Principal Software Engineer

Mtsi Va; Huntsville (AL); On-site; USD 180,000 - 240,000; Full time

Job summary

MTSI in Huntsville, AL, seeks a Principal Software Engineer to support the Missile Defense Agency Next Generation Software Office, accelerating the development, integration, and delivery of resilient and secure Missile Defense System software.

The role requires an active Secret clearance, a master's degree in a STEM field, and 12+ years of missile defense or large DoD program experience, with strong cloud, HWIL, and API expertise.

Qualifications

• Master's degree in a STEM field with 12+ years working on missile defense-related or other large DoD program/project.
• Experience designing, developing, and managing software libraries and cloud-based architectures.
• Experience in hardware-in-the-loop and cloud-based testing to support software development and delivery.
• Experience in API/interface control documents and enabling software in Cloud-based and HWIL environments.
• Experience in AI development and tooling and agentic operations.

Responsibilities

• Provide technical and engineering analysis to support development of on-demand and cloud-based software for system of system development, integration, and testing.

Skills

Secret clearance

DoD program experience

Cloud-based software

AI development

Leadership / independent work

Education

Master's degree in STEM

Tools

Docker

Kubernetes

AWS

Azure

Terraform

Ansible

Git

Job description

MTSI is looking for a talented Principal Software Engineer to join our team! In this role you will provide support to the Missile Defense Agency Next Generation Software Office to accelerate and modernize the development, integration, and delivery of resilient and secure Missile Defense System software.

Job Responsibilities

• Provide technical and engineering analysis to support development of on-demand and cloud-based software for system of system development, integration, and testing.

Required Qualifications

• US Citizenship and an active Secret clearance.
• Masters degree in a STEM field with 12+ years working on missile defense-related or other complex, large DoD program/project.
• Design, development, and management of software libraries and Cloud-based software architectures and requirements.
• Experience in hardware in the loop and cloud-based testing to support software development and delivery.
• Experience in management and review of application programming interfaces and interface control documents and enabling software utilized in Cloud-based and HWIL environments.
• Experience in artificial intelligence development and tooling and agentic operations.
• Ability to works independently, as a team member, or leading teams/ tasks, applying engineering rigor to solve engineering/ scientific problems.

Preferred Qualifications

• Practical experience with software containerization concepts (e.g., Docker, Kubernetes, AWS, Azure) and migrating legacy enterprise applications to cloud-native architectures.
• Strong working knowledge of Agile and Lean software development principles, particularly within a secure DoW DevSecOps framework.
• Infrastructure as Code (IaC): Knowledge of or direct experience deploying IaC tools (e.g., Terraform, Ansible) to establish reproducible, auditable, and secure cloud environments.
• Experience using modern configuration management and version control platforms (e.g., Git) to enforce policy-as-code, baseline management, and compliance configurations.
• Top secret clearance or the ability to qualify for one.

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