For Heads of GBS, COO and Sourcing Leaders
Your shared services were built for cost. AI and the workforce shift need a different design.
You already sense it: the playbook that built your GBS doesn’t answer where AI, geopolitical fragmentation and the talent shift leave you. The real question isn’t whether to change, but what to change first, and what can wait until the next contract cycle. After 30 years operating this from the inside, my conviction is simple: organisations that prepare for multiple futures outperform those that wait for certainty.
Marcel Mertens
Founder ResSer · Partner Whitebridge · Distinguished Fellow Avasant
·
My story
25+ years
across GBS, sourcing and CIO roles at ING, ABN AMRO and others
Global hubs · SWP
designed global delivery hubs and embedded forward-looking workforce planning inside major European banks
3 keynote stages
SSOW Europe 2026 · Everest Engage London 2025 · IndySource 2026
46 scenarios
in the ResSer Scenario Library, built for stress-testing SWP and sourcing
Three questions worth asking yourself
01 · Orchestration
Is your GBS already an orchestration layer, or still a delivery factory measured on FTE and unit cost?
02 · Scenarios
Do your SWP scenarios honestly include shrink-paths, location pivots and AI-driven role displacement, not just growth?
03 · Social
Are social KPIs in your sourcing contracts alongside SLAs and price, measurable and with consequences?
How we work · three building blocks
01
4D Resilience Framework
Assess against AI · Bio · Macro · Geopolitical disruption
A diagnostic instrument mapped onto four maturity pillars: organisation, processes, technology, suppliers. From "where are we now" to "where are we exposed".
02
Scenario Library
50+ scenarios: ranked, scored, contract-ready
Stress-test your sourcing and workforce strategy against concrete disruption scenarios, each scored on probability and exposure, with sourcing moves attached.
03
Resilience Playbook
Anticipate · Prepare · Prevail
Turn the framework and scenarios into action: SWP integrated, global hub patterns, flex-layer design, social KPIs in contracts.
Explore the services in depth →
Stop hoping for fair weather. Start designing for the storm.
— Marcel Mertens · ResSer
Explore
About
30 years across HP, Atos, ING and ABN AMRO, and why I started ResSer.
Services
The 4D Framework, Scenario Library and Playbook, and how an engagement works.
Cases
Concrete engagements: the challenge, the approach, the outcome.
Speaking
Keynotes on GBS, sourcing and resilience: SSOW, Everest, IndySource.