Senior Solutions Architect SME - Cloud & Mission Security

Leidos; St. Louis (MO); On-site; USD 131,000 - 237,000; Full time

Job summary

Leidos seeks a Solutions Architect SME to shape architecture for the Chinook Program, supporting an IC customer. You will serve as the senior technical authority across application, cloud, data, and infrastructure, guiding secure, scalable, mission-focused delivery.

The role requires deep leadership, ability to translate complex mission requirements into practical engineering, and collaboration with multiple teams and senior stakeholders. Active TS/SCI with polygraph is required.

Qualifications

• U.S. citizenship required for contract.
• BS in Systems Engineering or CS; 12–15 years experience or MS with 10–13 years.
• 12+ years in senior architect roles (Solutions/Enterprise/Systems).
• Strong experience with software architecture, distributed systems, APIs, data, and cloud.
• Leads cross-team technical direction and architecture reviews.

Responsibilities

• Define and evolve end-to-end architecture across app, cloud, data, integration, security, and infra domains.
• Translate requirements into secure, scalable, resilient solutions.
• Develop architecture roadmaps, reference architectures, and design patterns; lead trade studies.
• Provide technical direction, review designs, and resolve cross-team issues.
• Lead cloud and DevSecOps architecture—CI/CD, IaC, observability, and DR.
• Integrate security and mission assurance from start of development lifecycle.
• Support Agile/SAFe execution including PI Planning and backlog refinement.
• Define integration strategies and API standards across components.
• Communicate decisions and risks to leadership and stakeholders in mission terms.
• Mentor engineers, promote excellence, and drive modernization.

Skills

Senior architect experience

Software architecture

Distributed systems

APIs

Cloud technologies

Python

C++

CI/CD

DevSecOps

AWS / cloud certifications

Security

Leadership

Education

Bachelor's degree in Systems Engineering or Computer Science

Tools

AWS Cloud

Terraform

CI/CD tooling

IaC

Job description

Leidos seeks a Solutions Architect SME to shape architecture for the Chinook Program, supporting an IC customer. You will serve as the senior technical authority across application, cloud, data, and infrastructure, guiding secure, scalable, mission-focused delivery.

The role requires deep leadership, ability to translate complex mission requirements into practical engineering, and collaboration with multiple teams and senior stakeholders. Active TS/SCI with polygraph is required.