Mrs. Jack established her own legal practice in 2003 specializing in Aboriginal law focusing on the protection of Aboriginal and Treaty Rights. Joan also provides legal services in other areas of the common-law by drawing upon the expertise of lawyers from other firms. In this way, she is able to create and lead legal teams that are tailored to meet the needs specific to First Nation governments and communities. Related areas of practice are Employment Law, Contract Law and Corporate Law. Finally, working with First Nation leaders and members/citizens, she has developed expertise in indigenous constitutional development and in the development of indigenous laws.

Generally, "Dibenindizomin" is the concept from within Ojibway philosophy and law that teaches about our being collectively and individually responsible for our own behaviour as human beings. Since the early 90's Mrs. Jack has taught communications, business and native studies, and developed and delivered a two day Aboriginal World View Seminar. Joan has also specialized in indigenous organizational development and offers numerous workshops from team-building, consensus decision-making to exploring indigenous conflict resolution mechanisms.

The Nakina Center for Aboriginal Learning and Living (CALL) was created in 1997 by a group of Taku River Tlingit members lead by Bryan and Joan Jack (Joan being Ojibway from Berens River) for the purpose of preserving Tlingit and Ojibway Spirituality by providing children, youth and families with the opportunities to connect and deepen their land connections thereby promoting healing and Tlingit/Ojibway identity. The program is designed with the intention of providing each First Nation youth participant with an opportunity to develop a relationship with themselves and with others by exercising their cultural relationship with their land and resources in an effort to contribute to breaking the generational impact of the cycle of violence that they are born into. This is about strengthening indigenous identity through practical and culturally appropriate land relationships and our program generally lasts three weeks during the month of July each year.