Senior Network Engineer

Job Overview

Modern Technology Solutions, Inc. (MTSI) is searching for a Senior Network Engineer.

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. 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.

• Manage the purchase, installation, and support of network communications, including LAN/WAN systems.
• Assist in planning large‑scale projects through vendor comparison and cost studies.
• Develop and maintain secure and highly efficient network architectures for 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.

• 10+ 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.

• 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.

Must have a Secret DoD Security Clearance.

• Starting PTO accrual of 20 days PTO/year + 10 holidays/year.
• Flexible schedules.
• 6% 401(k) 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.

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.

MTSI embraces nine core values and is 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.