Senior OneStream Consultant

MANTECH; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

MANTECH seeks a Senior OneStream Consultant to lead complex OneStream implementations and guide a team of consultants in a fully remote setting. You will design modules, translate requirements into scalable blueprints, and ensure performance, security, and data integrity across multi-dimensional models.

The role demands deep expertise in VB.NET/C#, SQL, and OneStream architecture, with significant experience leading projects in an Agile/Scrum environment.

Qualifications

• 10+ years in systems design, performance tuning, and cloud architecture.
• 5+ years OneStream development and technical lead experience on enterprise implementations.
• 4+ years OneStream XF installation, environment configuration, and database management.
• Advanced proficiency in VB.NET/C# for custom business rules and assemblies.
• SQL expertise (SQL Server/Oracle) for complex data manipulation and optimization.

Responsibilities

• Translate requirements into technical architecture and multidimensional data models.
• Own technical quality, establish standards, and conduct code reviews across rules, dashboards, and data pipelines.
• Architect and optimize complex Business Rules using VB.NET/C# and advanced SQL procedures.
• Lead system health, performance tuning, and data loading optimizations.
• Direct end-to-end integration strategies including REST APIs, security, and SSO configurations.
• Serve as SME in client architecture sessions and mitigate technical risks.
• Mentor OneStream developers within an Agile/Scrum environment.

Skills

OneStream

VB.NET/C#

SQL

Architecture & Design

Leadership & mentoring

Agile/Scrum

REST API

Education

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

Master’s degree (preferred)

Tools

OneStream Platform

SQL Server/Oracle

VB.NET/C# tooling

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.