Marcin Piecewicz in

Marcin Piecewicz

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Member of the Supervisory Board at oS3
📍 Warsaw, Mazowieckie, Poland

Marcin Piecewicz is the CEO of ONE House Group, a marketing and communications agency he has led since 2013. He focuses on strategic growth, including M&A activities and international expansion. A graduate of the University of Warsaw with a background in Behavioural Economics, people describe him as a results-oriented, open-minded, and self-motivated manager.

Marcin is committed to corporate social responsibility, championing his agencys involvement in the Ad Net Zero initiative to reduce carbon emissions in the advertising industry. He also prioritizes employee development, establishing training programs like Marcus Academy and StażUp to foster talent and share practical marketing knowledge.

His agency, ONE House, is recognized as a Google Premier Partner, placing it in the top 3% of partner agencies.

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Experience
25 Years
Current Role
Member of the Supervisory Board
Job Level
Leadership
Location
Warsaw, Mazowieckie, Poland
Personality Overview

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Communication Style
Decision Approach
Work Preference

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Priorities

Topics Marcin cares about

Agency Growth
He is actively growing his company through an M&A strategy and expanding into international markets, recently earning a "Forbes Diamond" award for dynamic growth.
Digital Marketing
His agency achieved Google Premier Partner status, a distinction for the top 3% of partners, highlighting his focus on high-quality digital campaign performance.
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Career

Work history

10-2022
Member of the Supervisory Board
oS3
2-2021
CEO
Silver Agency
4-2013
CEO
ONE House
2-2009
Owner
Platinum Consulting
11-2008 - 1-2012
Marketing Services Director
US Pharmacia
In the press

Media appearances

CEO ONE House, Marcin Piecewicz laureatem #TopThinkers 2021. Featured in ONE House
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Education
2003 - 2006
Doctoral studies
University of Warsaw
2002 - 2003
Postgraduate Studies „Behavioural Economics”
University of Warsaw
Social presence
in
Behavioral profile

DISC profile (public)

DISC behavioral profile

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