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# Principal Systems Engineer - (Onsite)

- **Company:** RTX
- **Location:** Largo, FL, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, VoIP, C++ (Programming Language), Communications Protocols, Data Transmissions, Firmware, Internet Group Management Protocols, Python (Programming Language), Network Troubleshooting, MATLAB, Multicasting, Networking Basics, Simulink, Software Engineering, TCP/IP, Wireshark, Universal Asynchronous Receiver/Transmitter, VHSIC Hardware Description Language (VHDL), Serial Peripheral Interface, PIC Microcontroller, SC Clearance
- **Published:** June 29, 2026
- **Apply:** https://www.juju.com/job/00000000gc4846

## About the Role

+ Ability to lead multidisciplinary teams of design professionals including Electrical, Mechanical, Software, Test, Logistics and other System Engineers.

 + Experience in at least three of the following areas: Systems Engineering/Test Engineering/Software Engineering/Mechanical Engineering/Electrical Engineering.

 + Experience across the Systems Engineering V with an emphasis on development, integration, and test.

 + Experience working with Secure Voice and VTC Communication Systems.

 + Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience.

 + **Active and transferable U.S. government issued Secret security clearance is required prior to start date. Must have the ability to obtain Top Secret.**

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

Qualifications We Prefer:

 + Familiarity with embedded systems, microcontrollers, and communication protocols (e.g., I2C, SPI, UART).

 + Experience with voice communication systems, including VoIP (Voice over IP) protocols like SIP, RTP and SRTP.

 + Familiarity with multicast networking (e.g., IGMP, PIM) for efficient data transmission in communication systems.

 + Strong understanding of networking principles, including TCP/IP, UDP, and network troubleshooting tools (e.g., Wireshark).

 + Basic understanding of firmware development (VHDL) and/or software development (C/C++, Python).

 + Knowledge of military specifications (e.g., MIL-STD-810, MIL-STD-461) for designing rugged and reliable systems.

 + Proficiency in system design tools (e.g., MATLAB, Simulink, or equivalent).

 + Experience leading discussions with customers and vendors/subcontractors.

 + A current active Top-Secret Clearance.

## Description

We are seeking a **Principal** **Systems Engineer** to work onsite in **Largo, FL.**

This position requires:** **US Government Department of Defense (DoD) Secret Security Clearance Day 1** **with the ability to obtain Top Secret.

What You Will Do:

 + Organize and lead the development of full lifecycle solutions from CONOPS to Validation while collaborating with the customer, subcontractors, and executive leadership.

 + Guide the development of new technologies to support business capture.

 + Identify technology gaps in existing systems and solutions.

 + Own the preparation, cost, and schedule of Design Reviews as well as Development, Integration, Dry Run, and Formal Qualification Testing.

 + Influence decision-makers with recommended courses of action across complex problems.

 + Review and document major changes in systems or processes to solve complex problems.


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