General information
Requisition # R67534 Locations USA-Remote Work Posting Date 05/06/2026 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 Architect 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 Architect, you will serve as a technical lead and subject matter expert for our most complex implementations. You will work as the Lead Architect—designing entire applications, complete solutions, 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 including, but not limited to metadata, workflows, security models, event processes, custom dashboards, reports, business rules, member formulas, relational database solutions, and all methods of data integration, conversion and migration artifacts, with a focus on enhancing system functionality and efficiency
Actively participating in all phases of the software development cycle (specifically full-scale OneStream platforms), ranging from systems analysis and design to development, configuration, testing, debugging, performance tuning, risk identification/remediation, and documentation to ensure the delivery of high-quality software solutions in a timely manner
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
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
Interviewing, hiring, developing, and training other OneStream consultants to advance their skill sets and capabilities enabling career advancement
Contributing to solution design and development of “products” that are positioned to clients to meet their requirements and presenting these solutions both internally and externally
Identifying, developing, and supporting opportunities for new contracts/clients and on contract growth at existing clients including participation in providing technical content, past performances, and level of effort estimates for RFIs, RFQs, and RFPs
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
OneStream Certified Professional (OCP)
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
Proficient with C# and/or VB.NET, to handle technical requirements of the role
SQL experience with SQL Server or Oracle databases, to manage and manipulate data effectively
Preferred Qualifications:
Master’s degree in computer science, engineering, or information systems
Experience creating software solutions for federal Planning, Programming, Budgeting, and Execution (PPBE) or financial management processes within the government sector utilizing Agile project methodologies, including defining Stories and estimating Story Points
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 including 5+ years of experience providing formal mentorship and managing the technical output of more junior consultants
Additional and relevant certifications: Certified Government Financial Manager (CGFM), Certified Defense Financial Manager (CDFM), and/or 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 careers@mantech.com and provide your name and contact information.