Sr. Systems Security Engineer (Onsite - Largo, FL) TS/SCI clearance required

RTX (Raytheon); Florida; On-site; USD 130,000 - 170,000; Full time

Job summary

RTX (Raytheon) in Largo, FL is seeking a Senior Systems Security Engineer to contribute to the Starburst program. You will implement and sustain DoD-grade security solutions on an air-gapped network and work with systems engineers, software engineers, and cyber specialists in a multi-discipline team.

This onsite role requires TS/SCI clearance, DoD 8570 IAT Level II certification, and hands-on experience with Linux/Windows administration, LDAP/PKI, and VMware. Up to 10% travel may be needed.

Qualifications

• Active and transferable TS/SCI clearance required prior to start date.
• Experience in Systems Administration using Linux and Windows desktop and server operating systems (Windows 11/Server 2022/RHEL).
• Active DoD 8570 IAT Level II certification (e.g. CISSP/Security+) and ability to maintain.

Responsibilities

• Operate within the Security Engineering domain on a DoD IT network to deploy new capabilities.
• Create and present materials to convey concepts to diverse audiences.
• Work onsite in a closed area with occasional offsite opportunities.
• Document systems, schematics and operational guides and procedures.
• Interface with teams to define and implement cyber risk posture and information assurance.
• Travel up to 10%.

Skills

Security engineering

Systems administration (Linux/Windows)

TS/SCI clearance

IAT II certification

LDAP/PKI

VMware (vSphere/vCenter/ESXi)

Education

STEM degree

Advanced degree in related field

Tools

VMware

Active Directory

PKI

Job description

Date Posted:2026-10-14Country:United States of AmericaLocation:US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100Position Role Type:OnsiteU.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 clearanceSecurity Clearance Type:TS/SCI - CurrentSecurity Clearance Status:Active and existing security clearance required on day 1

Raytheon Company, Managed by Collins AerospaceAt RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

The Starburst Engineering Department, located in Largo, FL, is seeking a Senior Systems Security Engineer to contribute to the development and deployment of Security solutions on the Starburst program. This candidate will be integrated into a multi-discipline team environment, with representation from System Engineers, Software Engineers, Cyber Engineers, Digital Technology, and Field Services. Primary responsibilities are the implementation and sustainment of requirements for deployed products and services that are in operational and sustainment states. As a Systems Security Engineer, this candidate will make a significant impact to the program's execution, working with the Project Engineers (Cost Account Managers and Integrated Product Team Leads) and other discipline leads to execute the development and deployment of program products and services.

This role will be worked onsite in Largo, FL and requires an active and transferrable TS/SCI clearance. Relocation assistance is not available.

What You Will Do:

• Work within the Security Engineering domain and as a part of the larger enterprise engineering effort, you will operate within a custom, air-gapped, Department of Defense (DoD) IT network on a daily basis to perform advanced support and direct deployment of new capabilities at a sustained rate
• Demonstrate your ability to create and present materials to convey concepts and ideas to a wide range of audiences
• Work primarily onsite in a closed area environment with occasionally opportunity to work offsite
• Demonstrate your ability to create, follow and update to system documentation, schematics and operational guides and procedures
• Demonstrate your ability to interface with other teams to help define, determine and implement cyber risk posture, cyber risk mitigation and information assurance throughout the enterprise IT service portfolio on a sustained level
• Travel up to 10%

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience
• Active and transferable U.S. government issued TS/SCI security clearance is required prior to start date
• Experience in Systems Administration using Linux and Windows desktop and server operating systems (Windows 11/Server 2022/RHEL)
• Active DoD 8570 IAT Level II certification e.g. CISSP and/or Security+, with the ability to maintain
• Proficient knowledge of Enterprise Identity Management applications and design including LDAP (e.g. Active Directory) and PKI
• Experience with common VMware products (vSphere, vCenter, ESXi) and overall virtualization implementations

Qualifications We Prefer:

• Broad understanding of traditional, and current on-prem enterprise IT systems and technologies and its impacts to the security of: - Identification, Credential and Access Management (ICAM) for those systems. - secure enterprise messaging - Enterprise Logging Ingest, - Cyber Situational Awareness and protection, - Endpoint Detection and Response
• Experience with various computing hardware and software platforms, including servers, workstations, supporting various COTS software applications
• Experience maintaining Window servers and troubleshooting software applications
• Experience with custom software applications
• Experience with enterprise firewalls, including knowledge of firewall policies/rulesets
• Understanding of basic network engineering fundamentals, including: OSI layers, IP addressing, sub-netting, TCP/IP stack, VLANs, well-known ports and protocols, etc.
• Knowledge and experience leading or contributi