Principal Network Engineer

Date Posted:

2026-06-11

Country:

United States of America

Location:

US-MA-TEWKSBURY-TB3 ~ 50 Apple Hill Dr ~ CONCORD BLDG, Tewksbury Tb3 300 Concord

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

Active and transferable U.S. government issued security clearance is required prior to start date.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance​

Security Clearance Type:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required on day 1

RTX Corporation is an Aerospace and Defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace Systems, Pratt & Whitney, and Raytheon. Its 185,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, VA.   

The following position is to join our RTX Enterprise Services team:

Principal Network Engineer supporting RTX's Classified Network Services team, responsible for designing, administering, and securing enterprise LAN/WAN, data center, and firewall infrastructure across classified environments. The role supports critical collaboration and connectivity needs for Raytheon, Collins Aerospace, Pratt & Whitney, and U.S. government customers, with a primary work location in Tewksbury, MA.

What You Will Do:

• Maintain, and upgrade (software/firmware/hardware) LAN/WAN components including routers, switches, firewalls.
• Monitor, analyze, troubleshoot, and optimize network system performance, proactively identifying and quickly resolving service impacting issues.
• Drive and/or participate in large projects in support of installation and/or improvement to voice, video, and network infrastructure.
• Produce, update and generally improve technical documentation to support security requirements and operational support of systems.
• Review systems vulnerability assessments to ensure compliance with recognized industry standards and best practices.

Qualifications You Must Have:

• Typically requires a University Degree or equivalent experience and a minimum of 5 years of experience, or an Advanced Degree and a minimum of 3 years of experience.
• Security Clearance: Candidate must possess an active DoD Secret clearance on Day 1 and maintain throughout employment and be potentially clearable through Top Secret.
• Have a DoD 8570 – IAT .Level III security certification (e.g CASP+ CE, CCNP Security, CISA, CISSP, GCED, GCIH, CCSP) or able to obtain one within 6 months of employment

Qualifications We Prefer:

• Experience as a Network Administrator in classified environments, supporting enterprise Cisco networking infrastructure.
• Hands-on experience with Cisco NGFW, Cisco ASA, Nexus/NX-OS, Palo Alto firewalls, and LAN/WAN routing and switching technologies.
• Experience with VPNs, HAIPE encryptors, ISE, CUCM/CMS, authentication services, network monitoring, vulnerability scanning, and network automation using Ansible or Python.

Learn More & Apply Now

Work Location: Onsite - Tewksbury MA, Tuscon, AZ, or McKinney, TX
Please consider the following role type definition as you apply for this role:
Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.

Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term