Senior Principal Network Engineer, onsite, Marlborough, MA

Prattwhitney; Sudbury (MA); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Medical

Dental

Vision

401(k) match

PTO

Job summary

RTX is seeking a Senior Principal Network Engineer (P4) to ensure the smooth operation of classified network infrastructure at Raytheon/RTX locations. The role is onsite in Marlborough, MA and relocation eligible under policy. Active DoD TS clearance is required on day 1.

Responsibilities include advanced LAN/WAN support, vulnerability review, network design projects, and documentation to meet security requirements. Travel and after-hours work may be necessary.

Qualifications

• Typically requires a University Degree or equivalent experience and minimum 8 years prior relevant experience, or an Advanced Degree with minimum 5 years' experience.
• Knowledge of configuration and troubleshooting of Cisco routers, switches, firewalls, and intrusion detection systems, including software upgrades.
• Active and transferable U.S. government issued Top Secret DOD security clearance is required prior to start date.

Responsibilities

• Provide advanced knowledge in support of LAN/WAN components including routers, switches, firewalls (Cisco/Palo Alto).
• Monitor, analyze, troubleshoot, and optimize network system performance.
• Review system vulnerability assessments to ensure compliance with industry standards and best practices.
• Drive and/or participate in projects to install or improve voice, video, and network infrastructure.
• Produce, update, and improve technical documentation to support security requirements and operations.

Skills

LAN/WAN networks

Cisco routers

Firewall security

Network monitoring

Education

University degree or equivalent

Advanced degree

Tools

Cisco routers

Palo Alto firewalls

SolarWinds

Visio

Job description

Senior Principal Network Engineer (P4)

Date Posted: 2026-09-14

Country: United States of America

Location: US-MA-MARLBOROUGH-MA3 ~ 1001 Boston Post Rd ~ BLDG 3

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: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1

Office Details

Senior Principal Network Engineer (P4) (Manager, Information Workplace Services) to ensure the smooth operation of classified Proprietary Program network infrastructure at our Raytheon/RTX locations. The installation, maintenance, support, and monitoring of the network infrastructure will be performed. Candidates must have advanced background supporting networks.

This role is in Marlborough, MA and the role will be onsite. This role is relocation eligible if the selected applicant meets company policy criteria.

Key Responsibilities

Provide advanced knowledge in support of (software/firmware/hardware) LAN/WAN components including routers, switches, firewalls (Cisco/Palo Alto). Monitor, analyze, troubleshoot, and optimize network system performance, proactively identifying and quickly resolving service impacting issues.

Review system vulnerability assessments to ensure compliance with recognized industry standards and best practices.

Drive and/or participate in 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.

Propose to management and configure network solutions, meeting all communications requirements based on future needs, current usage, cost savings, and availability.

Provide regular monitoring and network analysis regarding short- and long-range planning for network infrastructure.

Assist with coordination of third-party maintenance and procurement for network equipment or with vendors for third-party support.

Assist in the overall performance and capability of technical teams through mentoring, training, and knowledge sharing.

Willingness and availability to work outside normal business hours (evenings and weekends) as needed.

Willingness and availability to travel to local and other U.S domestic sites approximately 30% of time.

Must be able to work with general supervision and follow established procedures.

What You Will Learn

Apply Network Engineering expertise to facility moves, new construction buildings, supporting classified programs in multiple locations across Raytheon. Advanced knowledge of industry leading network products and Network Design/Architecture for all programs.

Qualifications You Must Have

Typically requires a University Degree or equivalent experience and minimum 8 years prior relevant experience, or an Advanced Degree in a related field and minimum 5 years' experience.

Knowledge of configuration and troubleshooting of Cisco routers, switches, firewalls, and intrusion detection systems, including software upgrades.

Active and transferable U.S. government issued Top Secret DOD security clearance is required prior to start date.

U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• Certifications in Security+ within 6 months and Cisco Certified Network Associate (CCNA) is highly desired within a year.
• Experience with current cabling and fiber standards.
• Experience with access control list, security posture, and vendor best practices.
• Experience with Visio diagramming and design capabilities 1-2 years of experience with network management software.
• Willingness and availability to travel domestically as needed.
• Knowledge of configuration and troubleshooting of encryption devices.
• Effective customer service skills, including oral and written communications.
• Experience with platforms such as IP telephony, NTP servers, GemOne, and SolarWinds.
• Ability to work under time constraints.
• Experience with classified computing, STIG compliance, and network refreshes.
• Current DoD Top Secret level security clearance.

Benefits

• Medical
• Dental
• Vision
• Life insurance
• Short-term disability
• Long-term disability
• 401(k) match
• Flexible spending accounts
• Flexible work schedules
• Employee assistance program
• Employee Scholar Program
• Parental leave
• Paid time off
• Holidays

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.

Rate

The salary range for this role is 107,500 USD - 204,500 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.

Company Culture

At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

Equal Opportunity Employer

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.

Privacy Policy and Terms:

Additional Information

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

This is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX 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, Pratt & Whitney, and Raytheon. Its 195,000 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, Virginia.