PKI Engineer

Castellum Inc seeks a PKI Engineer within our Defense & Aerospace-focused IT & Cybersecurity team. You will design, implement, and manage enterprise PKI services securing classified and mission-critical environments. Responsibilities include CA/RA administration, certificate policy/CP-CPS development, key lifecycle management, TLS/SSL integration, and HSM operations. Collaborate with cybersecurity, network, and application teams to enforce cryptographic standards, support audits, and resolve certificate incidents. Castellum offers a dynamic, inclusive culture focused on innovation in defense tech and professional growth.