This program profile describes recent changes to the process for preparing graduate teaching instructors (GTAs) in North Carolina State University's first-year writing program. The authors--one a nontenure-track faculty member and the other a tenure-track faculty member--describe the philosophical, ethical, and practical concerns in scaling teacher preparation to accommodate rapidly growing cohorts of MA and MFA GTAs. By providing an example of cross-tier collaboration, the authors propose an approach to GTA preparation that takes into account that many of these novice teachers will begin their teaching careers as contingent faculty colleagues.