Use Case – IT Systems Merger at Rive de Seine Habitat

Context

Following the merger of the Public Housing Offices (OPH) of Levallois, Puteaux, and Courbevoie, Rive de Seine Habitat had to unify its information systems while ensuring service continuity. The challenges were significant:

Heterogeneous IT systems inherited from the three OPHs, increasing the risk of service disruptions
Fragmented IT governance with misaligned tools and processes
Unoptimized IT spending due to redundant contracts and multiple vendors

The goal was to build a unified, secure, and high-performing IT system—while streamlining costs and improving IT governance.

Our Intervention

To support this transformation, we engaged a senior expert in IT system integration and public sector IT governance, with deep experience in OPH environments.

Our mission focused on four key levers:

IT Organization Review

IT Master Plan Development

Vendor Relationship Optimization

Results

Thanks to our intervention, Rive de Seine Habitat was able to:

Secure the IT merger without any service disruption
Rationalize the IT landscape by eliminating redundancies and standardizing tools
Achieve significant cost savings through contract optimization
Build a more agile IT team aligned with the group’s strategic priorities

This transformation gave Rive de Seine Habitat a unified, high-performing, and well-managed IT system, while strengthening its capacity for innovation in a post-merger context.

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