Talks given abroad

• 2008, Representability of split extension functor in categories of crossed modules of generalized Lie algebras, International Conference in Category Theory 2008, Calais, France.
• 2010, Pullback functors between points and internal homology and cohomology, International Conference in Category Theory 2010, Genova, Italy.
• 2011, Algebraically closed categories, Category Theory Seminar, University of Louvain-la-Neuve - Vrije Universiteit Brussels, Belgium.
• 2012, Normalizers, centralizers and action representability in semi-abelian categories, Workshop in category theory, University of Coimbra, Coimbra, Portugal.
• 2012, Normalizers and Algebraic Exponentiation, CMUC Category Theory Seminar, University of Coimbra, Coimbra, Portugal.
• 2013, Action representability and normalizers, International Conference in Category Theory 2013, Macquarie University, Sydney, Australia.
• 2014, Higher order conditions in categorical algebra, Category Theory Seminar, University of Louvain-la-Neuve - Vrije Universiteit Brussels, Belgium.
• 2015, Normalizers, centralizers and action accessibility, CatAlg2015 3rd Workshop on Categorical Algebra: Recent developments and future perspectives, Gargnano, Italy.
• 2018, Algebraic exponentiation and abstract categrories of interest, International Conference in Category Theory 2018, Ponta Delgada, Portugal.
• 2019, On the representability of actions of the category of internal categories of a semi-abelian category, PSSL 105 105th Peripatetic Seminar on Sheaves and Logic, Palermo, Italy.

Talks given in South Africa

• 2007, Split extensions in the category of rings, 50th South African Mathematical Congress, University of Cape Town.
• 2008, Representability of the split extension functor for categories of generalized Lie algebras, International Max Kelly Conference in Category Theory, University of Cape Town.
• 2008, Representability of split extension functor in categories of crossed modules of generalized Lie algebras, 51st South African Mathematical Congress, University of KwaZulu-Natal.
• 2009, Work in progress about homology and cohomology in semi-abelian categories, , Workshop in categorical algebra: Protomodular categories and related topics, Stellenbosch University.
• 2009, Homology and cohomology for semi-abelian categories, 52nd South African Mathematical Congress, University of Johannesburg.
• 2011, Algebraic exponentiation and centralizers in general categories, BBFest 2011, University of Cape Town. 2012, Normalizers, centralizers and action accessibility, , Categories in Algebra, Stellenbosch University.
• 2012, An introduction to algebraic exponentiation, , Colloquium Talk, Stellenbosch University.
• 2012, Normalizers and action representability, 55th South African Mathematical Congress, Stellenbosch University.
• 2013, Distributivity of the Huq commutator over finite joins, South African Category Theory Days 1 and 2, Stellenbosch University and the University of Cape Town.
• 2014, Normalizers and action representability II, 57th South African Mathematical Congress, University of South Africa.
• 2016, Duality for internal object actions, ATC 2016, University of Cape Town.
• 2016, On the existence of normalizers and centralizers in categories of internal algebras in cartesian closed categories, 59th South African Mathematical Congress, University of the Western Cape.
• 2017, On the existence of normalizers for internal algebras in cartesian closed categories as well as in the category of topological spaces, South African Category Theory Days, Stellenbosch University.
• 2017, On the nilpotency of extensions of nilpotent objects in algebraically coherent semi-abelian categories, 60th South African Mathematical Congress, North-West University.
• 2018, Objects with large nilpotent subobjects, Mathematical structures research week, University of Cape Town.
• 2018, On categorical algebraic properties of the category of Heyting semi-lattices, 61st South African Mathematical Congress, Rhodes University.
• 2019, Split extension classifiers of perfect objects, Categorical structures in algebra, toplogy and logic, Stellenbosch University.
• 2019, Categorical algebraic properties of the category with objects frames and morphisms binary meet and arbitrary join preserving maps, 612nd South African Mathematical Congress, University of Cape Town.
• 2021, (online) The first cohomology object in semi-abelian categories, Centre for Mathematics, University of Coimbra. Algebra, Logic and Topology Seminar (CMUC)
• 2021, (online) On the category of pointed frames, 64th South African Mathematical Congress, University of Free State.
• 2022, (online) On categorical conditions in the semi-abelian context, Centre for Mathematics, University of Coimbra. Algebra, Logic and Topology Seminar (CMUC)
• 2022, (online) On the relationship between action accessible and weakly action representable categories, Conference on Topology, Algebra and Category Theory, Unisa.