Software Systems Designer SME

Overview

The Software Systems Designer SME provides technical leadership in the design, integration, and delivery of complex software systems supporting advanced digital infrastructure efforts. This role focuses on enabling modern, cloud-based software environments and Dev Sec Ops  pipelines to support the development, integration, and delivery of software across platform, weapon, and terrestrial systems in highly secure environments.

The ideal candidate brings a systems-oriented mindset, experience coordinating across diverse technical teams, and the ability to communicate complex software and architecture concepts to a wide range of stakeholders.

• Software Systems Design & Integration
  • Support the design and integration of software systems across embedded platforms, mission systems, and terrestrial applications.
  • Contribute to software development activities including prototyping, integration, testing, and delivery across multiple security levels.
  • Ensure software solutions support interoperability, scalability, and long-term sustainability.
• Digital Infrastructure & Dev Sec Ops  Enablement
  • Support modern digital infrastructure and software pipelines that enable secure development, integration, and delivery.
  • Collaborate with cross-functional teams to improve software agility, automation, and delivery speed.
  • Evaluate and recommend improvements to tools, workflows, and processes supporting Dev Sec Ops  execution.
• Architecture Alignment & Technical Assessment
  • Support alignment with open architectures, reference frameworks, and interface standards.
  • Participate in technical planning, design reviews, test reviews, and technical assessments.
  • Assist in evaluating system designs for compliance, integration readiness, and operational suitability.
• Technical Coordination & Communication
  • Coordinate technical efforts across government and industry stakeholders.
  • Develop technical documentation, briefing materials, and decision support content.
  • Present technical information clearly to both technical and non-technical audiences, including senior leadership.

• Active TS/SCI clearance (required).
• Bachelor's degree in Engineering, Computer Science, or a related technical field.
• Experience supporting software systems design, integration, or architecture in secure or regulated environments.
• Familiarity with modern software development practices, including Agile and Dev Sec Ops .
• Experience using collaboration and engineering tools such as Jira, Confluence, and Cameo
  .
• Ability to work in classified environments, including vault/SCIF settings.
• Willingness to travel up to 20%.

• Experience working with open architectures, modular software systems, or reference architectures.
• Background supporting complex system-of-systems or mission-critical software efforts.
• Exposure to software delivery across multiple lifecycle phases.
• Strong problem-solving skills and willingness to operate in fast-paced, evolving environments.

Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance.

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit

MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.