Working under limited supervision, the Senior RCT plans, performs, and leads complex radiological surveys; provides day‑to‑day field coverage for demolition and remediation activities; and ensures radiological controls are effectively implemented in accordance with 10 CFR 835, site Radiation Protection Programs, Radiological Work Permits (RWPs), and project‑specific requirements. APTIM is seeking an experienced Senior Radiological Control Technician (Senior RCT) to support Department of Energy (DOE) decontamination, decommissioning, and remediation (DD&R) radiological field operations at the Naval Nuclear Laboratory (NNL) – Bettis Laboratory Site in West Mifflin, Pennsylvania.