Arno Onnen
Consultant & Trainer

Evaluation

4.9 from 5 stars

Certified SERVIEW Trainer Arno Onnen

ISO Training Made Fun May 14, 2026

By Sylvia Hochrieser
(Materna)

The instructor was very knowledgeable and was able to demonstrate a good understanding of various frameworks. The material was presented confidently and supported by helpful examples.

Very good training 11/19/2025

From Unknown
(Conet ISB GmbH)

Arno hat das Training optimal geleitet. Durch seine lockere Art hat er die Informationen sehr nahbar weitergegeben und ist auf alle Fragen eingegangen. Das mitgelieferte Workbook hebt die wichtigsten Informationen optimal hervor. Hat Spaß gemacht!

Training materials and tips/advice during the training were excellent! 11/19/2025

From unknown

The online training was good, but it would have been much better in person. The training was very informative and the materials are very well structured for learning. Thank you again!

Well-communicated learning content in a relaxed atmosphere November 19, 2025

By Michael Klüter
(CONET ISB GmbH)

The training was: - lively and personal - enriched with practical experience - good preparation for certification (that's how it seemed, final assessment only possible after the exam :-) ) - interactive, Arno encouraged participation and responded to questions

Great training 11/10/2025

By Christine Mempel
(x1F)

Many thanks to Arno for the entertaining training session despite the dry subject matter. He conveyed the material very well with lots of practical examples.

Excellent trainer August 29, 2025

From Unknown
(Accompio CorpTec)

The active guidance through the training made it easy to understand and absorb the content. The trainer was able to convey the content in a very understandable and, above all, interactive way.

Good training August 29, 2025

By Unknown
(accompio CorpTech)

Competent, amusing training! Nothing to criticize!

Good training August 29, 2025

By Unknown
(accompio CorpTech)

Competent, amusing training! Nothing to criticize!

Very Good July 14, 2025

From unknown

The Trainer made it very easy to understand and not to boring

Very happy with training July 14, 2025

By Ivana Reinegger
(Schwarz IT)

Very good trainer. Highly recommend!

Short, Knowledgeable, and Informative Training July 14, 2025

By HARSH KUMBHANI

Arno was really patient, gave real life example to make us understand the abstract ITIL terms and definitions. I would recommend Arno for ITIL Training

Good examples July 14, 2025

From unknown
(Black IT)

Very good real life examples, calm voice and demeanor, nice pace

Enjoyed the ITIL Foundation Course with Arno July 14, 2025

From unknown
(Black IT)

I liked how the course was structured with examples and questions in every topic. Arno was a very kind and patient trainer who taught the materials well. I enjoyed my 2 days with him and the group!

Short, Knowledgeable, and Informative Training July 14, 2025

By HARSH KUMBHANI

Arno was really patient, gave real life example to make us understand the abstract ITIL terms and definitions. I would recommend Arno for ITIL Training

SERVIEW GmbH

4.8

Based on 450 reviews

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Anja Möllenbeck

11.05.2026

ISTQB Certified Tester Foundation Level Training (online). At first, I thought the instructor was a bit over the top in terms of energy level. Over the course of the three training days, however, this turned out to be just right because it helped us get through some of the more tedious material. The training and the materials were well-structured and easy to understand. The materials prepare you well for the exam. The process of registering for the exam through Pearson VUE was also clearly explained to us, so that after completing the training, you can confidently proceed with registration and exam preparation. I would book a training course here again anytime.

Giovanni Presti

10.06.2026

I completed the preparatory course at Serview the week before last and was very satisfied overall. The instructors were very laid-back and created a pleasant learning atmosphere. The material was presented clearly, and there were plenty of opportunities to ask questions. I participated remotely, and everything worked flawlessly from a technical standpoint—both the video quality and the audio were consistently very good. At the same time, I can easily imagine that attending in person (e.g., if you’re near Frankfurt) would also be worthwhile. I particularly appreciated the varied structure of the classes, which included many group exercises. The provided materials were comprehensive and supportive of the learning process. Overall, this is a highly recommended course that prepares you well for the exam.

Norbert Kutscher

11.04.2026

Combining the Scrum Master and Product Owner roles into a single course was a smart decision. Both perspectives complement each other—those who understand both roles work together much more effectively in practice. The training materials are well-structured, clear, and directly tailored to the exam requirements. The practice exams helped me recognize typical patterns of thinking in the exam: “What does the Scrum Guide say—not what do I do in practice?” This shift in mindset is the real learning outcome. I’d especially like to highlight Nancy as the facilitator: She explained complex concepts precisely and with real-world relevance, answered questions competently at all times, and created an atmosphere where participants felt comfortable asking for clarification. Her style is direct, engaging, and technically on point—exactly what you need in an exam preparation course. I highly recommend this course to anyone looking for a direct path to PSM I and PSPO I.

Constantin Kaping

23.01.2026

Very structured training! Good mix of content, breaks, and interaction. Content was repeated regularly so that it sticks in your memory. No question was left unanswered. Highly recommended!

All Reviews

Arno Onnen
Consultant & Trainer

Evaluation

Do you have any questions about our services or would you like a quote?

Germany: +49 (0) 6172 1774460 (Daily 07.00 - 22.00)
Austria: +43 1 20511601005
Switzerland: +41 43 210 96 27
United Kingdom: +44 (0) 20 45770700 (Daily 07.00 - 22.00)
United States: +1 (646) 537 7672

e-mail contact form WhatsApp Consultation

Find your training here

Arno Onnen Consultant & Trainer

Evaluation

Do you have any questions about our services or would you like a quote?

Germany: +49 (0) 6172 1774460 (Daily 07.00 - 22.00) Austria: +43 1 20511601005 Switzerland: +41 43 210 96 27 United Kingdom: +44 (0) 20 45770700 (Daily 07.00 - 22.00) United States: +1 (646) 537 7672

e-mail contact form WhatsApp Consultation

Find your training here

Arno Onnen
Consultant & Trainer

Germany: +49 (0) 6172 1774460 (Daily 07.00 - 22.00)
Austria: +43 1 20511601005
Switzerland: +41 43 210 96 27
United Kingdom: +44 (0) 20 45770700 (Daily 07.00 - 22.00)
United States: +1 (646) 537 7672