The first job I had after uni it took about a year or so for the comments and questions to die down, eventually (being quite a small company) I could sit in the brew room after my ride in still wearing cycling tights and people would just accept it.
When I changed jobs (same industry though) it took me ages to get work to put in a bike shed (comments of "can't you just put a plastic bag over the saddle?" showed their lack of understanding) and even after 2 years people would still ask "HOW far?!" when I told them it was an 8 mile commute. Constant comments about cyclists not paying road tax, holding up the traffic, why didn't I just drive blah blah. Some of it was deliberate winding up, some of it was total lack of comprehension about how anyone would want to go and ride a bike when they had a perfectly serviceable car.
My current job has a secure indoors cycle storage area with workshop, showers, changing rooms with drying facilities, most staff ride to work and various Gold medal winning Olympic cyclists swanning ahout the place. 😉