About Callista

Callista is a partner-managed IT company headquartered in Switzerland that specializes in providing experts, dynamic teams and managed capacity solutions for consulting, engineering and operational services.

We combine the proximity and quality of a Swiss partner with the scalability of our nearshore center in Serbia. This model offers you maximum flexibility – cost-effective, reliable and future-proof. With a strong network that extends from Switzerland to Germany and the Balkan region, we strike the perfect balance between local presence and international efficiency.

Callista is an partner-managed IT company headquartered in Switzerland that specializes in providing experts, dynamic teams and managed capacity solutions for consulting, engineering and operational services.We combine the proximity and quality of a Swiss partner with the scalability of our nearshore center in Serbia.

MICA Mindset

MASTERY

Competent & Ambitioned

We can only achieve the best results with the best people. After all, the success of a project always depends to a large extent on the people who work on it. That is why we at Callista consistently rely on employees with above-average professional and personal skills and ambition.

INTEGRITY

Entrepreneurial and Fair

Our unwavering goal is always the sustainable business success of all those involved - for our clients as well as for ourselves. This attitude has always been our driving force. That is why we at Callista always think and act entrepreneurially and fairly. Because we can only be successful together if it is advantageous for everyone involved.

CARING

Tailor-made & Personal

Tailor-made solutions for the individual challenges of our clients are important to us. That's why we focus on tailor-made solutions for projects, both in terms of the approach and the result, which we always develop in close personal exchange with our clients and experts.

AGILITY

Lean & Efficient

The leaner and more efficiently we achieve our goal, the more fulfilling the project work and the more satisfying the result for everyone involved. That is why at Callista, we organise ourselves as lean and efficiently as possible.

Numbers

50+

Clients

2010

Founded

150+

Experts

700+

Engagements

Leadership

Jethro I. Oudenbroek

Chairman

Dr. Roland Pieringer

Member of the Board

Andreas Gisler

Managing Director

Peter Stampfli

Managing Director

Philip Achermann

Managing Director

The Team Supporting our Growth

Jennifer Mayer

HR & Backoffice

Marc Lauener

Corporate Services /
Executive Assistant

Anna Garevskikh

HR & Payroll

Goergis Halef

Key Account Manager

Sven Roth

COO

David Blam

Head Delivery

Ozleyis Cantekin

Recruiter

Renata Zeqiri

Recruiter /
Account Manager

Dusan Jovanovic

Recruiter

Thorsten Stockner

Recruiter

Advisory Council

Today’s problems are usually complex and require different perspectives. The Advisory Council deals with practical technical issues and brings those different views to the table. Topics such as data engineering, enterprise agility, software engineering and CRM are discussed.

The Callista Advisory Council aims to bring together experts from different disciplines and backgrounds.

Stephan Kiefer, Head Advisory Council

"The Callista Advisory Council has set itself the goal of bringing together experts from different disciplines and backgrounds."

General Guisan Strasse 8

6300 Zug, Switzerland

Balkanska 2

Belgrade, Serbia

Contact

+41 43 540 56 85

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© 2025 Callista

© 2025 Callista