About Us


The firm of Williams and Petgrave and the firm of Sandberg, Williams and the firm of Williams and Singh welcome you to this site.  We are associates who together have accumulated many years of success and a great team.

In the criminal field we have had the opportunity to represent those charged with murder and other serious crimes.  Currently we are involved in an extensive three week preliminary hearing on a first degree murder charge in Brampton.

We have represented those charged with alleged sexual assault as well as those who have been sexually abused.   We have represented many, many individuals where the crown has threatened dangerous offender proceedings.

Mental health law, in the firm, began when Justice Haynes was in charge of the Advisory Review Board in the late 1960’s: in fact, one of the firm’s specialties has always been in the area of mental health: in the criminal, family, and civil side.   An example of this was when we represented a lawyer in an aggravated assault charge where the lawyer had stabbed another lawyer at Osgoode Hall.

We have represented clients in multi-million dollar frauds in every corner of the Province and beyond Ontario.  Not too long ago, the firm spent in excess of three months in Regina, Saskatchewan on a Canada wide fraud case.

Our civil side of the practice is extensive.   We recently won an action against a defective baseball diamond owner (Dofasco).   Dofasco did not have proper sun blockage in its field where our teammate client was seriously injured because of a flying ball, hit in the ordinary manner of playing baseball.  We have successfully represented individuals being harassed by government agencies.   It is common for this firm to take on “the underdog" against the bully and win.

We are suing a religious institution for an action in which the client advises, with strong evidence, that this charity defrauded its parishioners.

We deal in serious motor vehicle accident cases where the client has sustained serious and permanent injuries.

It is not unusual for the firm to represent the lawyer, church parishioner, baseball player, business woman, or the indigent.   As an example we are suing a landlord who paid his cleaning lady less than the agreed on price of cleaning.

In family law, we represented a Métis father who has brought a constitutional challenge to a section of the Child and Family Services Act of Ontario. Our work in Family law in the cities of Hamilton, Brampton, Cayuga, St. Catharines and Sudbury is well known.  It is the underdog that drives us to do this tiring work.

In Family Law, we successfully represented a woman who had her young child abducted by the father requiring the firm to obtain, within hours, an order to apprehend the child from the father and obtaining the aid of three different police forces.  We have fought and won many mobility cases.  We are experienced litigators in the field of constructive trusts and in the area of obtaining security for costs before the matter is tried in family law.  We are experienced counsel in the field of bifurcation of the trial process.  For over 50 years the members of these firms have been committed to the handling of divorce, custody and support cases. Where help is needed, we are there.

We are experienced counsel in the field of estate litigation.  Executors have come to us wanting redress from fellow executors; other clients for being cut out of a meaningful amount of the deceased estate when they should have been included.  We normally draw wills and power of attorneys for those individuals needing this service.

We use extensive forensic specialists in civil, criminal, family, and estate work.   We have worked on cases in conjunction with a truck specialist, computer specialist, forensic accountant, cognitive specialists, toxicologist and professor of pharmacology.

Mr. Williams was on the Children’s Aid Society Board over 40 years ago and still remembers his days on that Board. He currently counsel on two murder cases and a Dangerous Offender Hearing. He has done Dangerous Offender Hearing for many years in Ontario and elsewhere.

Mr. Petgrave has extensive experience in Family Law and Criminal Law.  He has experience in matters involving Custody and Access during COVID-19. His work as a settler of complex family cases is well known in the legal community. He is also a fighter for the new Canadians. Immigration Law is his passion.

Having Offices in both Sudbury and Hamilton, the firms think on a global scale.

Criminal Law

Immigration Law

Family Law

Our Services


Williams & Petgrave can help represent you on a complex family law matter:

Divorce, Separation
Child Protection Applications
Children's Aid Society
Catholic Children's Aid Society
Child Custody, Access
Property Division
Child Support
Marriage Contracts
Spousal Support

Occupancy Rent


We can represent you if you have been charged or need legal advice regarding any of the matters below:

Mental Health Law
Crimes of Dishonesty and Driving offences
Weapons Offences
Crimes Involving Threats or Violence


Canadian Citizenship Applications
Student Visa, including your work permit applications, and permanent residence;
Permanent Resident Card renewal
Family Sponsorship Program,
Express Entry (Canadian Experience Class, Federal Skilled Worker Program & Canada Federal Skilled Trades Worker);
Provincial Nominee Program


This firm for fifty years has demonstrated an ability to complete serious matters that have affected our clients in the civil field of law. MOTOR ACCIDENT CASES, SLIP AND FALLS, ASSAULT & BATTERIES, SEXUAL PREDATOR cases and other forms of tort or nuisance claims this firm has done in the past. We have done civil fraud cases blended in the family court when recipients are being defrauded by their spouse.