OneStream Consultant

General information

Requisition # R69601 Locations USA-Remote Work Posting Date 07/31/2026 Security Clearance Required None Remote Type Fully Remote Time Type Full time

Description & Requirements

Elevate your career with MANTECH International Corporation! Join a dynamic team dedicated to national security through cutting-edge technology. Since 1968, MANTECH has led in delivering advanced solutions to government intelligence, the Department of Defense, and Federal Civilian sectors. Dive into innovation in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Your journey to impactful work and rapid growth starts now—be extraordinary at MANTECH!

***This is for a future opportunity***

MANTECH seeks a motivated, career and customer-oriented OneStream Consultant to join our team.

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) and Financial Close and Reporting solutions leveraging the OneStream platform. This is a fully remote opportunity.

As a Mid-Level OneStream Developer, you will build, test, and integrate core platform components and financial logic. Operating between entry-level configuration and senior platform architecture, you will own technical delivery for key modules, write custom business rules, design data integrations, and support compliance and security efforts.

Responsibilities include but are not limited to:

• Design, write, test, and troubleshoot custom OneStream Business Rules (Finance, Parser, Connector, Event Rules, and Member Formulas) using VB.NET or C# to implement complex financial calculations and client business logic.
• Configure and maintain Workflow Profiles, Confirmation Rules, Transformation Rules, and Data Management sequences to support complex financial reporting and budgeting processes (including federal budgeting standards where applicable).
• Build and customize Cube Views, BI Viewer dashboards, Extensible Documents, and custom reports to deliver accurate, actionable financial insights for executive leadership and operational management.
• Design, build, and optimize data conversion and data load artifacts, SQL scripts, database views, and staging tables for smooth data migration, extraction, and validation across all project phases.
• Support platform integrations, security model configuration, Single Sign-On (SSO) setup, and technical documentation required for system governance and compliance packages (e.g., ATO compliance).
• Actively participate in all SDLC phases (systems analysis, design, build, configuration, and testing); perform unit testing, root-cause trace analysis, and system performance tuning on application components and custom code.
• Identify technical risks, formulate mitigation options, and escalate unresolved blockers to project management to ensure high-quality software solutions and on-time project delivery.

Minimum Qualifications:

• Bachelor’s degree in Computer Science, Systems Engineering, Information Systems, or a related field.
• 5+ years of overall experience in software engineering, systems design, database management, cloud environments, or software deployment.
• 3+ years of hands-on OneStream development experience (or equivalent CPM/EPM platform development experience demonstrating a track record of successful project delivery).
• 1+ years of experience with OneStream XF configuration, installation support, or optimization.
• Proficiency in object-oriented programming using C# or VB.NET, along with practical SQL experience (SQL Server or Oracle) for data manipulation and querying.
• Functional understanding of Corporate Performance Management (CPM) or Federal Financial Management concepts (e.g., Consolidations, Budgeting/Forecasting, Reconciliation, PPBE).

Preferred Qualifications

• Master’s degree in Computer Science, Engineering, or Information Systems.
• OneStream Certified Specialist (OCS) in Reports & Dashboards or Financial Close, or OneStream Certified Professional (OCP) – Core Platform.
• Hands-on experience setting up Single Sign-On (SSO) and assisting with federal Authority to Operate (ATO) compliance procedures.
• Prior experience in professional services or federal IT consulting environments.
• CompTIA Security+ certification.

Clearance Requirements:

• US Citizenship with the ability to obtain a Public Trust clearance or higher.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Frequently communicates with co-workers, management, and government stakeholders, which may involve delivering technical presentations.
• Must be able to exchange accurate information in these situations.

The projected compensation range for this position is $94,800.00-$157,200.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.  In addition, MANTECH invests in its employees beyond just compensation.  MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.
MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.