Sr. Software Developer (.NET

Overview

Your Impact: Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior Software Developer to join our team in Fort Meade, MD
. In this role you will support challenging, mission-critical projects that make a direct impact on the Nation’s security and intelligence mission.

We are seeking Software Developers and Data Analysts with at least two years of experience in website coding, basic graphics techniques, Structured Query Language (SQL), HTML, and XML.

• Software Development:
  Develop new, cutting-edge software solutions for SENTINEL utilizing C# programming skills.
• Maintain and enhance existing functionality within the SENTINEL application.
• Contribute to the design and architecture of new features and components.
• .NET Core Application Development:
  Develop enterprise-level web applications utilizing .NET Core, Razor Pages, Dependency Injection, Web APIs, and HTTP request/response handling.
• Data Management:
  Utilize EF Core, Code First, Migrations, and LINQ to manage data interactions with SQL Server, including data insertion, querying, updating, and deletion.
• Development Environment & Tools:
  Daily use of Visual Studio and SQL Server Management Studio for bug fixing and new functionality development.
• Daily use of Azure Dev Ops and Git for source code management, version control, and collaboration.
• Database Administration & Optimization:
  Understand SQL Server and relational database principles to create, modify, and delete database objects; troubleshoot and address performance issues.
• Front-End Development:
  Possess strong JavaScript development skills; implement AJAX calls, form validation, DOM manipulation, and interactivity using JavaScript; style web applications using CSS and UI frameworks such as Bootstrap to create visually appealing interfaces.
• Collaboration & Mentorship:
  Collaborate with other developers, analysts, and stakeholders throughout the software development lifecycle; potentially mentor junior developers and share knowledge.

• Master’s degree in a relevant field and 12 years of relevant experience (with a portion in the last 2 years), or
• Bachelor’s degree and 14 years of relevant experience, or
• Associate degree and 16 years of relevant experience, or
• High school diploma and 20 years of relevant experience.
• Security Plus certified
• 10+ years of professional software development experience with a focus on .NET technologies
• .NET Core Expertise:
  Deep understanding and practical experience with .NET Core development
• C# Proficiency:
  Strong C# programming skills and object-oriented design
• EF Core & SQL Server:
  Experience with Entity Framework Core, Code First, Migrations, and SQL Server
• JavaScript & Front-End Technologies:
  Knowledge of JavaScript, HTML, CSS, and modern front-end frameworks (e.g., Bootstrap)
• Dev Ops Proficiency:
  Experience with Azure Dev Ops and Git for source control, CI/CD, and collaboration
• Problem-Solving:
  Strong analytical and problem-solving skills

• Current TS with SCI eligibility

• Understanding of ASP.NET Core 6.0 and related concepts (Razor Pages, Dependency Injection, Middleware)
• Knowledge of CSS and UI frameworks (Bootstrap, Flexbox)
• Experience reverse engineering legacy source code to implement priority bug fixes and enhancement requests
• Working knowledge of IIS and Web application deployments
• TS/SCI clearance

Amentum’s health and welfare benefits are designed to invest in you and in the things you care about. Eligible employees may elect medical, dental, vision, and basic life insurance. Employees may enroll in the company’s 401k plan, and, if eligible, a deferred compensation plan and Executive Deferral Plan. Benefits also include vacation, holidays, and stock purchase opportunities.

Base salary range: $143,000 to $175,000
. This range reflects the minimum and maximum target for new hire salaries for the position across all US locations. Individual pay is determined by location and factors such as skills, experience, and education.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity without regard to race, religion, color, sex, gender, national origin, age, veteran status, ancestry, sexual orientation, gender identity, marital status, medical condition including genetic characteristics or information, or disability. Learn more about your rights under Federal EEO laws and supplements.

Original Posting: 01/09/2026 - Until Filled. Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.