Harro Willemsen in

Harro Willemsen

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Directeur at 3to1 Sales Artists
📍 The Randstad, Netherlands

Harro Willemsen is a senior sales trainer, author, and founder of 3to1 Sales Artists. An innovator in the sales profession, he designs new methodologies and training on topics like AI in sales. He is a graduate of Erasmus University Rotterdam, and people often describe him as passionate, creative, and intelligent.

Outside of his core training role, Harro is a prolific author of sales books, including the bestseller "The Par5 method. " He frequently shares his expertise through articles, a YouTube channel, and as a guest or host on various business podcasts, aiming to elevate the sales profession.

Unique fact: The name of his company, 3to1, represents his mission to help professionals achieve three times the results of an average performer.

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Experience
22 Years
Current Role
Directeur
Location
The Randstad, Netherlands
Personality Overview

How Harro shows up

Communication Style
Decision Approach
Work Preference

Behavioral traits and communication patterns that shape how this person evaluates opportunities, builds trust, and makes decisions in professional settings.

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Priorities

Topics Harro cares about

AI in Sales
Author of the book "AI voor sales" and actively discusses how artificial intelligence is changing the sales profession in his social media posts.
Sales Prospecting
A core area of his expertise, having authored multiple books on the subject, including "De Par5 methode" and "Het grote acquisitie praktijkboek".
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Career

Work history

5-2003
Directeur
3to1 Sales Artists
10-2016
Video’s en trainingsmethodieken op het gebied van verkoop, marketing, management, en presenteren.
3to1 Sales Artists
9-2006
Publicist
3to1 Sales Artists
9-2025
Auteur: AI voor sales
De Par5 methode
2-2019
Auteur: De Par5 methode
De Par5 methode
In the press

Media appearances

No media yetWe could not find public media appearances for this person.
Education
1990 - 1991
Bedrijfskunde
Erasmus University Rotterdam
1990 - 1991
none
Erasmus University Rotterdam
Social presence
in
Behavioral profile

DISC profile (public)

DISC behavioral profile

Dominance, influence, steadiness, and calculativeness scores with guidance on how this person prefers to communicate and decide.

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