Some talks 2021-2023:

• "112 years for the proof of one theorem", 7th Biennial International Group Theory Conference an der North-West University, Potchefstroom, South Africa, August 2023.
  
• Joint talk about the history of the CFSG with Atle Höhne and Volker Remmert in the history seminar of the BU Wuppertal, April 2023.
  
• "Stories about symmetry" at the Alexander von Humboldt meeting at the Deakin University in Geelong, Australia, November 2022.
  
• Lectures "Permutation groups acting under constraints" and "Backtrack search and canonical images" at the Young Group Theorists Workshop (Les Diablerets, Switzerland), September 2022.
  
• "Refine, Rip, Repeat - Search in permutation groups". Talk at the Workshop "Computational Group Theory" in Oberwolfach, August 2021.
  

In 2020 I gave numerous virtual talks (Algebra Seminar of the University of Birmingham, ICMS, Seminar at the University of Namibia). In 2021 the talks have also been mostly virtual, e.g. at the Minisymposium "Graphs and Groups, Geometries and GAP" (G2G2-MS) at the European Congress of Mathematics in July 2021.

2019:

• "How we search for symmetry by breaking it", joint talk with Wilf Wilson at the Forum Experiment! in Hannover, 27th November 2019.
• "Isolated elements in finite groups" at the conference "Group Theory in Berlin" in Berlin, 20th September 2019.
• "Groups acting with low fixity: status and plans" at "Groups and representations: A conference in memory of Kay Magaard" in Warwick (UK), 11th September 2019.
• "Towards a Z*_p-Theorem", at the Workshop "Groups and Geometries" in Banff (Canada), 27th August 2019.
• Spotlight Lecture "One question, two perspectives, three projects" at the summer school "Modern theory of group actions and the special role of finite simple groups", Institut Mittag-Leffler (Stockholm), 6th June 2019.
• Plenary talk "Kanonische Bilder" at a computer algebra conference in Kassel, 18th May 2019.

2018:

• "The four fixed points project" at the Northern German Group Theory Colloquium in Braunschweig, 29th June 2018.

There is an archive of all talks before 2018, in German.

Workshops etc. since 2018:

2023:

• "Young Group Theorists Meeting 2023" in Kiel.
• "HaJe MaDre 2023" in Halle.
• 7th Biennial International Group Theory Conference at the North-West University, Potchefstroom, South Africa.

2022:

• "Young Group Theorists Meeting 2022", virtual meeting.
• "Simple groups, representations and applications" at the Isaac Newton Institute in Cambridge, July 2022.
• Young Group Theorists Workshop in Les Diablerets, Switzerland.
• Alexander von Humboldt Meeting (Australia/New Zealand) at the Deakin University in Geelong, Australien.
• Nikolaus Conference in Aachen.

Everything but the "Young Group Theorists Meeting 2020" and the workshop in Cambridge was virtual: ICMS 2020 with our session "Groups and group actions", the "Young Group Theorists Meeting 2021", the European Congress of Mathematics 2021, the Northern German Group Theory Colloquium 2021.


2019: In addition to the talks mentioned above, I was involved in the following (Co-Organiser):
The EWM Conference in Leipzig (German Chapter), the Summer School on Finite Groups and Related Geometrical Structures in Venice, the Summer School "Constructive Matrix Group Recognition in GAP" in Aachen, the Northern German Group Theory Colloquium in Halle, the GAP days in Halle and the Young Group Theorists Meeting in Gießen.
2018: In addition to the talks mentioned above, I went to the following meetings:
Nikolaus Conference in Aachen, Young Group Theorists Meeting in Halle.
There is an archive with earlier workshop, conferences etc., in German.

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