General information Requisition # R70619 Locations USA-MD-Laurel Posting Date 09/10/2026 Security Clearance Required TS/SCI w/ Poly Remote Type Onsite Time Type Full time Description & Requirements Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH! MANTECH is seeking a motivated, career-driven, and customer-focused Senior Systems Engineer to join our team in Laurel, MD . You will play a critical role in supporting the enterprise infrastructure capabilities for a global, mission-focused workforce. This position supports the high-visibility Enterprise Infrastructure Services (EIS) organization, responsible for the delivery and security of MPO's Enterprise Information Technology (EIT), the foundation for enterprise-wide services. As a Senior Network Engineer/Architect, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. Responsibilities include but are not limited to: Lead Engineer maintaining datacenters containing multi-domain, cross-platform networks. Responsible for utilization/standardization of all rack space and networking equipment to include, but not limited to, tracking location, asset details, operating systems, maintenance, planning retirement/consolidation and purchasing. Install, configure and support mobile cellular and wireless networks to include switches, routers, gateway or functional servers, to support requirements of the scope and scale consistent with campus or system wide networks Provide administration for VMWare ESXi servers, vCloud director, NetApp Storage, and Cellular/Wireless networks. Be able to design, implement and configure 2G, 3G, 4G/LTE Cellular Network Be able to install and implement network firewalls and provide testing support Manage Workstation and Server Environments to include remote connectivity, APC remote power, DNS, and account administration for Windows, Linux and Ubuntu. Leading medium to large complex projects and major phases of very large projects

Minimum Qualifications:

Bachelor's degree with 12+ years of experience OR associate's degree with 15 years OR 20 years (no degree requirement) of relevant Systems Engineer experience IAM II certification (DoD 8140 required upon start of employment.

Acceptable certifications include:

CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/SSCP) Working knowledge of: VMWare

• vCenter, ESXi, VSAN, NSX NetApp
• Cluster, SAN Networking
• Firewall, Switches, Wireless, Operating Systems
• Linux, Windows, Mac OSX Wireless Familiar with data center power, space and cooling design and configuration Familiar with

STE/STN Preferred Qualifications:

Ability to coordinate and integrate the efforts of other IT professional staff, including contractors, for efforts of varying size and complexity, including operational services by carriers and long-term contract service providers. Based on program and technical requirements, can evaluate and recommend appropriate hardware, software and services solutions. Ability to investigate techniques and strategies utilized by other installations, especially higher education institutions, by participating in various professional organizations. Regularly monitors relevant forums where job related issues are announced and discussed, stays informed of related problems/issues as they appear & are announced; passes on technical comments & suggestions that may be beneficial to colleagues.

Clearance Requirements:

Must possess and maintain a current/active TS/SCI clearance with

Polygraph Physical Requirements:

Must be able to remain in a stationary position 50% of the time Occasionally moves about inside the office to access file cabinets, office machinery, etc. Frequently communicate with co-workers, management, and customers, including delivering presentations. Must be able to exchange accurate information in these situations The projected compensation range for this position is $128,000.00

• 214,400.

00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections. MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.