Only the right path leads to the solution.

COMPLIANCE & FRAUD

Compliance breaches – we’re here to support you!

We perform customized investigative work and information acquisition, securing evidence in the event of damage.

INTELLECTUAL PROPERTY

We place our main focus in this area on the investigation of patent, trademark, and design right infringement, as well as competition law.

 

REPUTATION & THREAT

Public figures have commissioned us to identify the source of reputation-damaging comments and statements. We were successful in ascertaining the responsible parties.

HISTORY

On 28 June 1948, DETEKTEI-HOLLER was founded as a one-man business in Bielefeld by Karl Holler.

Karl Holler not only led his detective agency from its humble beginnings to a successful business, he was also one of the first members of today’s

Bundesverband Deutscher Detektive e.V.  (federal association of German detectives) and simultaneously served as its president.

MEMBERSHIPS

LEARN MORE

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FSPD Fachverband Schweizerischer Privat-Detektive

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ÖDV

Österreichischer Detektiv-Verband

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W.A.D.

World Association of Detectives, Inc.

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Affiliated to

Int. Kommission der Detektivverbände

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Allianz für Sicherheit in der Wirtschaft Baden- Württemberg e.V.

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Allianz für Sicherheit in der Wirtschaft Nordrhein-Westfalen e.V.

GET IN TOUCH WITH US

If you would like personal advice, have questions about our services or specific concerns, you can contact us by phone, e-mail or fax using the contact information below.

 

Holler Research GmbH

Beckhausstr. 168

33611 Bielefeld

Germany

 

Phone: +49 521 821 60

Fax: +49 521 874 945

Office@Holler-Research.com

ABOUT US. 70 YEARS OF INDIVIDUAL INVESTIGATIVE WORK – THAT IS OUR STRENGTH!

Since our establishment, we have been successful in our efforts to protect the entrepreneurial and competitive goals of our clients internally and externally, sheltering them nationally and internationally from damage  through  appropriate

and efficient investigative approaches.

 

We are a well-coordinated team and, as such, conduct customized investigations and secure relevant information and evidence.

Our investigations demonstrate our very own signature. Owing to this and the discrete nature of our work, many of our customer relations have become trusting relationships over three generations.

LEARN MORE

Compliance breaches – we’re here to support you!

We perform customized investi-gative work and information acquisition, securing evidence in the event of damage.

LEARN MORE

We place our main focus in this area on the investigation of patent, trademark, and design right infringement, as well as competition law.

 

LEARN MORE

Public figures have commissioned us to identify the source of reputation-damaging comments and statements. We were successful in ascertaining the responsible parties.

LEARN MORE

On 28 June 1948, DETEKTEI-HOLLER was founded as a one-man business in Bielefeld by Karl Holler.

Karl Holler not only led his detective agency from its humble beginnings to a successful business, he was also one of the first members of today’s .................

Bundesverband Deutscher Detektive e.V.  (federal association of German detectives) and simultaneously served as its president.

Since our establishment, we have been successful in our efforts to protect the entrepreneurial and competitive goals of our clients internally and externally, sheltering them nationally and internationally     from     damage

through  appropriate and efficient investigative approaches.

 

We are a well-coordinated team and, as such, conduct customized investigations and secure relevant information and evidence.

Our investigations demonstrate our very own signature. Owing to this and the discrete nature of our work, many of our customer relations have become trusting relationships over three generations.

Only the right path leads to the solution.

On 28 June 1948, DETEKTEI-HOLLER was founded as a one-man business in Bielefeld by Karl Holler.


Karl Holler not only led his detective agency from its humble beginnings to a successful business, he was also one of the first members of today’s Bundesverband Deutscher Detektive e.V.  (federal association of German detectives) and simultaneously served as its president.

Since our establishment, we have been successful in our efforts to protect the entrepreneurial and competitive goals of our clients internally and externally, sheltering them nationally and internationally from damage through  appropriate and efficient investigative approaches.

 

We are a well-coordinated team and, as such, conduct customized investigations and secure relevant information and evidence.