Sr OneStream Developer
Confirmed on the employer's own hiring board on Oct 9, 2026. First seen by Alion on Sep 11, 2026. Guidehouse scores B on the Alion truth index.
Job Family:
Software Development & SupportTravel Required:
Up to 10%Clearance Required:
Ability to Obtain Public TrustWhat You Will Do:
Guidehouse is currently seeking a qualified OneStream Senior Developer to support Guidehouse's Defense & Security Segment. Responsibilities will include, but are not limited to:
Lead end-to end design, development, configuration, and deployment of OneStream applications that focus on financial close, financial reconciliation, and payroll management.
Develop and maintain OneStream Business Rules, Dashboards, Cube Views, Workflow configurations, and reporting solutions.
Conduct thorough analysis, mapping, migration, and validation of legacy Excel and Access data into OneStream applications while ensuring data integrity and reconciliation.
Collaborate with cross-functional teams to gather business requirements, prioritize features, and manage delivery of scalable solutions that enhance transparency and efficiency.
Lead OneStream system testing, deployments, troubleshooting, and ongoing production support.
Ensure all OneStream applications adhere to federal financial management standards, audit readiness requirements, and applicable compliance frameworks.
Lead technical workstreams and drive design decisions.
Mentor and guide junior developers and manage client relationships.
Participate in Agile ceremonies, manage backlog refinement, estimate development efforts and coordinate iterative development cycles to deliver high-quality solutions.
What You Will Need:
Must be able to OBTAIN and MAINTAIN a Federal or DoD "PUBLIC TRUST"; candidates must obtain approved adjudication of their PUBLIC TRUST prior to onboarding with Guidehouse. Candidates with an ACTIVE PUBLIC TRUST or SUITABILITY are preferred.
Bachelor’s degree in engineering, computer science, finance, accounting, data analytics, information systems, or a related field.
TEN (10) years of enterprise application development and implementation with deep expertise in solution design, performance optimization, integration, and complex business rule development.
FIVE (5) years of hands-on OneStream configuration and end-to-end implementation ownership.
OneStream Certified Associate (OCA) certification.
What Would Be Nice To Have:
OneStream Certified Lead Architect.
Certifications in Agile, Scrum, or project management (e.g., PMP, CSM, SAFe).
Experience integrating OneStream with SAP or other ERP systems.
Experience with API integrations and automation solutions and knowledge of ETL tools and data warehousing concepts.
Knowledge of GL accounting, financial close and consolidation processes, payroll accounting and accruals, account reconciliations, journal entries and reclassifications, and retroactive and corrective adjustments.
Understanding of federal financial management processes, audit readiness requirements, and compliance standards.
Excellent communication and stakeholder engagement skills, with the ability to translate technical concepts into business terms.
Experience serving as a functional and technical lead for enterprise application initiatives and can lead workshops, requirements gathering sessions, and user adoption initiatives.
Ability to mentor junior developers, business analysts, and business users.
What We Offer:
Guidehouse offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects our commitment to creating a diverse and supportive workplace.
Benefits include:
Medical, Rx, Dental & Vision Insurance
Personal and Family Sick Time & Company Paid Holidays
Position may be eligible for a discretionary variable incentive bonus
Parental Leave and Adoption Assistance
401(k) Retirement Plan
Basic Life & Supplemental Life
Health Savings Account, Dental/Vision & Dependent Care Flexible Spending Accounts
Short-Term & Long-Term Disability
Student Loan PayDown
Tuition Reimbursement, Personal Development & Learning Opportunities
Skills Development & Certifications
Employee Referral Program
Corporate Sponsored Events & Community Outreach
Emergency Back-Up Childcare Program
Mobility Stipend
About Guidehouse
Guidehouse is an Equal Opportunity Employer-Protected Veterans, Individuals with Disabilities or any other basis protected by law, ordinance, or regulation.
Guidehouse will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of applicable law or ordinance including the Fair Chance Ordinance of Los Angeles and San Francisco.
If you have visited our website for information about employment opportunities, or to apply for a position, and you require an accommodation, please contact Guidehouse Recruiting at 1-571-633-1711 or via email at [email protected]. All information you provide will be kept confidential and will be used only to the extent required to provide needed reasonable accommodation.
All communication regarding recruitment for a Guidehouse position will be sent from Guidehouse email domains including @guidehouse.com or [email protected]. Correspondence received by an applicant from any other domain should be considered unauthorized and will not be honored by Guidehouse. Note that Guidehouse will never charge a fee or require a money transfer at any stage of the recruitment process and does not collect fees from educational institutions for participation in a recruitment event. Never provide your banking information to a third party purporting to need that information to proceed in the hiring process.
If any person or organization demands money related to a job opportunity with Guidehouse, please report the matter to Guidehouse’s Ethics Hotline. If you want to check the validity of correspondence you have received, please contact [email protected]. Guidehouse is not responsible for losses incurred (monetary or otherwise) from an applicant’s dealings with unauthorized third parties.
Guidehouse does not accept unsolicited resumes through or from search firms or staffing agencies. All unsolicited resumes will be considered the property of Guidehouse and Guidehouse will not be obligated to pay a placement fee.