it
does take you out of the category of complete writing amateur, so i'd mention it, but keep it short and sweet... and, if your novel has anything to do with those occupations, it's definitely relevant...
btw, novels
are fiction, so it makes you seem pretty 'raw' to refer to a 'fiction novel'... get the lingo right and you'll sound more professional...
best of luck with your query... if you want an assessment of its chances, drop me a line and i'll be glad to look it over...
love and hugs, maia
maia3maia@hotmail.com