Don Cordell's law practice is primarily concentrated in the areas of estate and related tax planning and business law with particular emphasis in the representation of closely held and family businesses. He also specializes in administering trusts and estates, long-term-care planning and other elder law matters, estate planning for disabled persons, guardianship and conservatorship matters and representation of clients in probate controversies.

At the request of certain clients, Don serves in the role of executor (personal representative) and trustee. He also regularly serves as guardian ad litem by appointment of the Massachusetts Probate Courts.