OneStream Developer

MANTECH seeks a motivated, career and customer-oriented OneStream Developer to join our team. This is a remote position.

At MANTECH, we are re-engineering the financial backbone of the U.S. Government. We provide highly configured, mission-critical Planning, Programming, Budgeting, and Execution (PPBE) solutions.

As an OneStream Developer, you will serve as a technical lead and subject matter expert for our most complex implementations. You will transition from pure building to architecting—designing entire application modules, translating functional requirements into technical blueprints, and guiding a team of associates to deliver high-performance solutions. You will own the technical quality of the application, ensuring performant business rules, streamlined security, and scalable data models.

Responsibilities include but are not limited to:

• Lead the design of application modules (e.g., Workforce, Capital, Capex), creating technical specifications that translate functional requirements into scalable OneStream architecture.
• Advanced Development: Write and optimize complex Business Rules of all types (Finance, Parser, Connector, Extender) and design sophisticated Workflow strategies to solve unique client challenges.
• Data Strategy & Integration: Design dynamic data load processes and Custom Tables for complex datasets; create Variance Analyses to validate data integrity between source systems and OneStream.
• Technical Leadership & Mentorship: Parse complex requirements into development tasks for Associate Consultants; conduct code reviews, teach troubleshooting techniques, and support junior staff in resolving helpdesk tickets.
• MarketPlace & Solutions: Configure and modify MarketPlace Solutions (e.g., People Planning, Task Manager) and integrate them into the core application.
• Reporting Strategy: Design and implement comprehensive reporting strategies using BI Viewer, Extensible Documents, and Cube Views, ensuring optimal performance and usability.

Minimum Qualifications:

• Bachelor’s degree in computer science, Systems Engineering, Information Systems, or related field.
• 5+ years of relevant experience in software development or financial systems implementation.
• 3+ years of dedicated OneStream implementation experience.
• 1+ years of OneStream XF installation, configuration, and optimization experience
• Advanced proficiency in VB.NET or C# and SQL.
• Deep understanding of OneStream architecture, including Data Management, Cube Design, and Security.

Preferred Qualifications:

• Experience with the federal Planning, Programming, Budgeting, and Execution (PPBE) process or financial management within the government sector.
• Experience assisting with ATOs, Single Sign-On (SSO), or working in a professional services/consulting firm.
• OneStream Certified Professional (OCP)
• CompTIA Security+ certification.

Clearance Requirements:

• Must be a U.S. Citizen and be willing and able to obtain a Public Trust.

Physical Requirements:

• Must be able to remain in a stationary position 50%
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations
• Must be able to exchange accurate information in these situations