Senior OneStream Consultant

MANTECH; United States; Remote; USD 150,000 - 230,000; Full time

Job summary

MANTECH seeks a Senior OneStream Consultant to lead complex PPBE and government financial close implementations remotely in the United States. You will architect modules, translate requirements into technical blueprints, and guide a team of consultants to deliver scalable, high-performance solutions.

You will own technical quality, enforce standards, and drive data integration, security, and SSO configurations while mentoring developers in an Agile/Scrum environment.

Qualifications

• Bachelor’s degree or higher in a relevant field.
• 10+ years in systems design, infrastructure, performance tuning, cloud architecture, software development, and deployment.
• 5+ years of hands-on OneStream development and technical lead experience.
• 4+ years of OneStream XF installation, environment configuration, database management, and system optimization.

Responsibilities

• Translate complex PPBE and government financial close requirements into technical architecture blueprints, system designs, and multidimensional data models (Cubes, Dimensions, Member Hierarchies) built for performance and scalability.
• Own the overall technical quality of application deliverables; establish development standards, conduct code reviews, enforce best practices across business rules, custom dashboards, and data integration pipelines.
• Architect, write, and optimize complex custom Business Rules (Finance, Parser, Connector, Event) using VB.NET/C#, custom assemblies, and advanced SQL procedures to extend platform functionality.
• Lead system health, memory, and query tuning efforts; diagnose bottlenecks, troubleshoot complex application log traces, and optimize data loading and consolidation processing times.
• Direct end-to-end integration strategies, including automated data pipelines, REST API integrations, security roles/group architecture, Single Sign-On (SSO) configuration, and Authority to Operate (ATO) technical artifact preparation.
• Serve as the primary technical SME in client-facing architecture sessions; identify technical project risks, articulate mitigation strategies, and present solutions to senior government stakeholders.
• Provide technical guidance, task delegation, and mentorship to OneStream Developers and Associate Consultants across the software development lifecycle within an Agile/Scrum environment.
• Listen carefully to client and team needs, look beyond immediate "easy" solutions, and work collaboratively across MANTECH to deliver high-impact, high-quality outcomes that exceed customer expectations.

Skills

OneStream development

Technical lead

VB.NET

C#

SQL

REST API integrations

Security architecture

Data modeling

Agile/Scrum

Education

Bachelor's degree in Computer Science

Master's degree

Tools

SQL Server

Oracle

Job description

MANTECH seeks a motivated, career and customer-oriented Senior OneStream Consultant to join our team. This is a fully remote opportunity.

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.

As a Senior OneStream Consultant, you will serve as a technical lead and subject matter expert for our most complex implementations. You will work as the Architect, designing entire application modules, translating functional requirements into technical blueprints, and guiding a team of Lead Consultants and Associate Consultants to deliver high-performance solutions. You will own the technical quality of the application, ensuring performance business rules, streamlined security, and scalable data models.

Responsibilities Include But Are Not Limited To

• Translate complex functional PPBE and government financial close requirements into technical architecture blueprints, system designs, and multidimensional data models (Cubes, Dimensions, Member Hierarchies) built for performance and scalability.


• Own the overall technical quality of application deliverables; establish development standards, conduct code reviews, enforce best practices across business rules, custom dashboards, and data integration pipelines.


• Architect, write, and optimize complex custom Business Rules (Finance, Parser, Connector, Event) using VB.NET/C#, custom assemblies, and advanced SQL procedures to extend platform functionality.


• Lead system health, memory, and query tuning efforts; diagnose bottlenecks, troubleshoot complex application log traces, and optimize data loading and consolidation processing times.


• Direct end-to-end integration strategies, including automated data pipelines, REST API integrations, security roles/group architecture, Single Sign-On (SSO) configuration, and Authority to Operate (ATO) technical artifact preparation.


• Serve as the primary technical Subject Matter Expert (SME) in client-facing architecture sessions; identify technical project risks, articulate mitigation strategies, and present solutions to senior government stakeholders.


• Provide technical guidance, task delegation, and mentorship to OneStream Developers and Associate Consultants across the software development lifecycle within an Agile/Scrum environment.


• Listen carefully to client and team needs, look beyond immediate "easy" solutions, and work collaboratively across MANTECH to deliver high-impact, high-quality outcomes that exceed customer expectations.

Minimum Qualifications

• Bachelor’s degree in Computer Science, Systems Engineering, Information Systems, or a related field.


• 10+ years of progressive work experience in systems design, infrastructure, performance tuning/optimization, cloud architecture, software development, and deployment.


• 5+ years of hands‑on OneStream development and technical lead experience on enterprise implementations, demonstrating a track record of successful project delivery.


• 4+ years of OneStream XF installation, environment configuration, database management, and system optimization experience.


• Advanced proficiency in object-oriented programming with VB.NET or C# for custom business rules and assemblies.


• SQL expertise (SQL Server or Oracle) for complex data manipulation, query optimization, and staging table architectures.


• Deep understanding of Corporate Performance Management (CPM/EPM) concepts, multidimensional OLAP cubes, and complex financial rules/consolidations.

Preferred Qualifications

• Master’s degree in Computer Science, Engineering, or Information Systems.


• Experience with the federal Planning, Programming, Budgeting, and Execution (PPBE) process or federal financial management systems.


• OneStream Certified Professional (OCP) – Lead Architect or Core Platform certification. Government Financial Manager (CGFM) certified or Certified Defense Financial Manager (CDFM).CompTIA Security+ certification.


• Hands‑on experience supporting government Authority to Operate (ATO) processes and federal security baseline standards.


• Prior experience in management consulting or professional services.

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 customers, which may involve delivering technical presentations and architecture reviews.


• Must be able to exchange accurate technical information in these situations.