OneStream Specialist

Company Overview Main Street Capital Corporation (NYSE:MAIN) is a publicly traded principal investment firm with over $8.5+ billion of capital under management. Main Street primarily provides customized long‑term debt and equity capital solutions to lower‑middle‑market companies and private companies owned by or in the process of being acquired by a private equity fund. Main Street’s portfolio investments typically support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies across diverse industry sectors. Main Street seeks to partner with entrepreneurs, business owners and management teams, generally offering "one stop" financing alternatives within its lower‑middle‑market investment strategy. The firm also partners with private equity fund sponsors, investing mainly in secured debt through its private‑loan strategy. The private‑loan portfolio companies generally have annual revenues between $25 million and $500 million. Main Street has consistently ranked as a Top 100 Place to Work in Houston, ranked in the top 100 in 2025, 2024, 2023 and 2022 within the small‑company ranking category by the Houston Chronicle. It was also listed on the Houston Chronicle’s "CHRON100" top performing Houston‑based publicly‑traded companies. Trust, friendliness, conscientiousness, and fun are embedded in Main Street’s culture. The company sponsors regular activities for employees, fostering personal friendships, bonds and workplace happiness. It strives to create meaningful experiences where employees can be themselves and connect with peers, promoting collaboration and driving performance. Culture is considered a secret ingredient to the company’s 20‑year success. We’re currently looking for a OneStream Specialist who brings attention to detail, strong work ethics and organizational skills. The ideal candidate will be a self‑starter with a positive attitude, focused on completing tasks efficiently and effectively in a deadline‑sensitive environment. Position Summary We are seeking a hands‑on OneStream Administrator to support our FP&A and finance teams in managing and enhancing our financial system’s environment. This role will play a key part in onboarding new portfolio companies, maintaining financial structures, and ensuring accurate, scalable reporting across a complex investment platform. Responsibilities OneStream Administration & FP&A Support Partner closely with FP&A to support day‑to‑day OneStream activities Build and onboard new portfolio companies into OneStream, including: Entity setup Financial package development Metadata and dimensional configuration Maintain and enhance the platform, including: Adding and mapping new GL accounts Updating hierarchies and metadata Creating and maintaining Cube Views and dashboards Support ongoing reporting needs, including recurring and ad hoc financial packages System Maintenance & Enhancements Own updates to mappings, transformations, and data integration processes Troubleshoot data issues and ensure integrity across the system Rebuild or reconfigure models as portfolio companies transition between ERP systems Continuously improve system performance, usability, and scalability Entity Structures & Consolidation Support Support complex legal and management entity structures, including pro forma entities Assist with consolidation processes and reporting accuracy Partner with finance to ensure proper treatment of intercompany and ownership structures Ownership & Implementation Take ownership of OneStream‑related initiatives and enhancements Act as a key contributor in system implementations, upgrades, and process improvements Collaborate cross‑functionally with FP&A, accounting, and IT Skills & Qualifications Required Bachelor’s degree in MIS, Information Systems, or a related field Strong systems aptitude with hands‑on experience in financial systems or EPM platforms Experience supporting FP&A or finance teams in a systems capacity Working knowledge of financial reporting, general ledger structures, data mapping and transformations Ability to manage multiple priorities in a dynamic, fast‑paced environment Strong problem‑solving skills and attention to detail Preferred Direct experience with OneStream Experience with financial consolidations and reporting tools (e.g., Hyperion, Oracle, or similar) Background in investment management, private equity, or financial services Experience supporting complex entity structures and multi‑entity environments Familiarity with Cube Views, business rules, and data integrations Why join Main Street’s growing team? Unique and differentiated lower‑middle‑market investment strategy Supportive and dynamic team‑based work environment At Main Street, we’re committed to creating an environment where employees can thrive both professionally and personally. We offer comprehensive medical, dental, and vision coverage effective on the first day of employment. Our competitive compensation package includes bonus opportunities, restricted stock awards, and fully employer‑paid life insurance, short‑term disability, and long‑term disability coverage. Employees start with 15 days of paid time off, 12 company holidays, and receive an immediate 401(k) employer match beginning the first of the month following hire date—without any vesting schedule. We support professional development by covering licensing and continuing education costs, 100% company‑paid parking, on‑site gym access, a scholarship program for dependents, volunteer time off for charitable and volunteer activities, paid parental leave, and backup caregiving services, among many other benefits designed to support your well‑being and success. Location Corporate Office: 1300 Post Oak Blvd, 8th Floor, Houston, TX 77056 (Uptown/Galleria area). Our Commitment Main Street Capital Corporation is an equal‑opportunity employer committed to diversity in recruiting, hiring, developing, compensating, and promoting applicants and employees. All employment decisions are made without regard to sex, race, color, religion, national origin or ancestry, citizenship, age, disability, marital or veteran status, sexual orientation, gender identity or expression, or any other legally protected categories. #J-18808-Ljbffr Main St. Capital Corporation