Senior OneStream Architect (Remote)

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 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.