Marta Siemiarczuk is a Partner and Head of the Family Law Group of Nelligan Law. Marta is a lawyer and arbitrator and practices in the areas of Family Law and Collaborative Family Law, Estates and Civil Litigation.

Marta has acted as a co-instructor at the University of Ottawa, Faculty of Law, for Civil Procedure and the Alternative Dispute Resolution Program. She is a regular guest lecturer at the University of Ottawa in Family Law. Marta is also a regular columnist on various family law topics for the Law Times.

Getting to know Marta. Watch the video

Marta approaches her work in a client-centered manner, always striving to be efficient and to provide practical and creative solutions. She derives great satisfaction in practicing family law, as it allows her to be involved in a tangible way with her clients, and be able to make meaningful differences to their lives. And while she is dedicated and very driven, she also maintains a good sense of humour.

The focus of her days outside of the office is her family, who motivate Marta to maintain a healthy perspective. Weekends find her either tinkering with renovations around the home, playing with her kids, or getting outdoors to go camping, hiking or canoeing.



  • >Call to Ontario Bar (2003)
  • >LL.B University of Ottawa (2002)
  • >B.A. Honours (Philosophy) University of Western Ontario (1999)

Professional Activities and Organizations

  • >County of Carleton Law Association
  • >Canadian Bar Association
  • >Collaborative Law Network (Ottawa)