Network Engineer

Network Engineer Modern Technology Solutions, Inc. 401(k) United States, Virginia, Alexandria 5285 Shawnee Road (Show on map) May 08, 2026 Modern Technology Solutions, Inc. (MTSI) is searching for a Senior Network Engineer. How you will contribute to our National Security and Defense mission: As a Network Engineer, you will design, implement, and maintain secure and reliable networks across classified and unclassified environments. This role encompasses managing both on-premises and cloud-based networking systems, ensuring seamless connectivity and robust security protocols. The candidate will be responsible for overseeing network configuration, troubleshooting, and optimization while adhering to strict compliance requirements. This position offers the unique opportunity to work in highly secure environments and play a critical role in supporting mission-critical operations through cutting-edge technologies. You'll be a great fit for this role if: You have a passion for technology. You understand the urgent need to modernize IT systems, cybersecurity practices, and infrastructure. You understand the Department of Defense reference and compliance architectures. You have Networking experience with Cloud systems, on-premises systems, Kubernetes, Containers, and CI/CD. You are passionate about continuous learning and growth, and you seek opportunities to challenge yourself. You are driven to make a meaningful impact through your work. You have excellent communication skills. You excel at identifying causes of complex networking issues and implementing solutions quickly.

Responsibilities:

Manage the purchase, installation, and support of network communications, including

LAN / WAN

systems. Assist in the planning for large-scale projects through vendor comparison and cost studies. Develop and maintain secure and highly efficient network architectures for both classified and unclassified systems. Support implementation, configuration, operations, and maintenance of multiple systems. Configure network hardware and software, including firewalls, routers, and switches, with attention to security and scalability. Proactively monitor network performance and reliability, identifying bottlenecks and areas for optimization. Diagnose and resolve network-related issues, maintaining minimal downtime and effective contingency planning. Deploy and maintain network security protocols in compliance with government regulations and DoD standards. Design and manage networking solutions that integrate on-premises systems with cloud environments. Ensure all systems meet regulatory requirements, performing audits and preparing documentation as needed. Work closely with cybersecurity teams to align network operations with organizational security goals.

Qualifications Required:

5+ years of experience working as a Network Engineer or in a related field. Extensive experience in network design and administration for classified and unclassified environments. Installing, configuring, and managing network switches, routers, firewalls, and related devices. Proficiency with Active Directory, domain controllers, IP addressing, DNS, remote access, VLANs, and VoIP systems. Deep understanding of cloud networking technologies (Azure, AWS, Nutanix, VMWare, or similar platforms) Expertise in networking protocols (TCP/IP, VPN, BGP, etc.) and security standards. Familiarity with DoD compliance frameworks (e.g., RMF, STIGs). Experience with enterprise-level network monitoring and management tools. Proficient in traditional on-premises and cloud-based networking services, solutions, and tools.

Education:

Bachelor's degree from an accredited university in an IT-related field such as Computer Networking, Computer Science, Computer Engineering, Information Technology, Information Systems, or a related field. Industry certifications such as CCNA, CCNP, CISSP, or AWS/Azure networking certifications are highly desirable.

Clearance Requirements:

Must have a Secret DoD Security Clearance. #LI-BG1 #

LI-Onsite Interesting Work:

Our co-workers support some of the most important and critical programs to our national defense and security.

Values:

Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry. 100%

Employee Owned:

We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year. Great Benefits - Most Full-Time Staff Are Eligible for: Starting PTO accrual of 20 days PTO/year + 10 holidays/year Flexible schedules 6% 401k match with immediate vesting up to $9k annually Semi-annual bonus eligibility (July and December) Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account Up to $10,000 in annual educational reimbursement Other company funded benefits, like life and disability insurance Optional zero deductible Blue Cross/Blue Shield health insurance plan

Track Record of Success:

We have grown every year since our founding in 1993. Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide. For more information about MTSI, please visit www.mtsi-va.com MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.