Hello there.
I also grow orchids in my office. I have Phals and Oncidiums. Both types grow quite well, actually. I used to have an east facing window that got a lot of light (I'm on the 17th floor of the building). Honestly, my office got too much light after 10am or so. So, I used to partly close the blinds.
Now I'm in an office with a north facing window and I never close the blinds. I get indirect sunlight all day long (let's see during the summer). I water my plants 1-2 per week. I do spray/mist once a week, but I don't have any special lighting ( I'm a lawyer in a federal agency, so I can't have any special lighting or accessories for plants). I do make sure to fertilize, fertilize, fertilize. I use MSU plus superthrive, once a week. I mix the solution at home and take it to work, as I don't have the time nor the place to be mixing chemicals.
I pot all my orchids in plastic see through pots, which are inside ceramic orchid pots. I have many more orchids at home, but I rotate them once in a while when the ones in the office need special care, repotting, or if some other orchid that I have at home is about to bloom.
I used to have a cattleya. It was beautifully healthy and green but it only bloomed once. I brought that home and I think it got sunburn.
I currently have a huge white phalaenopsis noid that has been in bloom for about a month and keeps growing buds, a mini phal noid that is neon purple, an oncidium sharry baby and an oncidium twinkle. The twinkle is bursting out of its pot and is FULL of blooms. It smells wonderful!! The sharry baby was in bloom for about 2 months. I took that home, repotted it and took it back to the office.
Good luck and don't hesitate to take orchids to the office. I think you just have to be a little bit organized about taking care of them. But it's definitely doable.