Fair housing - legal to rent only to a certain profession?

[JD Krashovic]

Specific question regarding fair housing. Let's say I work as a doctor in a local hospital and I decide to start investing in real estate. I purchase a duplex that is near my hospital with the idea that it would be perfect for someone who also works at that hospital. Can I market and rent only to people that work at the hospital? Can I make "working at the hospital" a requirement for renting my property?