My generic reply to headhunters. Feel free to fork and to edit it to your liking!
Dear Headhunter,
thank you for your message and the interest in my person.
Unfortunately, I’m very happy with my current job. My working
environment demands permanently for both, my mathematical
expertise and my various programming skills. Not only do I have
the privilege to collaborate with highly academic people on
challenging problems within extremely diverse project backgrounds,
but I also learn new things and educate myself every day!
Currently, I don’t see any reason why I should change anything on
my situation (although earning money is by far not the main criteria
for my personal employment-selection-process, be rest assured that I
get a decent amount of such). I promise you that once any of the
conditions stated above change, you are one of the first I will
get in touch with.
So long, stay tuned!
<your name>