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Diana Sladen



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For Attorney Diana Sladen, the most fundamental area of the law is the law that directly impacts the family. Practicing family law gives Attorney Sladen the chance to practice in an area that truly affects the everyday lives of her clients.  She practices in all areas of family law including pre-nuptial matters, divorce, post-divorce actions, child custody, child support, enforcement actions, modification, adoption, paternity, and LGBT matters.  Attorney Sladen also handles guardianship matters in both probate and juvenile court.  Attorney Sladen also handles most of the Department of Children and Family involvement in the office including: DCF representation during an investigation, DCF representation during an open case, DCF Fair Hearings, and Superior Court appeals for Fair Hearing decisions.

Attorney Sladen takes ownership of each case when a client retains her as their attorney.  She strives to handle every case with great care, detail and responsibility.   Attorney Sladen recognizes the importance of client care in her family law practice. She takes the time and pays close attention to develop specific and unique strategies to meet each client’s needs. She educates her clients on all available options so that her clients can make informed and cost-effective decisions.

Attorneys Sladen and Costigan have worked together for over a decade.  Attorneys Sladen and Costigan practice law differently. When deciding to create a partnership, it was the ability to collaborate that fueled their decision to make the partnership an asset to each client that chose to retain them.

Attorney Sladen has represented husbands, wives, mothers, fathers, grandparents and children.  She has handled cases involving: mental health issues, substance abuse issues, domestic abuse and violence, interstate and international custody disputes,  concurrent matters in family and juvenile court, parental alienation cases and actions involving military members.

Attorney Sladen is a member of the Worcester County Bar Association and Family Law Section.  Attorney Sladen volunteers as a ARC Counsel for the Worcester County Probate and Family Court – representing and advocating on behalf of children in contested custody disputes.   Attorney Sladen and Attorney Costigan are co-chairs of the Conciliation Program for the Worcester County Bar Association.

Attorney Sladen speaks Portuguese and Spanish.  She is a graduate from Providence College with baccalaureate degrees in both Political Science and Philosophy.  Attorney Sladen graduated from Roger Williams University School of Law.  She is licensed to practice law in Massachusetts, Rhode Island Connecticut.  Attorney Sladen is a member of the Shrewsbury Town Center Association.  Attorney Sladen has served on recovery planning boards for the Town of Shrewsbury.​ Attorney Sladen has recently become certified to act as a Category F Guardian ad Litem in the Probate and Family Courts and is on the court-approved list for Worcester County.

Attorney Sladen is married to her husband, Eric, and the couple have two children together.  Outside of the office, she can be found spending time with her family, traveling, dining out at her favorite local restaurant, Willy’s Restaurant, and binging Netflix marathons.