Mass Tsang LLP
7 lawyers · Established 2013 · City of Toronto
One of 2,345 law firms listed in Toronto, and one of 455 handling Criminal Defence.
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Free consultationVirtual appointmentsAbout Mass Tsang LLP
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Mass Tsang LLP is a criminal defence firm based in Toronto, with an office in the North York Centre area. Jeff Mass founded the firm in 2013 after working as an associate at a small Toronto criminal law firm, and Robbie Tsang joined as a founding partner. The firm practices criminal law exclusively, taking on cases from impaired driving and drug charges to assault, domestic assault, and sexual assault allegations, and it appears at courts across the Greater Toronto Area rather than at a single local courthouse.
Jeff Mass grew up in Montreal in a family of judges and lawyers, completed the dual civil and common law program at the University of Ottawa, and was called to the Ontario bar and the Barreau du Quebec in 2007. Robbie Tsang grew up in Toronto, studied human biology at the University of Toronto, and earned a law degree from Queen's University before being called to the bar in 2005. The firm's seven lawyers together have more than 30 years of combined criminal law experience, and one also takes on cases under Ontario's Dog Owners' Liability Act, defending dogs facing destruction orders along with their owners.
Practice areas
Milestones & recognition
- Robbie Tsang was called to the bar in 2005 and, during law school, studied for a term at East China University of Politics and Law in Shanghai.
- Evan Sinclair holds law degrees from both the University of Windsor and the University of Detroit Mercy, and worked as a student attorney at the Detroit Mercy Criminal Legal Clinic before joining the firm.
- Ruaridh McCartney earned a Juris Doctor from the University of Southampton in the United Kingdom, then completed a Global Professional LLM at the University of Toronto before being called to the bar in 2023 and joining the firm as an associate.
- The firm's website states its lawyers have defended more than 1,200 charges with a 91 percent success rate since the firm was founded in 2013.
Good to know
Wheelchair accessible
LGBTQ+ friendly
Parking available
Virtual appointments
By appointment
In-person servicesFees & payment
Flat fee
Payment plans
Free consultationLawyers 7
Alexei Zaitsev
Senior Associate
Criminal Defence
Brian Brody
Partner
Criminal Defence
Evan Sinclair
Associate
Criminal Defence
Heather Spence
Partner
Criminal Defence
Jeff Mass
Managing Partner
Criminal Defence
Robbie Tsang
Managing Partner
Criminal Defence
Ruaridh McCartney
Associate
Criminal Defence
This firm’s lawyers at a glance
- Called to the bar
- 2005–2023 · median 16 years in practice 5 of 7 lawyers
- Law schools
- Osgoode Hall Law School, Queen's University, University of Ottawa, University of Southampton, University of Western Ontario, University of Windsor and 1 more 7 of 7 lawyers
- Languages on the roster
- Cantonese, Hebrew, Russian
Who handles what
The neighbourhood
Mass Tsang's office is at 5075 Yonge Street in Toronto's North York Centre area, close to Mel Lastman Square. Empress Walk's shops and the Yonge Sheppard Centre are both a short walk away, and North York Centre subway station on Line 1 is also close by, so clients travelling from anywhere along the Yonge subway line can reach the office without a car.
The firm's lawyers don't work out of one local courthouse. They appear at Old City Hall and the Superior Court of Justice at 361 University Avenue downtown, as well as at courts in Newmarket, Richmond Hill, Vaughan, Brampton, and other municipalities across the Greater Toronto Area, so the North York office functions more as a home base for a practice built to travel to wherever a client's charge is being heard.
Frequently asked questions
- I've been charged with impaired driving in Toronto, can Mass Tsang represent me?
- Yes. Impaired driving and other driving offences are among the firm's main practice areas, and its lawyers appear in impaired driving cases across the Greater Toronto Area.
- Does Mass Tsang handle domestic assault or sexual assault charges?
- Yes, the firm's practice areas include domestic assault and sexual assault charges alongside other violent offences, drug charges, and property crimes like theft and fraud.
- What languages can I get help in at Mass Tsang?
- The firm offers services in English, Mandarin, Cantonese, Punjabi, Hebrew, and Russian, so many clients can speak with a lawyer or staff member in their own language.
- Where is Mass Tsang's office and which courts does it cover?
- The office is at 5075 Yonge Street in Toronto's North York Centre, steps from the North York Centre subway station. Its lawyers appear at courts across the Greater Toronto Area, including Old City Hall, 361 University Avenue, and courthouses in Newmarket, Richmond Hill, Brampton, and other municipalities.
- Does Mass Tsang charge flat fees, and can I get a free consultation?
- The firm advertises flat rate fees with no hidden costs, flexible payment plans, and a free initial consultation available 24 hours a day, including evenings and weekends.
- How long has Mass Tsang been practicing, and how big is the firm?
- Jeff Mass founded the firm in 2013. It now has seven criminal defence lawyers with more than 30 years of combined experience, and it practices criminal law exclusively, with no family, civil, or real estate work.
Where to find them
5075 Yonge Street, Suite 501, Toronto, Ontario M2N 6C6, Canada · 416-781-1148
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Employment & Labour LawCriminal DefenceListing compiled from the firm’s public website in August 2026. Verify licence status in the Law Society of Ontario directory ↗