Intermediate .NET Applications Developer (On-Site)

Oneida Professional Services is seeking an Intermediate Applications Developer to support the Defense Information School (DINFOS) Technology & Logistics Support Services contract at Fort Meade, Maryland. This position is responsible for designing, developing, testing, implementing, and maintaining custom and commercial off-the-shelf (COTS) applications that support DINFOS academic, administrative, and operational requirements.

The successful candidate will work closely with stakeholders, end users, and technical teams to develop innovative application solutions, improve existing systems, and support the full Software Development Life Cycle (SDLC). This role requires strong experience with .NET technologies, database development, web application security, and modern application development practices.

Key Responsibilities

• Design, develop, test, implement, and maintain custom and commercial off-the-shelf (COTS) software applications.
• Participate in all phases of the Software Development Life Cycle (SDLC), including requirements analysis, design, development, testing, deployment, and sustainment.
• Collaborate with stakeholders and end users to gather, analyze, and validate business and technical requirements.
• Develop prototypes, user interfaces, workflows, use cases, reports, and screen layouts to support application development efforts.
• Create, modify, and optimize relational databases to improve application performance, scalability, and reliability.
• Support application deployment activities and prepare development, test, and production environments.
• Troubleshoot application issues and provide ongoing maintenance and enhancement support.
• Develop technical documentation, design specifications, testing documentation, and user support materials.
• Ensure applications comply with organizational security requirements, coding standards, and best practices.
• Implement and maintain Section 508 accessibility compliance requirements for web-based applications.
• Support web content management activities and web application security initiatives.
• Perform additional duties and development activities as assigned by the Applications Manager.

Required Qualifications

• Experience developing and supporting enterprise software applications in a professional environment.
• Strong proficiency with Microsoft .NET technologies and application development frameworks.
• Experience with relational database design, development, optimization, and performance tuning.
• Knowledge of software development methodologies and SDLC best practices.
• Experience gathering and translating business requirements into technical solutions.
• Experience developing web-based applications and user interfaces.
• Understanding of application security principles, secure coding practices, and web application security requirements.
• Knowledge of Section 508 accessibility standards and requirements.
• Experience creating technical documentation and supporting application deployments.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent written and verbal communication skills.

Preferred Qualifications

• Bachelor’s degree in computer science, Software Engineering, Information Systems, or a related technical discipline.
• Experience supporting Department of Defense, military, federal government, or educational organizations.
• Experience with Microsoft SQL Server, database administration, and data modeling.
• Experience with C#, ASP.NET, MVC, .NET Core, Blazor, or related technologies.
• Familiarity with DevSecOps, CI/CD pipelines, source control systems, and automated testing tools.
• Experience with content management systems, cloud-based application environments, and modern web development frameworks.
• Relevant technical certifications in software development, cloud technologies, or cybersecurity.

Benefits (FEDERAL):

• 15 Days of Paid Time Off
• 11 Paid Holidays
• 401(k) Retirement Plan with Company Match
• Medical, Dental, and Eye Insurance
• Employee Referral Program
• Tuition Reimbursement
• Employee Assistance Program (EAP)
• Wellness Program
• Multiple Voluntary Medical Benefits

About Us:

The Oneida ESC Group is a family of companies owned by the Oneida Nation of Wisconsin that delivers customer-focused engineering, science, and construction services worldwide.

Our family of companies includes:

• Oneida ESC Group (OESC)
• Oneida Professional Services (OPS)
• Oneida Total Integrated Enterprises (OTIE)
• Mission Support Services (MS2)
• Sustainment & Restoration Services (SRS)
• Oneida Engineering Solutions (OES)
• General Mechanical Corporation (GMC)
• LG2 Environmental Solutions (LG2)
• Oneida Environmental (OE)

We integrate our staff for dedicated, cooperative, and business-like delivery of services to enhance our customers’ missions.

Equal Employment Opportunity:

Oneida ESC Group is an equal opportunity employer committed to inclusion and diversity in the workplace. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, or any other characteristic