---
title: 'GNC Embedded Engineer at Tiberius Aerospace Inc.'
canonical: 'https://feeny.ai/job/gnc-embedded-engineer-tiberius-aerospace-inc-tucson-fhm24b8ta4f7'
type: 'job'
last_seen: '2026-09-11'
---

# GNC Embedded Engineer at Tiberius Aerospace Inc.

- **Company:** Tiberius Aerospace Inc.
- **Location:** Tucson, AZ
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-07-20
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.lever.co/tiberius/b0c4b9ea-dc2d-4220-9d00-910e0c767525

## Job description

Senior GNC Embedded and HIL Engineer GNC Software Engineer  |  Embedded Flight Software  |  SIL / HIL Infrastructure

Job Title Senior GNC Software Engineer Location Hybrid, Tucson, Arizona (on-site for HIL activities) Employment Type Full Time Department GNC / Flight Software Reports To Shawn Gilmore Salary Range $155,000 to $200,000 Equity Yes

## About Tiberius Aerospace

Tiberius Aerospace is a cutting-edge Aerospace and Defense company delivering advanced, mission-critical technologies for government and private sector customers. The company focuses on high-performance aerospace systems, secure engineering solutions, and the development of complex hardware built for demanding operational environments. Tiberius is scaling quickly and is looking for engineers who can operate with ownership, urgency, and technical discipline in a high-stakes environment. Position Overview Tiberius Aerospace is seeking a Senior GNC Navigation Engineer to own the translation of GNC algorithms into production-grade, real-time embedded flight software for the program. This role bridges algorithm design and hardware, developing the embedded navigation filter, guidance logic, and autopilot control laws on the flight computer, along with the SIL and HIL infrastructure required to verify GNC performance end-to-end from algorithm through silicon. You are the person who makes the math run in the box.

## What You'll Do

Implement GNC algorithms including the navigation filter, guidance law, and autopilot control laws in embedded C or C++ targeting the flight computer. Define and own the GNC flight software architecture including task scheduling, sensor data interfaces, GNC state machine, and fault detection logic. Develop and maintain the Software-in-the-Loop environment integrating GNC flight code with the 6-DOF trajectory simulation for closed-loop algorithm verification. Design and build the Hardware-in-the-Loop test bench including GPS signal stimulation, IMU stimulation hardware, actuator emulation, and avionics bus interfaces. Apply and enforce flight software coding standards and institute code review processes across the GNC software team. Define GNC software requirements and verification test cases and execute and close the GNC software V&V test plan. Collaborate with navigation and controls engineers on algorithm translation, numerical stability, and fixed and floating-point performance trade-offs. Perform real-time performance characterization covering CPU budget, worst-case execution time, timing jitter, and latency analysis. Support environmental test, ground test, and range test activities as the GNC software technical lead. Technical & Algorithm Implementation & Flight Software Engineering Implement the GPS/INS navigation filter in embedded C or C++ with rigorous attention to numerical stability, fixed-point arithmetic constraints, and real-time execution timing. Develop the GNC task framework including sensor read scheduling, filter update cadence, guidance computation, and actuator command output with deterministic timing. Build and maintain the SIL environment in which the production GNC flight binary executes against the MATLAB/Simulink 6-DOF plant model in closed loop for regression testing. Design the HIL test bench architecture including interface hardware for GPS receiver simulation, IMU digital output stimulation, actuator feedback emulation, and data recording. Implement auto-code generation workflow from MATLAB/Simulink navigation and control law models to production C code using Embedded Coder or equivalent. Define and apply coding standards for the GNC software module including MISRA-C rules, static analysis requirements, and unit test coverage expectations. Develop the GNC software build system, regression test suite, and continuous integration process to support rapid algorithm iteration. Characterize flight computer GNC software performance under worst-case loading and document CPU margin, memory usage, and stack depth results. Operational & Engineering Support Interface with the flight computer hardware team on processor selection, memory architecture, sensor bus protocols, and boot sequence requirements. Coordinate GNC software schedule and deliverables with systems engineering, the navigation team, and the I&T team. Support range test activities by providing GNC software configuration control, pre-test checkout procedures, and post-test log data extraction. Participate in configuration control board reviews for GNC software changes and maintain the software version log. Support environmental qualification by preparing GNC software test configurations for vibration, thermal, and shock testing. Provide GNC software technical inputs to subcontractor statements of work for GPS receiver and IMU firmware interfaces.

