**Description** The Defense Systems group at Leidos currently has an opening for a **Senior Principal Electrical Engineer** to work in our **St.Petersburg, FL** office. The Leidos facility in St. Petersburg provides design, development, modeling and simulation, analysis, prototyping and testing of advanced electronic systems, with a focus on embedded communication systems, Software Defined Radios and Phased Array Antenna Systems to various DOD and commercial customers. Primary Responsibilities + Perform technical planning, system hardware-software-network design, development and integration, verification and validation, and fielding + Evaluates alternatives including cost and risk, supportability, and analyses for total systems + Perform requirements management & traceability for various systems + Perform requirements analysis, functional analysis, timeline analysis, trade studies, requirements allocation and interface definition, technical management, integration, system testing, and quality assurance + Lead a multi-disciplined team of engineers to identify system implementation approaches and provide technical oversight to ensure system level requirements are met + Generate technical documentation including system architecture, test plans and procedures, and test reports; and providing recommendations on technologies and industry trending + Contribute to future capture/pursuit opportunities, including white papers, RFI responses, or proposal of technical volumes Basic Qualifications + Candidate must be a US citizen and able to obtain and maintain a Secret Security Clearance + Requires BS degree and 15 years minimum of prior relevant experience or Masters with 13 years of prior relevant experience + Experience in one or more of the following: RF theory, power supply design, wireless/SIGINT technologies, microwave principles and system/subsystem-level analysis methodologies + Working knowledge of the radio frequency spectrum and modern communication infrastructures to include signal structures, propagation, modulation types, data rates, multiplexing/demultiplexing methods + Demonstrated ability to lead a multi-disciplined engineering team and to hold technical design reviews (SRR, PDR, CDR, and TIM) with customers + Experience in HW integration and corresponding HW & SW integration + A broad knowledge of project management + Excellent communication skills- oral and written Preferred Qualifications + Active Security Clearance + Experienced in advanced waveforms and antennas for communication systems + System design experience and collaboration across multiple engineering disciplines, such as electrical, electronics, mechanical, software, and computer engineering + Model-Based Systems Engineering (MBSE) & Architecture + Experience with the following: + Hardware design (RF, digital, and analog) to include printed wiring board layout, schematic, and wide knowledge of component functionalities. + Design life cycles and various environmental requirements + VHDL design and implementation + Simulation tools including MatLab, Python and Labview + Using various test equipment- Oscilloscope, Logic Analyzer, Spectrum Analyzer, Network Analyzer, and other RF/Digital equipment At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.” If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in. **Original Posting:** September 2, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. **Pay Range:** Pay Range $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. REQNUMBER: R-00165759 All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.