Canada Judgment

Court of Appeal for Ontario

Tehama Group Inc. v. Pythian Services Inc.

On this page

Professional case brief

Research organized from the available case record

Source document

01

Holding and result

The application judge correctly found the arbitrator followed the parties' agreed procedure, did not breach natural justice, and that the arbitrator's lack of legal training did not justify a lower standard of procedural fairness; there was no reviewable error in those findings and the appeal is dismissed.

Court disposition

Appeal dismissed

Orders

  • Appeal dismissed; respondents awarded all-inclusive partial indemnity costs of $40,000

02

Material facts

Parties

Tehama Group Inc.

Applicant (appellant) Counsel: Michael Schafler, Chloe A. Snider and Ekin Cinar

Pythian Services Inc. and Pythian Services USA Inc.

Respondents (respondents) Counsel: Alan Merskey and Kate Byers

Amounts and remedies

  • Costs Awarded: CAD 40,000
  • Amount in Dispute: USD 10,000,000

03

Procedural history

  1. Posture

    Civil International Commercial Arbitration / Appeal to Court of Appeal From Superior Court Judgment on Application to Set Aside Arbitral Award

04

Questions and positions

Legal issues

Party arguments

Applicant
Tehama argued the arbitrator's process contravened the parties' arbitration agreement and violated natural justice by depriving Tehama of a proper opportunity to make submissions; further argued the application judge applied a lower standard of procedural fairness because the arbitrator was a chartered accountant rather than legally trained and sought to set aside the award under Article 34 of the UNCITRAL Model Law.
Respondent
Pythian submitted the arbitrator followed the process agreed by the parties, Tehama was not deprived of the right to make submissions, the arbitrator did not breach natural justice or base the award on a new theory, and the application judge correctly declined to set aside the award.

05

Court’s reasoning

  1. 01

    UNCITRAL Model Law; International Commercial Arbitration Act, 2017 (Schedule 2) S.O. 2017, c. 2, Sched. 5

    Grounds to set aside an arbitral award are governed by Article 34 of the UNCITRAL Model Law and implemented in domestic statute.

  2. 02

    Court of Appeal reasoning in this decision and principles of arbitration law

    Courts defer to the arbitrator's chosen procedure where it accords with the parties' agreement and does not breach principles of natural justice.

  3. 03

    Superior Court judgment (2025 ONSC 4134) and appellate review doctrine

    Appellate courts will not re-litigate factual findings open to the trial judge and will only interfere where there is a reviewable error.

06

Ratio, limits and disposition

Ratio decidendi

The application judge correctly found the arbitrator followed the parties' agreed procedure, did not breach natural justice, and that the arbitrator's lack of legal training did not justify a lower standard of procedural fairness; there was no reviewable error in those findings and the appeal is dismissed.

Obiter and limits

  • The choice of procedure was properly influenced by the nature of the dispute and the arbitrator's accounting expertise.
  • Even if a breach of natural justice had been found, the application judge would have exercised discretion not to set aside the award.

Court disposition

Appeal dismissed

  • Appeal dismissed; respondents awarded all-inclusive partial indemnity costs of $40,000

Source and reliance status

Court of Appeal for Ontario · 5 May 2026

This page organises the available record for research. Confirm quotations, current status, and subsequent treatment against the official source before relying on the case.

Judgment reading view

Judgment text

The complete available source text.

Source document

Court of Appeal for Ontario

Judgment· 5 May 2026

2026 ONCA 326

Tehama Group Inc. v. Pythian Services Inc. Collection Decisions of the Court of Appeal Date 2026-05-05 Neutral citation 2026 ONCA 326 Docket numbers COA-25-CV-1176 Judges George, Jonathon C.; Copeland, Jill M.; Gomery, Sally A. Subject Civil Decision Content

COURT OF APPEAL FOR ONTARIO CITATION: Tehama Group Inc. v. Pythian Services Inc., 2026 ONCA 326 DATE: 20260505 DOCKET: COA-25-CV-1176 George, Copeland and Gomery JJ.A.