## What You'll Bring

B.S. or M.S. in Computer Engineering, Electrical Engineering, or Aerospace Engineering. 8 or more years of embedded flight software development for flight-critical defense or aerospace systems. Expert-level C and C++ in real-time embedded environments including RTOS and bare-metal architectures. Demonstrated experience implementing Kalman filter variants or flight control laws in embedded production code. Proficiency in MATLAB and Simulink Model-Based Design including production C code generation using Embedded Coder or equivalent. Experience developing or operating SIL and HIL test infrastructure for GNC algorithm verification. Must be a U.S. citizen and eligible to obtain and maintain a U.S. government security clearance.

## Preferred Experience

Experience with GPS receiver software interfaces including NMEA, binary proprietary protocols, and M-code or SAASM pulse-per-second and timing interfaces. Background implementing DO-178C, MISRA-C, or equivalent safety-critical software standards in a flight program. Experience with high-g inertial sensor digital interfaces including SPI or UART IMU protocols and in-flight calibration algorithms. Familiarity with MIL-STD-1553, RS-422, or ARINC 429 avionics bus interfaces. Background with high-g avionics design considerations such as connector retention, PCB via-fill, and component derating under high-g launch load. Experience with FPGA co-design for navigation algorithm pre-processing or sensor timing synchronization. Active U.S. Secret or Top Secret security clearance.

## What We're Looking For

An embedded GNC software engineer who can implement a navigation filter from a MATLAB prototype, make it run deterministically on a flight computer, and verify it against a 6-DOF plant model. Someone who owns the SIL and HIL infrastructure, not just uses it, and can build it from scratch when it does not yet exist. An engineer with the numerical instincts to know when a 32-bit float is not enough and the discipline to enforce coding standards that matter. A technical leader comfortable reviewing algorithm equations with navigation engineers and debugging SPI bus timing issues with hardware engineers on the same day. A high-ownership engineer who treats flight software as a safety-critical deliverable and builds accordingly.

## Compensation & Benefits

Tiberius Aerospace offers competitive base compensation commensurate with experience, equity participation, comprehensive health benefits, and 401(k). Specific compensation will be discussed during the interview process. Growth Opportunity This role offers the opportunity to build the GNC flight software function at Tiberius Aerospace from the ground up on a program where the algorithm complexity and flight environment are genuinely challenging. The Senior GNC Software Engineer will own the implementation stack, build the test infrastructure, and close the software V&V against a real flight computer. As Tiberius grows, this person will be positioned to lead the broader flight software team and influence avionics architecture decisions on follow-on programs.

## Equal Opportunity Statement

Tiberius Aerospace Inc. is an Equal Opportunity Employer. The Company maintains policies and practices designed to prevent discrimination or harassment against any qualified applicant or employee to the extent prohibited by federal, state, and local laws and regulations. Discrimination on the basis of race, ethnicity, color, religion, ancestry, national origin, citizenship, sex, age, marital status, sexual orientation, physical or mental disability, medical condition, genetic information, military or veteran status, gender identity, gender expression, or any other characteristic protected by applicable law is prohibited. If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process, or need an alternative method for applying, you may contact jpetrina@tiberius.com for assistance. Tiberius Aerospace Inc. participates in E-Verify and will provide the federal government with your I-9 Form information to confirm that you are authorized to work in the U.S.

## About Tiberius Aerospace Inc.

## Company Overview
- **One-liner**: Tiberius Aerospace is a modern defense technology company developing advanced weapons systems—including supersonic ramjet munitions, guided munitions, and AI-enabled lethality—for the UK, US, and allied nations under a Defense-as-a-Service (DaaS) model.
- **Entity Type**: Private (Seed stage; $4.5M total funding)
- **Headquarters**: London, United Kingdom (with significant operations in Newport Beach, CA, USA and Tucson, AZ, USA)
- **Founded**: 2021
- **Founders**: Chad Steelberg (Founder), Andy Baynes (Co-founder, Chief Strategy Officer), Michael Martin (Co-founder, Chief Operating Officer)

## Core Business
- **Primary industry/industries**: Defense and Space Manufacturing, Aerospace, National Security
- **Target customers**: Government and military customers (US, UK, and allied nations); B2G (Business-to-Government) focus
- **Mission or purpose statement**: "To serve our nations with Strength, Honor, and Purpose - forging the systems that defend freedom and shape the future of defense."

