Joyce is an attorney, licensed in Maryland (1980) and the District of Columbia (1975) . She is the 2024-2025 President and  Distinguished Fellow of the International Academy of Mediators. Joyce has been the Pres. of Joyce A. Mitchell and Assoc. , P.C., since its inception in 1982. Joyce, a certified mediator in the states of Virginia and North Carolina for eleven years, mediates and arbitrates complex employment, business to business, farm related finances, and securities cases nationwide. She facilitates public and organizational disputes. Joyce is a skilled mediation and negotiation trainer.

Joyce is on the mediator rosters of the EEOC, the U. S Postal Service and other Federal agencies. Joyce arbitrates and mediates for the Financial Industry Regulatory Authority; she is a commercial arbitrator for the American Arbitration Association. For five years, she was a co-trainer of the MD State Bar Association’s 40 hr. basic mediation training. She has provided training in elder mediation, advance mediation and negotiation. Joyce provided training for mediation, conflict resolution and early neutral evaluation to the USDA.

Joyce has over 500 hours of mediation training in various methodologies. She has mediated more than 2500 cases. She is a former adjunct professor at the Columbus School of Law, Catholic Univ. where she taught ADR Techniques. For the past six years, she has mediated farm related commercial and public disputes for the MD Dept. of Agriculture's Conflict Resolution Service (ACReS). She teaches arbitration as an adjunct at the Carey School of Law, Univ. of MD in Balt., MD. Joyce is a past chair of the MD State Bar Association’s ADR Section and a former member of Board of the ADR Section of the National Bar Association.