Senior OneStream Consultant

MANTECH

6d•$148,200 - $263,000•Remote

About The Position

MANTECH seeks a motivated, customer-oriented Senior OneStream Consultant for a fully remote role supporting mission-critical Planning, Programming, Budgeting, and Execution (PPBE) and Financial Close and Reporting solutions built on the OneStream platform. The consultant will act as technical lead and subject matter expert for complex implementations, architecting application modules, translating functional requirements into technical designs, and guiding Lead Consultants and Associate Consultants. The role owns application technical quality, including performance, security, and scalable data models. The consultant will lead architecture and implementation work, establish development standards, optimize custom rules and integrations, tune system performance, and advise government stakeholders on technical risks and solutions. The role also provides technical guidance and mentorship throughout the software development lifecycle in an Agile/Scrum environment.

Requirements

Bachelor’s degree in Computer Science, Systems Engineering, Information Systems, or a related field.
At least 10 years of progressive experience in systems design, infrastructure, performance tuning and optimization, administration, cloud architecture, software development, and deployment.
At least 5 years of hands-on OneStream development and technical lead experience on enterprise implementations, with a record of successful project delivery.
Advanced proficiency in object-oriented programming with VB.NET or C# for custom business rules and assemblies.
SQL expertise with SQL Server or Oracle, including complex data manipulation, query optimization, and staging table architectures.
Deep understanding of Corporate Performance Management (CPM/EPM), multidimensional OLAP cubes, and complex financial rules and consolidations.
U.S. citizenship and ability to obtain a Public Trust clearance or higher.
Ability to remain in a stationary position 50% of the time.
Ability to frequently communicate and exchange accurate technical information with co-workers, management, and customers, including during technical presentations and architecture reviews.

Nice To Haves

Master’s degree in Computer Science, Engineering, or Information Systems.
At least 4 years of OneStream XF installation, environment configuration, database management, and system optimization experience.
Experience with the federal PPBE process or federal financial management systems.
OneStream Certified Professional (OCP) Lead Architect or Core Platform certification.
Government Financial Manager (CGFM) or Certified Defense Financial Manager (CDFM) certification.
CompTIA Security+ certification.
Hands-on experience supporting government Authority to Operate processes and federal security baseline standards.
Prior experience in management consulting or professional services.

Responsibilities

Translate complex functional PPBE and government financial close requirements into technical architecture blueprints, system designs, and multidimensional data models designed for performance and scalability.
Own the technical quality of application deliverables; establish development standards, conduct code reviews, and enforce best practices across business rules, custom dashboards, and data integration pipelines.
Architect, write, and optimize custom Business Rules using VB.NET or C#, custom assemblies, and advanced SQL procedures.
Lead system health, memory, and query tuning; diagnose bottlenecks, troubleshoot application log traces, and optimize data loading and consolidation processing.
Direct end-to-end integration strategies, including automated data pipelines, REST API integrations, security roles and group architecture, Single Sign-On configuration, and preparation of Authority to Operate technical artifacts.
Serve as the primary technical subject matter expert in client-facing architecture sessions; identify project risks, develop mitigation strategies, and present solutions to senior government stakeholders.
Provide technical guidance, delegate tasks, and mentor OneStream Developers and Associate Consultants across the software development lifecycle in an Agile/Scrum environment.
Collaborate across MANTECH to understand client and team needs and deliver high-quality outcomes that exceed customer expectations.