## Products & Services
- **SCEPTRE**: A flagship program focused on guided munitions and advanced missiles, designed for precision and scalability.
- **GRAIL**: An AI-enabled lethality and autonomous platform program, involving software products for next-generation defense systems.
- **LAB**: Tiberius's continuous innovation engine that separates R&D from manufacturing, enabling rapid iteration and sovereign scalability.
- **DAAS (Defense-as-a-Service)**: The company's core operating model—a radically different approach that decouples R&D from production to allow faster adaptation, cost-effective lethality, and continuous evolution of systems.

## Market Standing
- **Valuation/Market Cap**: Not publicly available
- **Key Metric**: $4.5M in total funding (Seed Round, October 2025)
- **Notable Investors/Partners**: 4 investors participated in the Seed round (names not publicly listed); key partnerships with US and UK allied governments.
- **Growth Signals**: Headcount grew **366.7% year-over-year** to 21 employees; actively hiring across multiple engineering and operations roles; distributed workforce across the US and UK; flagship programs (SCEPTRE, GRAIL) are operational and scaling.

## Competitive Advantages
- **Defense-as-a-Service (DaaS) model**: A unique approach that separates R&D from manufacturing, allowing for rapid iteration, sovereign scalability, and continuous innovation—a stark contrast to traditional prime defense contractors.
- **Speed and adaptability**: Designed for a new era of conflict where speed and cost-effective lethality are critical; the company's ethos is to "adapt faster than emerging threats."
- **AI and software-first mindset**: Leadership and talent come from companies where rapid iteration, software, and AI were the norm; this mindset is applied to hardware and defense systems, creating continuously learning and evolving platforms.
- **Talent acquisition from top defense primes**: Key hires from Raytheon (6 employees), NASA Jet Propulsion Laboratory, and other defense tech companies, bringing deep domain expertise.

## Strategic Focus
- **Current priorities**: Scaling the SCEPTRE and GRAIL programs; expanding sovereign manufacturing capabilities for the UK and US; building a continuously learning ecosystem that connects engineers, manufacturers, operators, and governments.
- **Direction for growth**: Global expansion with allied nations; deepening AI and autonomous capabilities; moving from seed-stage to production and deployment at scale.

## Why Work Here
- **Culture**: A mission-driven environment focused on "difficult problems" with real-world impact at global scale. The company emphasizes that "software can transform hardware" and is building a new model for defense.
- **Remote/Hybrid policy**: Offers remote, hybrid, and on-site work options depending on the role. Many positions are fully remote; engineering roles (e.g., Test Engineer, GNC Engineer) in Tucson, AZ are on-site.
- **Notable perks**:
  - **Equity**: Stock ownership in the company
  - **Medical, Dental & Vision**: 100% employer-paid for employee and/or family
  - **Life Insurance**: 100% employer-paid, 2x salary up to $1 million
  - **401(k)**: Both standard and Roth options available
  - **Unlimited PTO**: At manager's discretion
  - **Paid Parental Leave**: 2 weeks
  - **Sick Leave**: 80 hours annually
  - **Flexible vacation and hybrid/remote schedules**
- **Engineering culture**: Focus on GNC (Guidance, Navigation, and Control), embedded systems, flight performance, CFD, and AI; the team is described as "redefining not just what gets built, but how defense itself is built."

## Sources
1. [tiberius.com - About Us](https://www.tiberius.com/about-us)
2. [tiberius.com - Join Us](https://www.tiberius.com/join-us)
3. [linkedin.com - Company Profile](https://linkedin.com/company/tiberius-aerospace)
4. [builtin.com - Company Profile](https://builtin.com/company/tiberius-aerospace-inc)
5. [jobs.lever.co - Careers Page](https://jobs.lever.co/tiberius)

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