Senior Principal Systems Engineer - C3MS (Onsite)

Senior Principal Systems Engineer – C3MS (Onsite) Location: Washington, DC (Anacostia) – White House Communications Agency (WHCA) support, onsite. Security Clearance: Active, transferable DoD Top Secret/SCI with current SSBI on Day1. U.S. citizenship required. Responsibilities Provide engineering support for WHSVN projects, procurements, and system enhancements. Review existing system designs and develop updated technical solutions for both TDM and IP secure voice architectures. Develop and maintain system drawings, test procedures, and other engineering documentation. Support system integration activities, including site surveys, installation validation, and interoperability assessments. Provide configuration guidance and assist with required architecture or infrastructure modifications. Analyze technical requirements, create engineering plans, and manage work through WHCA’s ticketing and collaboration tools. Participate in program reviews, audits, and technical meetings, offering recommendations to improve system performance and support modernization efforts. Produce design guidance, network depictions, and migration plans for full WHSVN implementation. Qualifications Typically requires a STEM degree and minimum 10 years of relevant experience, or an advanced degree with minimum 7 years of experience in Systems Engineering. Active and transferable DoD Top Secret/SCI with current SSBI required prior to start date. 3–5 years of experience supporting circuit‑switched and IP‑based systems. Experience with Command and Control Switching Systems on mission‑critical networks. Knowledge of the Defense Red Switch Network (DRSN) through operational, testing, or engineering roles. Experience contributing to system accreditation efforts, including XACTA updates and RMF execution. Experience configuring, installing, and validating encryption devices for secure deployment. Compliance with DoD8140 Cyber Workforce Qualification requirements. Preferred Qualifications Experience supporting secure voice or Command and Control systems in mission‑critical environments. Experience modernizing legacy TDM systems and deploying secure IP‑based voice solutions. Experience with system interoperability testing, lab validation, and technical risk assessment. Ability to produce comprehensive engineering documentation such as system diagrams, test plans, and lifecycle planning materials. Familiarity with WHCA environments, DRSN architectures, or DoD enterprise communications systems. Experience supporting RMF compliance in collaboration with ISSO/ISSM personnel. Experience coordinating with facility teams on power, cooling, and physical infrastructure requirements. Strong skills in managing complex technical tasks, maintaining accurate records, and communicating with government stakeholders. Benefits Medical, dental, and vision insurance. Three weeks of vacation for newly hired employees. Generous 401(k) plan with employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option. Tuition reimbursement program. Student loan repayment program. Life insurance and disability coverage. Optional coverages including pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection. Birth, adoption, parental leave benefits. Ovia Health, fertility, and family planning. Adoption Assistance. Autism Benefit. Employee Assistance Plan, including up to 10 free counseling sessions. Healthy You Incentives, wellness rewards program. Doctor on Demand, virtual doctor visits. Bright Horizons, child and elder care services. Teladoc Medical Experts, second opinion program. Eligible for relocation assistance. Additional benefits as applicable. Equal Opportunity Employer RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. #J-18808-Ljbffr Segment (Twilio)