Patrick Prézeau Stephenson Executive Biography

 

Patrick Prézeau Stephenson

Senior Regulatory Scientist | Regulatory Lead, Crop Protection

One-line value A 25+ year bridge between crop science and PMRA registration, Patrick converts complex data and policy into predictable approvals, resilient stewardship, and efficient cost‑to‑market.

Profile Patrick Prézeau Stephenson is a senior regulatory scientist with more than 25 years at the intersection of phytopathology/epidemiology and Canadian pesticide regulation. He leads PS‑Consults.com (Ottawa), advising innovators and post‑patent manufacturers on end‑to‑end PMRA strategy—equivalency, TGAI/EUP dossiers, PPIP negotiation, bilingual labels/SDS, stewardship, and launch readiness. He is known for translating complex science into practical pathways that deliver approvals on time and within budget.

Experience highlights

  • Health Canada (PMRA), Senior Scientific Evaluator: Led regulatory reviews and risk assessments underpinning registrations, re‑evaluations, and special reviews across multiple AIs/EUPs.
  • PS‑Consults.com (2014–present): Regulatory Lead for Canadian market entry and lifecycle management—portfolio triage, filing calendars, data‑reliance strategy, and commercialization enablement.
  • NAFTA PCT initiative: Led development of statistical methods to forecast crop treatment percentages in collaboration with the US EPA Biological and Economic Analysis Division (BEAD). Washington.
  • Decision tools: Built a Socio‑Economic Resource Database and EcoPheno software to pair scientific rigour with field‑ready impact.
  • Instrumental in building North American and Canadian pesticide‑usage databases, developing custom Shiny applications, and deploying AI‑enabled agents.


Expertise

  • PMRA regulatory strategy
  • Crop protection market entry
  • Phytopathology and epidemiology
  • PPIP data compensation
  • Equivalency and waivers
  • Risk assessment and re‑evaluation
  • Bilingual labels and SDS
  • Cost‑to‑market efficiency
  • Commercialization and launch readiness
  • Stakeholder and executive engagement
  • Stewardship and incident management
  • Canadian agrochemical compliance


Selected results

  • Accelerated first‑cycle approvals via complete, bilingual submissions and clear PPIP reliance strategies.
  • De‑risked launches with stewardship programs, incident SOPs, and distributor readiness.
  • Reduced cost‑to‑market by replacing duplicative studies with equivalency/waivers and negotiated data access.

Recognition

  • McGill University —Several Awards, Dean's Honour List
  • London Life Top Rookie career distinction as a financial advisor and a Mutual Funds broker
  • Health Canada's–PMRA 10‑Year Long Service Award

Leadership and community

  • Elected Executive to the Professional Institute of the Public Service of Canada (PIPSC): Science & Patent SP group representing>3,000 federal scientists in the National Capital Region (NCR).
  • Fondation des anciens St‑Louisiens du Canada (FASC) & STO International: Executive  Boards, including the STO International Funds LLC.

Education

  • McGill University (Montreal) — Phytopathology/Epidemiology (Dean’s Honour List)
Scientific Publications
  • Several publications in peer-reviewed journals,
  • Published and unpublished regulatory assessments, reviews, and proprietary works on science,  policy, and practice.
Literary Publications (selected)
  • The Empress’s Pearl
  • La Perle de l'Impératrice
  • La Saga des Pescay
  • 45 Ans d'Engagement: L'histoire de la Fondation STO (in print)
  • 45 ans d’engagement

Contact

  • Ottawa, Canada • ps-consults.com
  • Email/Phone available upon request

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