Sentinel Principal​/Sr Principal Software Integration Engineer

Relocation Assistance

Relocation assistance may be available

• Clearance required:
  
  Yes (Secret)
• Travel:
  Yes, 10% of the time

• Medical, Dental & Vision coverage
• 401(k)
• Educational Assistance
• Life Insurance
• Employee Assistance Programs & Work/Life Solutions
• Paid Time Off
• Health & Wellness Resources
• Employee Discounts

The standard work schedule is a 9/80. The 9/80 schedule allows employees who work a nine‑hour day Monday through Thursday to take every other Friday off.

• Python proficiency – writing clean, testable code; familiarity with virtual environments, packaging, and type hints
• Embedded/hardware interfaces – UART, SPI, I²C, CAN, USB, JTAG, GPIO, PWM, ADC/DAC
• Real‑time operating systems (RTOS) or bare‑metal development basics
• Hardware description/validation tools – oscilloscopes, logic analyzers, multimeters, power supplies, test rigs
• Firmware build systems – Make, CMake for cross‑compilation
• Version control – Git (branching, sub‑modules, pull‑request workflow)
• CI/CD for embedded – Jenkins, Git Hub Actions, Git Lab CI with hardware‑in‑the‑loop (HIL) runners

• Designing and implementing drivers/APIs that expose hardware functionality to Python
• Using communication protocols (Modbus, MQTT, OPC?
  
  UA) to bridge software services and devices
• Managing bootloaders, firmware upgrades, and configuration flashing

• Unit/Component testing – pytest, unittest, hypothesis for pure‑Python modules
• Hardware‑in‑the‑loop (HIL) testing – automated scripts that program devices, run stimulus, capture response, and assert results
• System‑level testing – Robot Framework, Test Stand, or custom Python harnesses that coordinate multiple subsystems
• Automated measurement – pyvisa / pyserial to drive test equipment and log data
• Coverage & static analysis – coverage.py, pylint, mypy

• Containerising test environments (Docker) for simulation and host‑side tools
• Managing artifact repositories for firmware binaries (Artifactory, Nexus)
• Using over‑the‑air (OTA) or in‑field update pipelines

• Agile/Scrum or Kanban for cross‑functional teams
• Familiarity with the V‑model or ISO:26262‑style verification flows in safety‑critical domains

• Strong analytical debugging – ability to trace issues from software logs down to signal integrity on a PCB
• Clear communication with electrical engineers, firmware developers, and QA testers
• Documentation discipline – hardware interface specs, test procedures, and release notes

• Principal Software Integration Engineer: 5 Years with Bachelor’s, 3 Years with Masters, 1 Year with PhD or 4 additional years in lieu of a degree
• US Citizenship with Active DoD Secret clearance with a reinvestigation date occurring in the last 6 years
• Ability to obtain Special Program Access (SAP)
• Ability to plan, execute, and manage the technical scope, and support leadership planning
• Experience with Agile and working in a cross‑function Scrum team
• Working knowledge of Object‑Oriented Analysis and Design principles
• Experience developing complex software solutions using C++
• Experience programming in scripting languages (Python, Bash)
• Familiarity with Model‑Based Systems Engineering languages (SysML/UML) and concepts
• Experience interpreting complex algorithms and requirements for implementation

• Scientific, Technical, Engineering, and Mathematics (STEM) degree or higher
• Experience with the Atlassian Tool Suite including Jira and Confluence
• Proficient with DOORS, Cameo with the ability to write and decompose system requirements
• Ability to evaluate risks and tradeoffs and present solution options to management

Primary Level Salary Range: $ – $Secondary Level Salary Range: $ – $The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.

Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit  U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.