BETWEEN Tehama Group Inc. Applicant (Appellant) and Pythian Services Inc. and Pythian Services USA Inc. Respondents (Respondents) Michael Schafler, Chloe A. Snider and Ekin Cinar, for the appellant Alan Merskey and Kate Byers, for the respondents Heard and rendered orally: April 24, 2026 On appeal from the judgment of Justice Jana Steele of the Superior Court of Justice, dated July 14, 2025, with reasons reported at 2025 ONSC 4134.

REASONS FOR DECISION [1] Tehama Group Inc. (“Tehama”) appeals the dismissal of its application to set aside an arbitral award under Article 34 of the UNCITRAL Model Law on International Commercial Arbitration,[1] set out in Schedule 2 to the International Commercial Arbitration Act, 2017, S.O. 2017, c. 2, Sched. 5. [2] The arbitrator, an accountant, was appointed by the parties to determine whether Tehama was entitled to receive an additional $10 million USD from the respondents (“Pythian”). The arbitration turned on the calculation of the adjusted EBITDA[2] of the business that Pythian acquired from Tehama in the year after closing. The arbitrator concluded that the earnings target that would oblige Pythian to make the additional post-closing payment to Tehama was not met. [3] In its application, Tehama alleged that the process followed by the arbitrator was contrary to the parties’ arbitration agreement or violated the principles of natural justice. The application judge rejected these allegations. She found that the arbitrator followed the process agreed upon by the parties; that Tehama was not deprived of a right to make submissions; that the arbitrator did not breach natural justice by not explicitly addressing two procedural objections raised by Tehama in the reasons for the final award; and that the arbitrator did not make the award based on a new theory not advanced by

Pythian. The application judge stated that, even if she had found any breach of natural justice, she would have exercised her discretion not to set aside the award. [4] In its appeal to this court, Tehama contends that the application judge erred in law by assessing the alleged breaches of natural justice on a lower standard of procedural fairness because the arbitrator was a chartered accountant as opposed to a person with legal training. [5] We disagree. The application judge set out the relevant principles governing her assessment of Tehama’s allegations. She then made a series of findings of fact based on her interpretation of the parties’ arbitration agreement and the application record. Her reasons, read as a whole, do not show that the arbitrator’s lack of legal training drove her analysis. She repeatedly found that the arbitrator complied with the process that the parties had agreed upon. She observed that the choice of process was undoubtedly informed by the nature of the parties’ dispute and the arbitrator’s expertise. This does not mean that she held the arbitrator to a lower standard of procedural fairness. [6] We do not find any reviewable error in the application judge’s reasons. Tehama is seeking to re-litigate findings of fact that were open to the application judge to make on the record. [7] The appeal is dismissed, with all-inclusive partial indemnity costs of $40,000 to the respondents. “J. George J.A.” “J. Copeland J.A.” “S. Gomery J.A.” [1] Adopted by the United Nations Commission on International Trade Law on June 21, 1985, and as amended on July 7, 2006. [2] Earnings before interest, tax, depreciation and amortization.

Source wording is retained. Consult the source document for its original formatting and pagination.

Authorities

Authorities used by the court

Cases, legislation, regulations, and constitutional provisions identified in the available record.

Tehama Group Inc. v. Pythian Services Inc., 2026 ONCA 326

Case cited

Tehama Group Inc. v. Pythian Services Inc., 2025 ONSC 4134 (Steele J.)

Case cited

UNCITRAL Model Law on International Commercial Arbitration, Article 34

Legislation

Legislation referenced in the available case record.

International Commercial Arbitration Act, 2017, S.O. 2017, c. 2, Schedule 5

Legislation

Legislation referenced in the available case record.

Case-aware research

Ask AI about this case

The judgment and available research above are public. New questions open in a separate private conversation grounded in this case.

About this LexChat collection

This page organizes the available case record for research. Verify quotations, current status, and subsequent treatment against the source document. Corrections can be reported to hello@esheria.ai.

Legal information, not legal advice. Research summaries do not replace the judgment.