büro wien

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In 1991, the agency büro wien was founded by Michael Müllner and has become an integral part of the communications industry since then. With a strong and consistent team, years of experience and a distinctive signature, büro wien creates new standards in events, communication environments, promotions and consulting, nationally and internationally. Over the agency's history büro wien displayed innovation and courage on unusual productions and on undiscovered locations. büro wien has been awarded with 16 Event Awards, 2 EDwards and one National Award. Since 2012, büro wien is a licensee of the Austrian ecolabel for Green Meetings and Events. Together with our clients we create concepts to fit todays requirements and therefore save ressources and act sustainably.

In the 30th year of büro wien the company is extending its management level. The founder Michael Müllner remains the sole owner and director of the company. From May 2020 the experienced colleagues Mag. Alexandra Hörtler and Leila Kassoume, BA assist him as Managing Directors in finance, marketing, communication, human resources and organisational development.


Michael Müllner
Owner & Director

founder of büro wien 1991

various lectorships: FH JOANNEUM University of Applied Sciences, IMC FH KREMS University of Applied Sciences, Baku (Aserbaidschan), University of Vienna, Werbe Akademie, etc.

Mag. Alexandra Hörtler
Managing Director

former Tyrolean State Museum and Linz09 European Catpital of Culture

studied social science

core areas: marketing and corporate founding and development

Leila Kassoume-Kreiner, BA
Managing Director

academic studies: Bachelor Degree Program at University of Applied Sciences for Human Resources and Knowledge Management



Benjamin Berggold, MSc
Project Manager

Master degree in Strategy & Entrepreneurship in Lisbon.

Self-employed event production experience with a focus on music & art.

Sonja Dunkler
Office Management

former employers: Steuerberater Walter Laurer, Rechtsanwalt Dr. Franz Withoff


Stephanie Gindlstrasser, MA
Project Manager

bachelor´s degree in art history from University Vienna

master´s degree in exhibition design from FH JOANNEUM Graz

DI Bojana Milicevic
Project Manager

Master‘s degree in architecture from University of Technology Vienna

Core areas: architecture, design, architecture visualization

Maria-Luise Heindel
Guest Management

former employers: Vienna Insurance Group, Verein "Rettet den Stephansdom", ORF-Generalintendanz, Kronen Zeitung


büro wien
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