Codenaam: Gelderblom

It started with a dial-up connection and a dream. 1998. The web was a wild, untamed beast and GELDERBLOM rode it bareback. As Programming Director at World Online, he learned the cardinal rule: in the digital world, the one who controls the content controls the game.

Two years. Enough to master the terrain. Enough to know the enemy. Then — a new target appeared on the radar.

They called it America Online Benelux. GELDERBLOM called it his proving ground. As Director of Programming, he wasn’t just running campaigns — he was orchestrating a symphony of chaos across the most turbulent years the internet had ever seen. The dot-com bubble burst around him. Others fell. He adapted.

The lesson: the mission never stops. You pivot. You survive.

A brief stint with the giants of Warner Home Video. Online Marketing Consultant. But the operative was restless — too big for anyone else’s mission parameters. By 2004 the decision was made: go independent. Operate without a handler.

And so GelderblomWorks was born. A one-man intelligence unit accountable to no one but the client — and the data.

For over two decades, GELDERBLOM has run ops across every major digital theatre. Google. LinkedIn. Meta. TikTok. Spotify. Amazon. Bing. Wherever the target audience hides, he finds them. Wherever a conversion rate drops, he hunts it down.

His arsenal: SEO, SEA, GEO, Social Ads, Marketing Automation. His intelligence systems: Google Analytics 4, Google Tag Manager, custom Dashboarding — so precise his clients refuse to give them up. His approach: set the KPIs, prioritize ruthlessly, and leave no metric unexplained.

Agencies have tried to replicate him. None have succeeded.

TIMING UITZENDBUREAU — Target: flex worker recruitment at scale. GELDERBLOM deployed across eleven simultaneous channels. Google, Bing, LinkedIn, Meta, TikTok, SnapChat, Pinterest, Spotify, Indeed. Media planning. Automation pipelines via BullHorn, PipeDrive, MailChimp. The leads didn’t stand a chance.

CINEMEMBER — Target: arthouse film subscribers, the most elusive demographic in digital marketing. He cracked it. SEO. Video ads — edited himself, sound and all. Affiliate channels. GA4 dashboards. Mission: accomplished.

MYLER / HEADFIRST — Target: freelancers and interim professionals. Organic and paid channels synchronized like a precision strike. HubSpot. Active Campaign. Zapier. Content strategy built from scratch. The pipeline filled. The client smiled.

Thirty-plus clients over four years. Not one walked away dissatisfied.

Field-tested. Battle-hardened. Every tool a weapon, every metric a clue.

Languages spoken: Dutch (native), English (fluent), German (field-ready). Cover identities: musician, swimmer, cyclist, father of two. Weaknesses: none confirmed.