From Six Platforms to One

Growth by acquisition is a strategy. It is rarely a system architecture. For one large midstream energy company — a publicly traded operator with billions in revenue, hundreds of legal entities, and accounting hubs in two states — every deal closed had added another ERP, another sub-ledger, another spreadsheet, and another version of the truth.

By the time the executive team engaged Taligens, the back office was running six platforms in parallel: Oracle E-Business Suite, Microsoft Dynamics AX, Hyperion HFM, a standalone planning tool, a legacy invoice imaging system, and a homegrown BI environment. Month-end was a logistical exercise. Real-time visibility into cash, payables, and operating performance was effectively impossible.

Twenty-two months later, the company was operating on a single Oracle Cloud platform spanning fourteen-plus modules, one rationalized chart of accounts, a unified master-data governance model, and a procure-to-pay workflow powered by automated OCR. We delivered it through a global pandemic and a parallel internal reorganization — without missing a phased go-live.

The symptoms read like a textbook of legacy ERP debt: a month-end close that spanned multiple consolidation tools and depended on offline extracts; no automated segregation-of-duties controls; reconciliations performed manually in spreadsheets; no formal source-to-pay process; fixed-asset tracking unable to proactively manage capital authorizations; and budgeting locked inside Excel templates with no driver-based modeling capability.

Thirty-plus legal entities. Multiple chart-of-account variants inherited from each acquisition. Duplicate vendor and customer records across business units. SOX documentation that consumed entire weeks per cycle.

The next acquisition was already being negotiated. The company needed a platform that could absorb new entities into existing structures — rather than reshape itself around each deal. The brief was clear: consolidate, rationalize, and build for the future.

We structured the transformation across four phases — core financials, consolidation and reconciliation, and capital projects and planning — with explicit quality gates between each. The methodology held three principles without exception: configure, don't customize; review, fix, build, repeat; and show, don't tell. Every storyboard, every control point, every training session walked through a live system — never a static deck.

Each phase ran through three instrumented control points — at 30%, 70%, and 99% build completion — tied to documented test scenarios. By Phase 1 alone, approximately 160 accounts-payable test cases had been executed across supplier setup, invoice entry, OCR scanning, intercompany flows, bank interfaces, and payment processing, each mapped to a requirements traceability identifier.

When the pandemic struck one week before the first control-point launch, we compressed an eight-week pilot into four, redistributed scope across the next gate and UAT, re-issued every invitation within 48 hours, and moved the program to a hybrid model. The Master Test Plan, Issue Tracker, and daily summary cadence ran exactly as planned across both geographies. The pilot hit its objectives. The broader program did not slip.