Growth
transformation.
Delivered.

We deliver growth by empowering human capital and leveraging AI and data.

Learn more

Brownstone is a growth transformation collective with a focus on delivery and value creation. We are trusted advisors to the C-suite and support management teams in realizing their ambitions. Brownstone was founded by Google-veteran Jim Jansen.

What we do

We deliver growth transformations by empowering human capital and leveraging AI and data.

Growth Transformation Delivery

We design and deliver end-to-end growth transformation programs that create measurable, lasting impact.

Human Capital Empowerment

We unlock organizational potential by aligning talent strategy with business ambition.

AI, Data & Digital Advisory

We help organizations harness AI, data, and digital capabilities to build a sustainable competitive advantage.

Track record

We have worked with world-leading brands to translate strategy into concrete topline and EBITDA impact.

Global marketing transformation
Project in progress
Location
The Netherlands
Date
September 2025 – Present
Project Type
Global marketing transformation
Results
Implementing change management program · Accelerating adoption across teams · Significant topline impact and cost savings expected
Built a growth recommendation and transformation plan that identified potential for significant EBITDA uplift.
Location
The Netherlands
Date
September 2025 – November 2025
Project Type
Growth recommendation and transformation
Results
Potential EBITDA uplift identified
New business development
+€90M revenue
Location
The Netherlands
Date
September 2021 – November 2023
Project Type
New business development
Results
€90M revenue uplift
Growth strategy implementation
+€50M revenue
Location
New York
Date
November 2019 – March 2021
Project Type
Growth strategy implementation
Results
€50M revenue uplift · Acquired by Goldman Sachs

How we work

A three-step operating model focused on clarity, assembly, and execution.

Step 01

We understand your business

Through in-depth interviews and analyzing business processes, we develop a thorough outside-look-in.

Step 02

We assemble a world-class team

We operate with an agile bench model, assembling the ideal team for each specific challenge.

Step 03

We focus on hands-on delivery

We blend deep expertise with fast, practical execution. We don't just advise — we deliver.

The Brownstone Collective

A curated network of senior operators, industry leaders, and domain experts — assembled for impact.

Jim Jansen

Jim Jansen

Founder & CEO at Brownstone. Previously at Google and Unilever.

Stefano Maffei

Stefano Maffei

PMO Specialist at Brownstone. Previously at Nike and Capgemini.

Hein de Wilde

Hein de Wilde

AI & Data Specialist at Brownstone. Previously at Metyis.

Profile to be announced

Brownstone Expert

Profile details coming soon.

Profile to be announced

Brownstone Expert

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Profile to be announced

Brownstone Expert

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Profile to be announced

Brownstone Expert

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Profile to be announced

Brownstone Expert

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Profile to be announced

Brownstone Expert

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Profile to be announced

Brownstone Expert

Profile details coming soon.

Ready to drive
transformation?
Let's talk.

info@teambrownstone.com