Department profile
Blake, Cassels & Graydon LLP

Disputes (International & Cross-Border)

Global Guide 2026 : Canada


Blake, Cassels & Graydon LLP

Rankings

Chambers Review

Provided by Chambers

Disputes (International & Cross-Border) - Canada

Band 1

Band 1


What the Team is Known For

Blake, Cassels & Graydon is a market-leading independent Canadian law firm with strong full-service capabilities and teams highly adept in advising clients on cross-border matters. It benefits from strong teams across Canadian centres and representative offices in New York and London, as well as from its close relationships with local firms. The law firm provides deep resources and specialist expertise across transactional and contentious, and across industry sectors, making it a strong choice for inbound work and a proficient coordinator of international mandates for major Canadian clients.

Blake, Cassels & Graydon provides best-in-class advice to Canadian and foreign clients and is regarded as a market leader for disputes work. The law firm is often called upon in relation to class action and product liability cases involving Canadian and foreign entities, often with directly related or parallel proceedings in the USA. It also offers clients experience of cross-border securities and corporate litigation, which is frequently called upon by major clients who work closely with its stellar banking practice. The disputes teams also represent clients in arbitration and litigation on international cases – partnering with other firms – on issues involving clients’ global assets and investments, often on behalf of energy, mining and investor clientele.

Strengths

Provided by Chambers

  • Blakes, Cassels & Graydon has a deep bench of arbitration lawyers to support large complex matters.

    Disputes (International & Cross-Border) respondentGlobal
  • The team at Blakes is very effective and knowledgeable, whilst being highly responsive and providing a stellar work product. They are very proactive.

    Disputes (International & Cross-Border) respondentGlobal
  • Blake, Cassels & Graydon have excellent lawyers who are able to handle complex and sophisticated matters across different jurisdictions.

    Disputes (International & Cross-Border) respondentGlobal
  • The team at Blakes was responsive, smart and able to handle a complex matter competently.

    Disputes (International & Cross-Border) respondentGlobal

Notable Practitioners

Provided by Chambers

  • Band 1Joseph McArthur KC
    Band 1Joseph McArthur KC

    Joseph McArthur KC

    Joseph McArthur is a respected arbitration lawyer based in the Vancouver office of Blake, Cassels & Graydon. He has substantial experience representing clients in commercial disputes and appearing as an advocate in cases relating to construction, mining and energy.
    • Joseph McArthur has very strong leadership skills.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 1Michael E Barrack
    Band 1Michael E Barrack

    Michael E Barrack

    Michael Barrack is one of the leading figures in Toronto's commercial litigation space. He is regularly instructed on high-profile and complex commercial mandates, including contested M&A, insolvency litigation and contractual disputes.

    • He is very knowledgeable and client-oriented.

      Disputes (International & Cross-Border) respondentGlobal
    • He got up to speed extremely quickly on very technical subject matter.

      Disputes (International & Cross-Border) respondentGlobal
    • He is a very strategic partner.

      Disputes (International & Cross-Border) respondentGlobal
    • Michael is one of the brightest litigators and is easy to talk to.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 2Abbey "Junior" Sirivar
    Band 2Abbey "Junior" Sirivar

    Abbey "Junior" Sirivar

    Junior Sirivar handles an impressive array of international arbitral proceedings arising in the natural resources and energy sectors, as well as domestic commercial disputes.

    • Junior was instrumental in ensuring the team were prepared for arbitration proceedings.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 2David V Tupper
    Band 2David V Tupper

    David V Tupper

    David Tupper is a partner based in Blakes' Calgary office. He is noted for his commercial arbitration practice, where he regularly acts for clients in the energy and construction disputes.

    • David is great to work with and obviously hugely experienced.

      Disputes (International & Cross-Border) respondentGlobal
    • David Tupper is a trial lawyer's trial lawyer. He is exceptional on cross-examinations and handling complex matters.

      Disputes (International & Cross-Border) respondentGlobal
    • David is a fantastic individual, with great personality and expertise.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 2Laura Cundari
    Band 2Laura Cundari

    Laura Cundari

    Laura Cundari is particularly noted for her expertise in complex arbitrations, including those in the energy, mining and construction sectors.
    • Laura is exceptionally talented in the international arbitration space.

      Disputes (International & Cross-Border) respondentGlobal
    • Laura is an exceptionally polished advocate and a highly skilled arbitrator and arbitration counsel.

      Disputes (International & Cross-Border) respondentGlobal
    • Laura Cundari is very impressive and is very effective in argument. She is very knowledgeable in the law and practice of arbitration.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 3Bradley E. Berg
    Band 3Bradley E. Berg

    Bradley E. Berg

    Bradley Berg is an accomplished commercial litigator who is additionally renowned for his work on constitutional cases.

    • He is very knowledgeable and is a model for the legal profession.

      Disputes (International & Cross-Border) respondentGlobal
    • He understands the environment that we work in and is proactive and practical.

      Disputes (International & Cross-Border) respondentGlobal
    • He provides top-tier advice.

      Disputes (International & Cross-Border) respondentGlobal
  • Band 3Iris Antonios
    Band 3Iris Antonios

    Iris Antonios

    Iris Antonios is held in high esteem for her international arbitration practice, advising on both treaty and commercial claims. She also offers expertise in enforcement and wider commercial litigation matters.

    • Iris Antonios is an excellent lawyer – she's thorough, pragmatic and helpful.

      Disputes (International & Cross-Border) respondentGlobal
    • Iris is very responsive and professional.

      Disputes (International & Cross-Border) respondentGlobal
    • Iris puts the time in to fully understand the facts and the industry as well as the applicable foreign law in multi-jurisdictional cases.She thinks and advocates strategically.

      Disputes (International & Cross-Border) respondentGlobal
    • Iris is exceptional counsel. She's extremely intelligent, hard-working and organised.

      Disputes (International & Cross-Border) respondentGlobal

Ranked Individuals at Blake, Cassels & Graydon LLP (8)

Canada

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership