Manager, OneStream & Finance Transformation

About the role

Aquatech is seeking a hands-on Manager, OneStream & Finance Transformation to lead the implementation, ongoing management, and enhancement of OneStream and deliver improvements across finance and accounting processes. This role serves as the internal functional lead for OneStream and also supports other finance applications in the portfolio, partnering with Corporate Accounting, FP&A, IT, and implementation partners to support financial consolidation, close, budgeting, forecasting, and reporting. The manager translates business needs into practical system and process improvements, establishes sustainable support and governance, and drives user adoption. The role combines workstream leadership with hands-on application ownership, emphasizing reliable financial data, stronger controls, and reduced manual effort.

Responsibilities

• OneStream Implementation & Application Ownership – Lead the OneStream implementation workstream from requirements and design through data migration, testing, cutover, go-live, and stabilization; manage deliverables, risks, dependencies, and partner execution. Translate Accounting and FP&A requirements into application design, workflows, consolidation and planning processes, reports, and documented acceptance criteria. Own ongoing functional administration, including dimensions, hierarchies, metadata, workflows, data-load mappings, validation rules, and user support; coordinate security and access reviews with IT and control owners. Partner with technical teams on ERP integrations, business rules, and complex configuration. Validate source-to-OneStream mappings, historical data, opening balances, and reconciliation to approved financial records. Coordinate design and testing for consolidation, intercompany eliminations, currency translation, and reporting with Corporate Accounting; support budgeting and forecasting with FP&A. Manage the enhancement backlog, release testing, documentation, and support escalations to maintain a stable platform through close and planning cycles.
• Finance Application Support – Provide functional support for OneStream and other finance applications, including issue intake and triage, root-cause analysis, data and reporting corrections, and coordination of fixes with IT, vendors, and support partners. Support adjacent finance applications and integrations such as close and reconciliation, expense, procurement, billing, and finance reporting tools; maintain configuration knowledge, documentation, and user guidance for the applications owned by this role. Serve as a point of escalation during close, planning, and reporting cycles; monitor data loads, interfaces, and scheduled processes, and communicate status and resolution to Finance stakeholders. Manage