Resource · Case study

Stabilizing a credit union's Marketo instance in four months

A regional credit union inherited a Marketo instance with 356 duplicate fields, 139,000 undocumented records, and no way to attribute revenue. Here is what the first phase fixed and how the roadmap was sequenced.

By Ashley Rosulek6 min readUpdated October 2026

Anonymized. Client details available under NDA.

The engagement started where most do: the platform was in use, but nobody trusted it. Marketing leadership wanted three things: resolve the usability failures that were slowing the team down, reduce audit and compliance risk, and get to a point where modern marketing (preference management, personalization, chat) was possible.

What we found

AreaBefore
Data modelNo data dictionary. 356 duplicate fields.
Database139,054+ records created by an integration with no documentation of what they were or why.
ComplianceNo deceased-member suppression. No written procedures and no proof of opt-in.
Attribution151,966 leads with no acquisition program, so no way to tie marketing to outcomes.
DeliverabilityNo DMARC policy in place.
AccessManual user management; no single sign-on.
ReportingInconsistent success definitions across programs; reporting anomalies nobody could explain.

What phase one delivered

Four months, foundation first.

47,711
low-value records purged or queued under legal hold
~80%
of fields mapped and documented in a published data dictionary
100%
of a five-category segmentation model built and live

How the roadmap was sequenced

The order is the lesson. Nothing in phase four is possible until phases one and three are done.

PhaseFocusContents
1 · BuildFoundationAudit, usability fixes, the 47K cleanse, segmentation
2 · Enable & launchAdoptionTraining and documentation, preference center and compliant footers, a 90-day chat pilot
3 · Govern & secureRiskDMARC, single sign-on and provisioning, written procedures and a RACI
4 · Scale & attributeMeasurementMulti-touch attribution, personalization at scale
The open items were named, not hidden

At the end of phase one, the risks still outstanding were listed plainly for leadership: the missing DMARC policy, the absence of procedures and opt-in proof, the 151,966 leads without an acquisition program, and manual access control. A roadmap that only lists wins is a sales deck.

What to take from this

  1. Publish the data dictionary before you clean anything. You cannot decide what to delete until you know what the fields mean.
  2. Cleanse in categories (deceased, unmarketable, inactive) with counts for each. It makes the decision defensible and the legal-hold conversation short.
  3. Write the one or two principles that settle recurring arguments, such as which system wins when preferences conflict.
  4. Sequence governance before attribution. Attribution built on an ungoverned instance will be rebuilt.

Want this done in your instance? Most engagements start with an audit.

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