After a few calls with the hiring manager, I eventually had a number of phone interviews with other people in the organization - other Solutions Architects, VPs of Sales, and executive staff. Interviews ranged from technical to behavioral but were generally informal. All interviews were scheduled via a scheduling person I didn't deal with otherwise (but seemed to be involved in HR paperwork and similar functions). After the interview process, a wrap-up call with the hiring manager took place, followed by a discussion with HR.