Contact Us

At Siller, we welcome conversations with leaders who are shaping tomorrow’s decisions. Please share your details, and our team will reach out to you within 3–5 business days. We look forward to connecting. 

Meet in Vienna

Although Siller is located just outside Vienna, we frequently meet international clients in Vienna by appointment. The city provides a central and well‑connected setting for professional discussions and project coordination.

Siller | Business and Management Consulting

Siller GmbH 

Established 2015 Austria 


Full Name: Siller Handels GmbH

Address: Gemeindeweg 47, Altenberg, 3422 Austria

Email: info@siller.gmbh


Company Register Number: FN 442495 d

Court of Registration: Regional Court of St. Pölten

VAT Number: ATU69992868

Date of Incorporation: 2015-10-29

Managing Director: Laszlo Siller

Managing Director: Agnes Peter

Shareholding: Laszlo Siller 75.5 %, Agnes Peter 24.5%


Siller is the consulting brand of Siller GmbH.

Who We Are

Siller is a business and management consulting firm based in Austria, serving Europe, the Middle East, and Asia. We are recognized for providing independent, objective valuations of companies and projects that give leaders the clarity and conviction to act decisively.

Our Firm

Our Leadership & Experts

 At Siller, every engagement is led by senior advisors. We are supported by an expert network of research associates, industrial specialists, engineers, lawyers, and tax advisors who provide in-depth analytical and technical expertise. Client communication and final delivery always remain with senior e

Leadership & Experts