About Change Stack Advisory
Change Stack Advisory exists because too many change programmes never end up really changing anything.
Not because leaders lack intelligence or ambition, but because friction builds inside leadership systems and no one measures it.
We make that friction visible before value is at stake.
Our work sits at the intersection of:
Strategy execution
Leadership behaviour
Integration risk
Operating rhythm
We combine structured diagnostics with practical advisory to ensure clarity turns into action.
About Charlie Widdows
Charlie works with executive teams and investors navigating growth, transformation and integration.
He previously co-founded and exited Solverboard, an innovation management platform, and has worked inside complex organisations where execution risk isn’t theoretical but commercial.
His approach is grounded in proven leadership thinking (including Lencioni’s work on cohesive teams), but applied diagnostically rather than prescriptively. He starts with where you are, not where a model says you should be.
His work focuses on:
Surfacing leadership alignment gaps
Strengthening behavioural discipline
Establishing repeatable operating rhythm
Protecting value during integration
Based in Bristol. Working nationally. Often operating between leadership teams and boards.
