Birchtech names Michael Mioska as CFO, replacing fractional CFO Fiona Fitzmaurice
Birchtech Corp. said Fiona Fitzmaurice stopped serving as Chief Financial Officer on May 1, 2026, after the company gave notice, and that the decision did not stem from any disagreement. Michael Mioska, a Chartered Professional Accountant, was appointed CFO effective the same day, and the CEO and COO signed extended employment agreements that run through May 31, 2030.
Key points
- Michael Mioska appointed CFO effective May 1, 2026; his compensation terms are not yet finalized and will be disclosed later.
- Fiona Fitzmaurice ceased as CFO on May 1, 2026; she had served under a fractional CFO agreement dated November 1, 2023.
- Richard MacPherson's employment term extended to May 31, 2030, with a $1,000,000 base salary and a $500,000 cash retention bonus.
- James Trettel named Chief Operating Officer on May 1, 2026, with a $600,000 base salary and a $250,000 cash retention bonus.
The filing
Written by AI on Nov 9, 2026, 8:51 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on May 06, 2026.
Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.