Some talks with slides:

[Jan 2017] Conformal Patterson–Walker metrics and Fefferman–Graham ambient spaces(Beamer Slides),
37th Winter School Geometry and Physics, Srní

[Nov 2016] Fefferman–Graham ambient spaces of conformal Patterson–Walker metrics (Beamer Slides),
Workshop "Conformal Geometry and Spectral Theory" at the Humboldt University in Berlin

[Sep 2016] Geometric overdetermined differential equations and holonomy (Beamer Slides),
Politecnico di Torino

[Jan 2016] Holography of BGG-Solutions. (Beamer Slides),
36th Winter School Geometry and Physics, Srní

[Feb 2015] Holonomy Reductions of Parabolic Geometries and Curved Orbit Decompositions (Beamer Slides),
Australian National University

[Dec 2014] A non-normal Fefferman-type construction: Holonomy-methods and characterization (Beamer Slides),
Equivalence, invariants, and symmetries of vector distributions and related structures : from Cartan to Tanaka and beyond, IHP Paris

[Jun 2014] A non-normal Fefferman-type construction of split-signature conformal structures admitting twistor spinors (Beamer Slides)
Workshop on Vector Distributions and Related Geometries, Banach Centre Warsaw.

[Aug 2012] Ambient and conformal geometry. (Beamer Slides)
Workshop on Conformal and CR geometry, Banff International Research Station (BIRS).

[Jan 2012] Recent progress on a non-normal Fefferman-type construction of split-signature conformal structures. (Beamer Slides),
32nd Winter School Geometry and Physics, Srni.

[Nov 2011] Fefferman-type constructions for parabolic geometries. (Beamer Slides)
Differential Geometry Seminar, University of Washington.

[Sep 2011] A non-normal Fefferman-type construction. (Beamer Slides),
The Geometry of Differential Equations, ANU, Canberra.

[Jul 2011] Holonomy reductions of Cartan connections. (Beamer Slides),
Cartan connections, geometry of homogeneous spaces, and dynamics, ESI Vienna.

[Jan 2011], 31st Winter School Geometry an Physics, Srni. Holonomy reductions of Cartan geometries. Beamer Slides

[Dec 2010 Geometric overdetermined systems and the BGG-machinery. (Beamer Slides),
Differentialgeometrieseminar Friedrich-Schiller Universität Jena.

[Aug 2010 Coupling solutions of BGG-equations in conformal spin geometry. (Beamer Slides)
Differential Geometry and Applications, Brno.

[Jan 2010] Holonomy reduction over singularity sets in conformal and projective geometry. (Beamer Slides)
30th Winter School Geometry an Physics, Srni.

[Sep 2009] Twistor spinors and generic rank two distributions in dimension five. (Beamer Slides)
Workshop on Dirac Operators, Rauischholzhausen.

[Aug 2009] Natural Prolongations of BGG-Operators. (Beamer Slides)
Thesis defense, University of Vienna.

[Jun 2009] Prolongations of conformally invariant overdetermined operators. (Beamer Slides)
Centre Ennio de Giorgi, Pisa.

[Jan 2009] Invariant Prolongation of Overdetermined Systems arising for Parabolic Geometries. (Beamer Slides)
Banach Centre, Warsaw.

[Aug 2008] Natural Prolongations of BGG Operators. (Beamer Slides)
University of Auckland, Workshop on "Parabolic Geometry and PDE".