• Principal Systems Engineer (Onsite)

    RTX Corporation (Largo, FL)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... and technically challenging. The Protected Communication Systems (PCS) team is hiring ** Principal Systems Engineers** to support programs for our US military and… more
    RTX Corporation (10/01/25)
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  • Senior Principal Systems Engineer (Cyber…

    RTX Corporation (Tewksbury, MA)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... create a safer, more secure world. Raytheon is seeking a **Senior** ** Principal ** **Systems Security Engineer-P5** to join our elite Systems Security Engineering… more
    RTX Corporation (10/01/25)
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  • Principal Guidance Section (GS) Lead

    RTX Corporation (Tucson, AZ)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... Mathematics (STEM) and a minimum of 8 years of prior relevant experience in one or more of the...to grow into a higher level. + Able to network / influence outside of the Flight Avionics Department… more
    RTX Corporation (10/01/25)
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  • Principal Program Scheduler

    L3Harris (Camden, NJ)
    …within the Integrated Mission Systems (IMS) Segment is seeking an experienced Principal , Program Planner/Scheduler who will lead the IMS level Program Startup, ... performs risk analysis, identifies and resolves critical path/driving path and network logic conflicts. Utilizes Gantt, PERT, milestone charts, earned value… more
    L3Harris (09/27/25)
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  • Principal Software Engineer - Embedded…

    RTX Corporation (Fort Wayne, IN)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... teams to create mission-critical solutions that support Mission Systems. Our Principal Software Engineers work in an exciting, adaptive, and engaging environment,… more
    RTX Corporation (09/27/25)
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  • Principal Systems Engineer

    RTX Corporation (Tewksbury, MA)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... Integrated Air & Missile Defense Systems (IAMDS) department is seeking a ** Principal Systems Engineer** with technical expertise and systems engineering skills to… more
    RTX Corporation (09/13/25)
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  • Principal Software Test Engineer (Onsite)

    RTX Corporation (Cedar Rapids, IA)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... **Security Clearance:** Secret - Current We're looking for a ** Principal Software Test Engineer** to join our team in...Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a… more
    RTX Corporation (09/11/25)
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  • Principal System Administrator Linux

    RTX Corporation (Andover, MA)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... solves tough, meaningful problems that create a safer, more secure world. ** Principal System Administrator** in Program Digital Services, collaborate with a diverse… more
    RTX Corporation (09/11/25)
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  • Principal Systems Engineer - Secure Systems…

    RTX Corporation (Cedar Rapids, IA)
    …Requirements:** Active and transferable US government issued security clearance is required prior to start date.​ US citizenship is required, as only US citizens ... eligible for a security clearance​ **Security Clearance:** DoD Clearance: Secret ** Principal Systems Engineer** **- Secure Systems (Onsite)** **Our nation's security… more
    RTX Corporation (08/14/25)
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  • Sr Principal Engineer Systems - Sys…

    Northrop Grumman (Colorado Springs, CO)
    …and Missile Defense Systems offers an exciting career opportunity for a Sr Principal Engineer Systems - Sys Engr-Interface Engineer (25-511) to join our team of ... formatting (eg, **XML** , **VMF** ) + Physical and network specifications and models (including the **ISO/OSI model** )...Professional - Model Builder Fundamental (OCSMP - MBF) + Prior work with **IBM Rational DOORS** (or similar requirements… more
    Northrop Grumman (10/11/25)
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