Title: OneStream Developer Location: USA-Remote Work Work Type: Remote, Full Time Job ID: R67102 Job Description Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH! MANTECH seeks a motivated, career and customer-oriented 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 an OneStream Consultant, you will serve as a technical lead and subject matter expert for our most complex implementations. You will transition from pure building to architecting—designing entire application modules, translating functional requirements into technical blueprints, and guiding a team of associates 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: - Lead the design of application modules (e.g., PPBE, Workforce, Capital, Capex), creating technical specifications that translate functional requirements into scalable OneStream architecture. - Write and optimize complex Business Rules of all types (Finance, Parser, Connector, Extender) and design sophisticated Workflow strategies to solve unique client challenges. - Design dynamic data load processes and Custom Tables for complex datasets; create Variance Analyses to validate data integrity between source systems and OneStream. - Parse complex requirements into development tasks for Associate Consultants; conduct code reviews, teach troubleshooting techniques, and support junior staff in resolving helpdesk tickets. - Configure and modify MarketPlace Solutions (e.g., Line Item Modeling, Task Manager, etc.) and integrate them into the core application. - Design and implement comprehensive reporting strategies using BI Viewer, Extensible Documents, and Cube Views, ensuring optimal performance and usability. - Consulting Mindset: Listen carefully to what others need (client and team members) and be willing and ready to respond to those needs to the best of your ability; look beyond the “easy” answer working collaboratively to bring the best Mantech has to offer to exceed others’ expectations. Minimum Qualifications: - Bachelor’s degree in computer science, Systems Engineering, Information Systems, or related field. - 5+ years of relevant experience in software development or financial systems implementation. - 3+ years of dedicated OneStream implementation experience. - 1+ years of OneStream XF implementation, configuration, and optimization experience - Advanced proficiency in VB.NET or C# and SQL. - Strong understanding of OneStream architecture, including Data Management, Cube Design, and Security Preferred Qualifications: - Experience with the federal Planning, Programming, Budgeting, and Execution (PPBE) process or financial management within the government sector. - Experience assisting with ATOs, Single Sign-On (SSO), or working in a professional services/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 $94,800.00-$157,200.00. 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.

• Support in standardizing documents and implementing process improvements, including the associated KPIs • Assist in creating new templates at local and global levels • Support evaluation of online surveys and development of potential solution proposals • Draft process descriptions and work instructions • Support the implementation of standardized processes, e.g., by training employees

• Creation and QC of study specifications for SDTM datasets, and statistical programming and QC of SDTM datasets for Phase I-IV trials. • Creation and QC of study specifications for ADaM datasets, and statistical programming and QC of ADaM datasets for Phase I-IV trials. • Statistical programming and QC of tables, listings and figures for Phase I-IV trials. • Responsible for the quality and timeliness of assigned statistical deliverables. • As Lead Statistical Programmer, primarily responsible for all statistical programming activities on assigned studies including planning and coordination of activities for assigned statistical programming team members. • Active participation in improvements to departmental processes and procedures. • Provide mentoring within the Statistical Programming team.

• Lead, support, and develop a high‑performing team through clear direction, trust, and regular feedback • Create a positive, inclusive team culture with strong ownership, accountability, and psychological safety • Proactively identify and remove impediments that slow down progress or reduce team effectiveness • Actively drive AI adoption within the team: • Enable and support the everyday use of AI tools and workflows • Lead by example through hands‑on usage to increase productivity and delivery speed • Coach individuals on growth, performance, and career development • Enable clear communication among team members and stakeholders • Facilitate planning, prioritization, and execution with an emphasis on achieving meaningful business outcomes rather than focusing solely on procedural adherence • Promote ongoing enhancement in work practices, collaborative efforts, and overall quality • Bridge technical and business discussions to ensure alignment and understanding