Sustaining hardened infrastructure is essential to mission assurance and long-term facility performance. Our HM/HS services include both field-level and depot-level maintenance activities such as non-destructive testing, corrosion mitigation, predictive diagnostics, and refurbishment of shielding components. We also deploy portable surveillance test systems to validate shielding effectiveness and system integrity without interrupting operations. This proactive sustainment approach helps extend the service life of high-value assets and ensures continued compliance with protection standards.