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

Date Posted: 2026-09-22 Country: United States of America Location: US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100 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: TS/SCI - Current Security Clearance Status: Active and existing security clearance required on day 1 Raytheon Company, Managed by Collins Aerospace At 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 is seeking a Sr. Systems Security Engineer to contribute to the development and deployment of System Security solutions on the Starburst program.  This candidate will be integrated into a multi-discipline team environment, with representation from System Engineers, Software Engineers, Cybersecurity, 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, you will make a significant impact to the program’s execution, working with the Project Engineers (Cost Account Managers and Integrated Product Team Leads) and Domain 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 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 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% may be required  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 with enterprise configuration and patch management using automated tools such as Microsoft End-Point Configuration Manager (MECM) or Windows Systems Update Service (WSUS) Active DoD 8570 IAT Level II certification e.g. Security+ and/or CISSP, with the ability to maintain Qualifications We Prefer: Systems Administration using Linux and Windows desktop and server operating systems (Windows 11/Server 2022/2025/RHEL) Experience with 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 Proficient knowledge of Enterprise Identity Management applications and design including LDAP (e.g. Active Directory) and PKI Experience with DISA Security Technical Implementation Guides (STIGs) and Compliance scans using ACAS or SCAP Compliance Checker (SCC) Experience with various computing hardware and software platforms, including servers, workstations, supporting various COTS software applications, and custom software applications Experience maintaining Window servers and troubleshooting software applications 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 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 contributing to integration efforts involving either Cybersecurity, Risk Management Framework, or Information Assurance  Knowledge of how to scan hardware and software for compliance and vulnerabilities utilizing industry tools such as Assured Compliance Assessment System (ACAS) Experience configuring and troubleshooting File Classification, labeling and associated policy tools (e.g. NextLabs, Boldon James), SIEM tools (e.g. Splunk), network monitoring tools (e.g.