**ManTech** is seeking a highly skilled and knowledgeable **Infrastructure Engineering Lead.** This position is located on customer site in **Huntsville, AL.** The **Infrastructure Engineering Lead** is responsible for maintaining system administration, identity and authentication, information system security accreditation, data storage and backup, physical infrastructure maintenance, and automation development, as well as system security and environment ATOs. **Responsibilities include but are not limited to:** + Accountable for system administration, identity and authentication, information system security accreditation, data storage and backup, physical infrastructure maintenance, and automation development. + Ensure O&M best practices are adhered to for client cloud and on-premises environments, systems, applications, and tools. + Enhance system operations through the design, development, and sustainment of new and existing system functionality to support configuration management, automated building, automated testing, automated deployment, and automated monitoring and notification. + Design, implement, and support the Networking Infrastructure within and between data centers. + Provision/configure the required software onto servers, such as web servers and databases. + Evaluate, improve, and maintain the security of the infrastructure and customer environment. + Build new baselines with the appropriate security and access controls to include DISA STIGS and required security controls; develop and maintain security documentation for ATOs of the environment. + Create and maintain network infrastructure for both bare-metal and virtual machines with the appropriate LAN, WAN, vLAN, SDN, firewall and load balancer configurations, using both OEM and third-party tools that include virtual network tools (NSX) and services. + Monitor and correct network issues and create recovery processes for failures and performance bottlenecks. Provide real time alerts for network problem issues and implement proactive solutions for future problems to include re-design or tech refresh. + Monitor and test application performance for potential bottlenecks, identify solutions and work with developers to implement those fixes. + Maintain security, backup, and redundancy strategies. + Develop and maintain custom scripts to increase system efficiency and increase automation of tasks. Provide real time reporting of provisioned and non-provisioned resources such as bandwidth utilized to include performance metrics for availability, performance, and trends. **Minimum Qualifications:** + Bachelor’s degree, preferably in IT, Engineering, Computer Science, Mathematics, or related discipline. + 10+ years of IT experience with 3+ years leading a team of infrastructure engineers and administrators. + 5+ years of hands-on experience with MS Windows OS and MS AD. + 3+ years of hands-on experience with NIST 800x special publications (e.g. NIST SP 800-53, NIST SP 800-37), FISMA and RMF guidelines. + Hands-on experience with DNS, DHCP, LDAP, SMTP, and NTP. + Possess either a Cisco Certified Network Professional (CCNP) certification or Microsoft Windows Server Hybrid Administrator Associate certification. **Preferred Qualifications:** + Experience with system accreditation and authorization (A&A/ATO) process. + Experience with GRC tools (RiskVision, Xacta and JCAM). + Experience with VMWare vSphere 7. + Cisco Network experience. + Dell Server experience. + Dell SAN Storage hardware experience. + Preferred certifications: VMware Data Center Virtualization (VCP-DCV), Certified Information Systems Security Professional (CISSP). **Security Clearance Requirements:** + Must possess an active Top Secret security clearance ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.