Software Developer (.NET) (Sign-on Bonus Eligible)

Amentum; Fort Meade (MD); On-site; USD 140,000 - 147,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Job summary

Amentum is seeking a Software Developer to join our team at Fort Meade, MD. You will support mission-critical projects that impact the Nation’s security and intelligence mission, focusing on SENTINEL—a web-based application to track counterintelligence entities and relationships.

The role requires deep expertise in .NET Core, C#, SQL Server, EF Core, and front-end technologies like JavaScript and Bootstrap.

Qualifications

• Master’s degree with 12+ years’ relevant experience (or Bachelor’s 14+ years).
• Security Plus certified.
• 10+ years professional software development with a focus on .NET technologies.
• Strong C# and .NET Core expertise.
• EF Core, SQL Server experience.
• JavaScript, HTML, CSS, Bootstrap front-end skills.
• Azure DevOps and Git experience.

Responsibilities

• Develop new software solutions for SENTINEL using C#.
• Maintain and enhance SENTINEL functionality.
• Design and architect new features and components.
• Develop enterprise-level web applications using .NET Core, Razor Pages, DI, Web APIs.
• Manage data with EF Core and SQL Server.
• Collaborate with developers and stakeholders; mentor juniors.

Skills

C#

.NET Core

SQL

JavaScript

HTML

XML

EF Core

Bootstrap

Razor Pages

Git

Azure DevOps

Education

Master’s degree

Bachelor’s degree

Associate degree

High school diploma

Tools

Visual Studio

SQL Server Management Studio

Azure DevOps

Git

IIS

Web APIs

Job description

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

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 Software Developer to join our team of passionate individuals 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), Hypertext Markup Language (HTML), and Extensible Markup Language (XML).
The .NET Core Developer will be a key contributor to the development and maintenance of SENTINEL, a web-based application used to track counterintelligence related entities and their relationships. This role requires an exceptional developer with deep expertise in .NET Core, C#, and related technologies.
Responsibilities:

• Software Development:
• Develop new, cutting-edge software solutions for SENTINEL utilizing strong 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 Entity Framework (EF) Core, Code First, Migrations, and LINQ syntax 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 DevOps and Git for source code management, version control, and collaboration.
• Database Administration & Optimization:
• Utilize a strong understanding of SQL Server and relational database principles to create, modify, and delete database objects.
• Troubleshoot and address database performance issues.
• Front-End Development:
• Possess exceptional JavaScript development skills.
• Implement AJAX calls, form validation, DOM manipulation, and interactivity using JavaScript.
• Style web applications utilizing CSS and UI layout frameworks such as Bootstrap 5 to create visually appealing and consistent user interfaces.
• Collaboration & Mentorship:
• Collaborate with other developers, analysts, and stakeholders throughout the software development lifecycle.
• Potentially mentor junior developers and share knowledge.
  

Requirements:

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

Clearance Required:

• Current TS with SCI eligibility
  

Preferred:

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

#javelin

Pay Transparency VerbiageAmentum’s health and welfare benefits are designed to invest in you and in the things you care about. Your health. Your well-being. Your security. Your future. Eligible employees and their dependents may elect medical, dental, vision, and basic life insurance. Employees are able to enroll in our company’s 401k plan, and, if eligible, a deferred compensation plan and Executive Deferral Plan. Employees will also receive 17 days of vacation per year, seven paid holidays, plus floating holidays and caregiver leave. Hired applicants will be able to purchase company stock and have the opportunity to receive a performance discretionary bonus.
The base salary range for this position is $140,000 to $147,000. This range reflects the minimum and maximum target for new hire salaries for the position across all US locations. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training.
US EEO Statement
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, religion, color, sex, gender, national origin, age, United States military veteran’s status, ancestry, sexual orientation, gender identity, marital status, family structure, medical condition including genetic characteristics or information, veteran status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal EEO laws and supplemental language at EEO including Disability/Protected Veterans and Labor Laws Posters.
Compensation Details:$140,000 - $147,000
The compensation range or hourly rate listed for this position is provided as a good‑faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.
Benefits Overview:Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:04/10/2026 - 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.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.