I am the Graduate Chair for the Department of Mathematics, and am a Managing Editor of Homology, Homotopy and Applications.
My papers, preprints and talks.
Contact information is below.
Research 
My research interests include algebraic topology
(especially stable homotopy theory and model categories),
homotopy type theory and univalent foundations,
derived categories,
modular representation theory,
mathematical physics (quantum gravity),
algebraic and scientific computation,
and category theory (especially higher categories).
My papers, preprints and talks. Research groupDan Christensen (faculty)Zach Lindsey (postdoc, Sept 2018 until present) Marco Vergura (Ph.D. student, Sept 2015 until present) Luis Scoccola (Ph.D. student, Sept 2016 until present) 
What's this? 
Chris Kapulkin and I are running the Homotopy Type Theory Electronic Seminar Talks.
I encourage eligible people apply for an NSERC Postdoctoral Fellowship, an NSERC Banting Postdoctoral Fellowship (domestic and international applicants eligible), any other NSERC postdoc, an NSF PDF (e.g. a International Research Fellowship Program postdoc, or a Mathematical Sciences Postdoctoral Research Fellowships or a Distinguished International Postdoctoral Research Fellowship), or similar to be held at Western.
The Canadian Government has many scholarships and fellowships that are available for people from many different countries.
Recent Teaching 
Summer 2018  Representation Theory, Math 9140a. 
Winter 2018  Algebraic Topology, Math 4152b/9052b. 
Summer 2017  Mathematical Computation, Math 9171a. 
Other 
SAGE is a wonderful program which interfaces to Magma, Maple, Mathematica and MATLAB, and the free programs Axiom, GAP, GP/PARI, Macaulay2, Maxima, Octave, and Singular. It is freely available and open source. If you find math fun, consider becoming a math major. Talk to me or anyone else in the department if you're curious. Here are some photos from trips I have been on. I'm on Google+. 

Contact information 
Dan Christensen
Department of Mathematics
The University of Western Ontario
London, Ontario N6A 5B7
Canada
Office: MC130
Office phone: (519) 6612111 x86530
Fax: (519) 6613610 (include my full name)