EMW, Inc. is seeking a Senior Software Engineer to join their Assurance Tools Section within the Assurance Solutions Branch. This role focuses on developing and supporting tools for the assurance and validation of Communication Information Systems (CIS) readiness in NATO Command Structure. The position requires expertise in C#, .NET Core, and various Microsoft technologies, with a strong emphasis on building secure, modular applications. This is a contract position running from July 2025 to December 2025, requiring NATO SECRET clearance and full-time on-site presence in The Hague. The role offers an opportunity to work on critical systems supporting NATO-led missions and exercises, while mentoring junior developers and contributing to architectural decisions.