CyberSecurity Engineer III

This position requires an ACTIVE DoD security clearance. Applicants who do not currently hold an active clearance will not be considered. This is a remote position, United States. At PMAT, we work on mission critical systems that directly support the warfighter, designing, building, and securing modern digital capabilities across cloud, data, and software environments. Our teams tackle complex, real-world challenges where delivery matters more than theory, and innovation is driven by curiosity, collaboration, and purpose. In this role, you’ll contribute to secure infrastructure and cybersecurity capabilities supporting government and Intelligence Community mission environments, working alongside engineers and operators to deliver resilient, forward-leaning solutions in support of national defense. About the role: PMAT is seeking a CyberSecurity Engineer III to support the design, deployment, security, administration, and sustainment of Secret and Top Secret mission-critical environments supporting government and Intelligence Community customers. In this role, you will work across on-premises cloud, virtualization, Linux and Windows systems, network infrastructure, automation, and compliance-driven security architectures. You will collaborate with infrastructure, cybersecurity, engineering, and mission stakeholders to maintain secure and reliable environments, resolve technical challenges, remediate vulnerabilities, and support systems throughout the development, accreditation, and operational lifecycle. Responsibilities: Support the design and administration of secure Secret and Top Secret infrastructure stacks in on-premises and private cloud environments. Support the design and administration of large-scale VMware ESXi and vSAN virtualization platforms. Deploy, configure, administer, and maintain RHEL 6/7/8 and Windows Server 2019/2022 systems. Implement and remediate security controls in accordance with NIST SP 800-53 Revision 4 and Revision 5 requirements and DI