The work involves replacing 21 exterior door assemblies, frames, hardware, access control components, and adjacent infill systems at building 635’s main level. New doors will be commercial-grade aluminum stile-and-rail with aluminum frames, factory-finished with powder coating to match existing colors. All work must comply with WBDG 08 11 16, manufacturer requirements, and UFC life-safety provisions. The contractor is responsible for all plant, labor, equipment, materials, supervision, and incidentals. No budget amounts or timelines are specified.