IT Systems Engineer 3 - Falls Church, VA

About M.C. Dean M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber-physical solutions for the nation’s most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 7,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration. Position Overview We are seeking an IT‑oriented System Engineer 3 to join our Security and Electronic Systems (SES) business unit. The role focuses on design, implementation, operations, maintenance, and cybersecurity of large, complex, resilient hardware and virtualized infrastructure. Responsibilities Work closely with stakeholders to gather technical requirements, architect solutions, and execute on deliverables. Communicate solutions to the technical program team and end‑customer stakeholders. Conduct analysis, engineering, and implementation of system improvements, automation, optimization, and deployments. Develop designs and architectural changes to infrastructure environments, including drawings, engineering design plans, implementation plans, transition plans, test plans, and failover plans. Perform security updates to hardware and software to maintain a strong security posture across all systems. Qualifications U.S. Citizen with adjudicated U.S. Secret Clearance. Bachelor's Degree and 5+ years of progressive experience in Computer Science, Electrical Engineering, Mechanical Engineering, or a related Engineering/IT discipline. Experience eliciting requirements, researching, designing, testing, and implementing hardware and software solutions for virtual infrastructure technologies. Engineering experience with core platforms and services including VMware ESXi/vSphere, Microsoft Windows Server, Microsoft Windows 11, DNS/DFS/DHCP, WSUS/KMS, Active Directory, Group Policy, Microsoft Endpoint Configuration Manager. Experience performing security scans, applying security configurations such as DISA STIG/SRGs to system hardware and software. Experience virtualizing enterprise applications such as Active Directory, MS SQL, RHEL, MS SharePoint. Experience with API management and scripting languages including PowerShell, Python, JSON, Bash. Meeting DoD 8570 IAT Level‑II requirements. Demonstrated background working with multidisciplinary teams. Strong time‑management, organization, and communication skills. Strong MS Excel, Word, PowerPoint, and Visio skills. Desired / Advantageous Qualifications Experience administering OCSP (e.g., Axway Validation Authority, Microsoft OCSP Responder). Experience troubleshooting and optimizing Trellix security product suite (Endpoint Security, DLP, HIPS, etc.). Experience designing and deploying SQL Database Infrastructure (Microsoft SQL Server). Experience engineering and implementing platforms and services in a software‑defined network environment. Vendor certifications such as VMware, Cisco, Microsoft, NetApp. Additional Requirements Full‑time position. Work Type: Full‑time. Meet DoD 8570 IAT Level‑II requirements. #J-18808-Ljbffr M.C. Dean, Inc.