COLSA is seeking an experienced and proactive Infrastructure Support Engineer to provide enterprise-level support across system administration, virtualization, network operations, and cybersecurity compliance. This position is part of a high-performing team responsible for maintaining core IT infrastructure, enabling secure and efficient operations across mission-critical environments. This role involves hands-on management of systems and networks, ensuring identity and access controls, supporting information system security accreditation, and developing automation to enhance system performance and reliability. Ideal candidates will bring a blend of technical expertise, security awareness, and the ability to thrive in complex enterprise environments. Primary Responsibilities: + Administer and support enterprise Windows Server and Active Directory environments. + Manage and maintain VMware vSphere 7 infrastructure. + Operate Cisco-based network systems and provide troubleshooting and optimization support. + Oversee physical infrastructure and hardware lifecycle, including Dell servers and SAN storage platforms. + Support system identity, authentication, and access management functions. + Participate in the preparation, maintenance, and submission of documentation required to achieve and maintain system authorization. + Apply automation to improve system deployment, monitoring, and maintenance. + Evaluate and document technical and security controls in alignment with NIST 800-53. + Utilize GRC tools (e.g., RiskVision, Xacta, JCAM) to support ongoing risk and compliance tracking. + Collaborate with cybersecurity professionals to maintain compliance with federal regulations and internal security policies. *Contingent upon funding and selection At COLSA, people are our most valuable resource and centered at our core value. We invite you to unite your talents with opportunity and be a part of our “Family of Professionals!” Learn about our employee-centric culture and benefits here (https://www.colsa.com/culture\_benefits/) . Required SkillsRequired Experience Required Qualifications: One of the following combinations of education/experience: + + Bachelor's degree or higher in related field and 10 years related experience in enterprise infrastructure support, systems administration, or a related role OR + High school diploma and 18 years related experience in enterprise infrastructure support, systems administration, or a related role. + Strong technical background in: + Microsoft Windows Server and Active Directory + NIST 800 series publications and FISMA-related compliance activities + Practical experience supporting security authorization or accreditation activities. + Understanding of enterprise system and network architectures. + Ability to document technical processes and communicate effectively with both technical and non-technical stakeholders. + TS/SCI Clearance; US Citizenship required. Preferred Qualifications: + Experience with: + VMware vSphere 7 administration + Cisco network systems + Dell server hardware and SAN storage management + Automation and scripting for system tasks + GRC tools such as RiskVision, Xacta, or JCAM + Familiarity with the ATO lifecycle, including control implementation and evidence generation. Applicant selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. COLSA Corporation is an Equal Opportunity Employer, Minorities/Females/Veterans/Disabled. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.