Sioui Mitts Seufert is a full-service law firm in Trenton (Quinte West), Ontario, with roots going back more than 70 years. Its four lawyers practise family law, civil litigation, employment law, real estate, business law, wills and estate planning, land use planning, and criminal law.

Practice areas

Family Law Civil Litigation & Dispute Resolution Employment & Labour Law Real Estate Law Business & Corporate Law Wills, Estates & Trusts Administrative & Regulatory Law Criminal Defence

Good to know

A calendar with a checkmark beside a clockBy appointment

Lawyers 4

Caterina E. Gucciardi Associate Family LawCivil Litigation & Dispute Resolution Devin R. Mitts Partner Real Estate LawBusiness & Corporate Law Jennifer L. Seufert Partner Family LawCivil Litigation & Dispute Resolution John S. Wonnacott Associate Criminal Defence

This firm’s lawyers at a glance

Called to the bar
1984–2015 · median 37 years in practice 3 of 4 lawyers
Law schools
University of British Columbia, University of Ottawa, University of Windsor 3 of 4 lawyers

Who handles what

Where to find them

21 Quinte Street, PO Box 397, Trenton, ON K8V 5R6 · 613-965-6430

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Law Society of Ontario directory ↗