I'm looking for a photograph of Derek John Whitcombe - principal of
Leader Real Estate in Canberra. Preferably taken in the last two
years. Is this the sort of thing you can help with? Do you need more
information?

A quick Google search for the company finds this directory:

http://allhomes.com.au/c/ah?a=tos

which lists phone numbers and two email addresses for Leader Real
Estate.  The domain of the email addresses turns out to be Leader Real
Estate's website http://leader.com.au, but it doesn't have any
pictures of Whitcombe yet.  You might consider contacting the company
in order to get a picture.

I can't go the company for a photograph for personal reasons. If I
have to explain I can.