinchard has produced numerous reports at the request of international organizations and of the French and Senegalese Ministries of Justice (France and Senegal), many of which led to legislation: Recognizing the importance of studies in comparative law for training lawyers, Guinchard pursued such studies beginning with his second doctorate, for which his dissertation compared French and Swiss law.
[22][23] He instituted seminars in foreign law conducted by visiting professors from countries including Germany, Belgium, Canada, and Israel.
Some of his writings are outspoken, even caustic[26][27] and cover responsibility for miscarriages of justice,[28] and his books include proposals for reform.
[Note 3] He has harshly criticized the function of the Court of Cassation, the French supreme court,[30] and contributed to the debate on judges' being Freemasons,[31] regularly updated his contribution to the Dalloz Encyclopedia of Civil Procedure concerning the liabilities incurred due to miscarriages of public justice, and has studied judicial actions that may constitute a threat to human rights.