Senior OneStream Solution Architect

Remote from: USA
Salary, yearly, USD: 189,200 - 346,400
Department: DevOps & Infrastructure
Employment type: Full Time,
Job posted: 13 Jun 2026
Apply before: 13 Jul 2026
Experience level: Senior
Views / Applies: 29 / 4

ManTech delivers technology-driven innovation, develops game-changing solutions, and delivers mission-focused technologies for defense and federal civilian agencies.

Defense & Space
1968

Actively Hiring

AI Summary

This Senior OneStream Solution Architect role at MANTECH International Corporation involves designing and implementing complex financial management solutions using the OneStream XF platform. The position leads a team of consultants, translating functional requirements into technical blueprints, and owns the technical quality of applications. Responsibilities include developing business rules, dashboards, security models, and data conversions while working in an agile environment. The ideal candidate has over 10 years of systems design experience and at least 5 years of OneStream expertise. This remote position offers the opportunity to impact U.S. government financial systems.

Role DNA

Job Complexity

Easy Hard

Pace & Pressure

Relaxed Fast-paced

Autonomy Level

Guided Full Ownership

Communication Load

Independent Highly Collaborative

AI Insight The role requires deep technical expertise in OneStream, 10+ years of experience, and the ability to lead complex implementations, making it highly challenging.

Salary Analysis

AI Insight The offered salary range of $189,200 to $346,400 is significantly above the typical market range for similar roles ($150k-$250k), indicating a premium for specialized OneStream expertise and government sector experience.

Key Skills

OneStream Solution Architecture Financial Systems PPBE Agile Data Modeling Business Rules Security Models Dashboards Government Contracting

Cover Letter Sample

I am writing to express my strong interest in the Senior OneStream Solution Architect position at MANTECH. With over 10 years of experience in systems design and deep expertise in the OneStream XF platform, I am confident in my ability to drive the technical success of your complex implementations.

In my previous roles, I have led the architecture and delivery of PPBE and financial close solutions, designing scalable data models and performant business rules. I am adept at translating functional requirements into technical blueprints while guiding teams to exceed client expectations.

I thrive in agile environments and consistently prioritize a consulting mindset, listening carefully to client needs and collaborating to find the best solutions. Your mission to re-engineer the financial backbone of the U.S. Government aligns perfectly with my passion for impactful work.

I am eager to bring my technical leadership and OneStream mastery to MANTECH and contribute to your legacy of innovation. Thank you for considering my application.

Possible Interview Questions

Can you describe your experience designing and implementing a complex OneStream application from scratch?

I led the architecture of a full PPBE solution for a large government agency, including data integrations, business rules, security, and dashboards. I translated functional requirements into a technical blueprint, oversaw a team of consultants, and ensured performance optimization.

How do you approach troubleshooting a performant business rule in OneStream?

I start by analyzing the rule's logic and data flow, using OneStream's debugging tools to identify bottlenecks. I review member formulas and ensure efficient use of API functions. I also consider the data volume and indexing, and test in a sandbox environment before deploying fixes.

Describe a time you mitigated a significant project risk. How did you handle it?

In one project, we faced data quality issues that threatened the timeline. I escalated to project management, proposed a data validation framework, and collaborated with the client to clean the source data. We adjusted the schedule and implemented automated checks, which reduced risk and ensured on-time delivery.

How do you ensure your team maintains high technical quality in a fast-paced agile environment?

I set clear coding standards, conduct regular code reviews, and use automated testing where possible. I also prioritize knowledge sharing through pair programming and daily stand-ups. I encourage the team to raise technical debt early and allocate time for refactoring.

Can you explain how you would design a security model for a OneStream application with multiple user roles?

I start by defining user groups based on functional requirements (e.g., administrators, planners, executives). I then create security profiles with appropriate permissions for cubes, forms, and reports. I use dynamic access control where possible and test the model with real users to ensure it meets their needs without being overly restrictive.

General information

Requisition #

R68653

Locations

USA-Remote Work

Posting Date

06/12/2026

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!

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

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 performant business rules, streamlined security, and scalable data models.

Responsibilities include but are not limited to:

Applying advanced theoretical knowledge of Computer Science and Engineering principles to proficiently develop, write, test, troubleshoot, and document code and interfaces for financial management applications using the OneStream XF platform
Developing and troubleshooting a variety of components that include security models, event processes, custom dashboards, reports, business rules, and member formulas, with a focus on enhancing system functionality and efficiency
Actively participating in various phases of the software development cycle, ranging from systems analysis and design to development, configuration, testing, debugging, and documentation, to ensure the delivery of high-quality software solutions
Designing and creating financial reports and dashboards based on specific client requirements while adhering to industry best practices to ensure the delivery of accurate and meaningful insights
Identifying potential project risks, providing risk mitigation options, and escalating unresolved risks to project management to ensure timely resolution and minimal impact on project timelines
Designing and building data conversion and data load artifacts throughout various project phases, to ensure smooth data migration and accuracy
Continually expanding your knowledge of OneStream through comprehensive training, financial processes, and industry best practices, to stay abreast of the latest trends and enhance your professional growth
Working in an agile environment, applying agile practices, and actively participating in daily stand-ups and scrum activities to foster collaborative and efficient project management
Experience leading with a Consulting Mindset: listening carefully to what others need (client and team members) and being willing and ready to respond to those needs to the best of your ability; looking beyond the “easy” answer working collaboratively to bring the best Mantech has to offer to exceed others’ expectations.

Minimum Qualifications:

A bachelor’s degree in computer science, Systems Engineering, or Information Systems or related field
10+ years of work experience in systems design, infrastructure, tuning/optimization, cloud, development, and deployment
5+ years of relevant OneStream experience or comparable experience performing software development, demonstrating a track record of successful project delivery
4+ years of OneStream XF installation, configuration, and optimization experience
Familiar with C# or VB.NET, to handle technical requirements of the role
SQL experience with SQL Server or Oracle databases, to manage and manipulate data effectively
Strong analytical and problem-solving abilities, to navigate through complex situations and provide effective solutions

Preferred Qualifications:

Master’s degree in computer science, engineering, or information systems
Experience with the federal Planning, Programming, Budgeting, and Execution (PPBE) process or financial management within the government sector.
VB.NET development experience and/or any object-oriented programming languages
Experience assisting with ATOs and setting up Single Sign-On for applications
Work experience in a professional services company and/or a consulting firm
OneStream Certified Professional (OCP).
Certified Government Financial Manager (CGFM) or Certified Defense Financial Manager (CDFM).
CompTIA Security+ certification.

Clearance Requirements:

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

Physical Requirements:

Must be able to remain in a stationary position 50%
Frequently communicates with co-workers, management, and customers, which may involve delivering presentations
Must be able to exchange accurate information in these situations

The projected compensation range for this position is $189,200.00-$346,400.00. 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 [email protected] and provide your name and contact information.

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