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The Ondefo Company is centrally located in Germany, Skandinavia and Austria.

The Ondefo Company was originally founded in 2005 by Jan Porthun in Germany as the Ondefo Publishing House and was active in Skandinavia and later also in Austria since 2012.

In Germany, the Ondefo Company is located in Potsdam near Berlin. With a population of 3.5 million people, Berlin is Germany's largest city.

In Scandinavia, we are located in Reinsvoll, not far away from Oslo.
Oslo is the economic and governmental center of Norway.

In Austria, we are located in Graz.
Graz is nearby Vienna and is the second-largest city in Austria after Vienna and the capital of the federal state of Styria.

Ass. Prof. Jan Porthun MMMSc is founder of the Ondefo Company and your competent contact person.

Jan Porthun


Ass. Prof. on The Norwegian University of Science and Technology (NTNU) in Norway (Website: NTNU)

Teaching of students of the Danube University of Krems (Austria)

His scientific main focus is:

Anatomy, physiology, biomechanics, pathology and medical biometry/ medical statistics.

He is member of the International Society for Clinical Biostatistics (ISCB), the International Biometric Society (IBS), the International Society for Clinical Biostatistics (ISCB) and the Society for Clinical Trials (SCT).

He has published multiple books of medical content, for example the Medical Dictionary norwegian-german / german-norwegian.

Karl-Liebknecht-Str. 36
14482 Potsdam
Tel.: +493854862300
Sagvegen 1
2840 Reinsvoll
Tel.: +4795007916
Villefortgasse 13
8042 Graz
Tel.: +4369913254351
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