Can we put profile picture other than the gravatar one at careers.stackoverflow.com?
I am able to remove my gravatar picture but I am not sure if I am able to upload a new one.
What I would do is add a new e-mail address to Gravatar specifically for Careers and attach a new picture to that.
No need for a new e-mail account. You should be able to just do this: Instead of
firstname.lastname@example.org create an e-mail address within Gravatar
email@example.com. This is what I do to make my Gravatar at Android Enthusiasts different than my Gravatar for the rest of the Stack Exchange network.
Unless your e-mail provider has hosed it, any messages sent to that address should get delivered to
firstname.lastname@example.org. (I use Gmail and it works great.)
A side effect is that you can create an e-mail filter keyed off of the
+careers (or whatever string you use) so that you can treat such messages differently.
(This "plus-address" comes from IETF RFC 5233, which refers to it as "sub-addressing" and it's been around for ages. That some e-mail providers have chosen to break it is a different issue. See also: http://en.wikipedia.org/wiki/Email_address#Address_tags.)