Journeyman OneStream Consultant

MANTECH seeks a motivated, career and customer-oriented Journeyman OneStream Consultant 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 and Financial Close and Reporting solutions leveraging the OneStream platform.

As an OneStream Consultant, 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., PPBE, 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., Line Item Modeling, Task Manager, etc.) and integrate them into the core application.

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