- Ontario Combinatorics Workshop, University of Ottawa, May 2023, plenary speaker, "Strong and skew frame starters"
- 9th Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM 2023),
Winnipeg, June 2023, invited speaker in the minisymposium on Design Theory and Coding Theory.
- Selected Areas in Cryptography 2023, Fredericton, NB, August 2023, I gave the Stafford Tavares Lecture, which is a one-hour invited talk, "Robust and non-malleable threshold schemes,
AMD codes and external difference families"
- CRM / UOttawa distinguished colloquium, November 22, 2023.
- I was a co-organizer and speaker in the session on Combinatorial Design Theory at the CMS Winter 2023 Meeting in Montreal, which was held from Dec. 1-4, 2023, "Circular external difference families, graceful labellings and cyclotomy"
- 55th Southeastern International Conference on Combinatorics, Graph Theory & Computing, Florida Atlantic University, March 2024, plenary speaker, "A compendium of difference families".
- CMS Winter Meeting, December 2024, Richmond, BC, invited speaker in the session on
Combinatorial Designs, "Recent results on near-factorizations of groups".
- 10th Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM 2025),
Ottawa, May 2025, invited speaker in two minisymposiums:
- How Many? The Art and Craft of Counting, "Some classic inequalities in design theory and
coding theory"; and
- Combinatorial Designs and Graph Decompositions, "λ-fold near-factorizations of groups".
- Selected Areas in Cryptography (SAC 2025) Summer School, Toronto, August 2025, 2¾ hour invited tutorial on post-quantum cryptography.
- Birkbeck, University of London, October 2025, colloquium talk, "The long and winding road:
from robust threshold schemes to difference
families to near-factorizations of groups".
- CMS Summer Meeting, June 2026, Saint John, NB, invited speaker in the session on Combinatorial Design Theory, "Optimal equidistant codes--a detective story".
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