Talk to the person directly or schedule an appointment by phone.
Employers these days are very busy with paperwork and whatnot, and they don't check their email as frequently as you think they would. So if you were to send your resume through email and asked for job employment, it'll get delayed because they won't read your email the instant you send it.
If you were to schedule an appointment by phone with a receptionist, you'll have the exact time, date, and location for the interview. Likewise, by talking to the receptionist directly, you will also immediately schedule an appointment for an interview right then and there.