Otto Haas - Ubuntu Linux System Support

Q: Where is Otto based?

Otto is based in Munich, Germany .

Q: What languages does Otto speak?

Otto speaks the following languages: German (Native) .

Q: How many years of experience does Otto have?

Otto has at least 46 years of experience. During this time, Otto has worked in at least 10 different roles and for 5 different companies . The average length of individual experience is 5 years and 7 months . Note that Otto may not have shared all experience and actually has more experience.

Q: What is Otto's latest experience?

Otto's most recent position is Ubuntu Linux System Support at Self-employed .

Q: What companies has Otto worked for in recent years?

In recent years, Otto has worked for Self-employed .

Q: Which industries is Otto most experienced in?

Otto is most experienced in industries like Information Technology , Tourism , and Education .

Q: Which business areas is Otto most experienced in?

Otto is most experienced in business areas like Information Technology , Project Management , and Research and Development . Otto also has some experience in Operations .

Q: Which industries has Otto worked in recently?

Otto has recently worked in industries like Information Technology .

Q: Which business areas has Otto worked in recently?

Otto has recently worked in business areas like Information Technology and Operations .

Recommended expert

Munich, Germany

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Experience

Mar 2022 - Apr 2023

1 year 2 months

Ubuntu Linux System Support

Self-employed

Linux system support for clients in an enterprise DevOps environment
Bash shell scripting
Git
SaltStack
Foreman
Podman/Docker
Jira
Confluence
Daily Scrum meetings

Jul 2020 - Present

6 years 2 months

Freelance Lecturer

Self-employed

Preparation of participants for the LPIC-1 exam of the Linux Professional Institute
Shell scripting with bash
Imparting practical knowledge on Debian, Ubuntu, Centos, openSUSE

Jul 2019 - Present

7 years 2 months

IT Consultant

Self-employed

Focus on Linux / Unix consulting

Jul 2019 - Jan 2020

7 months

Freelance Consultant

Self-employed

Coordination of patching activities (ESX on HPE and Lenovo x86 hosts with Linux & Windows VMs) for successful PCI-DSS certification
Use of ITIL-based change management tools

Apr 2016 - Mar 2019

3 years

Technical Manager

Amadeus Data Processing GmbH

Work with SuSE Linux Enterprise Server (SLES)
Shell scripting with bash and ksh
Coordination of vulnerability remediation

Aug 1999 - Mar 2016

16 years 8 months

UNIX Systems Manager

Amadeus Data Processing GmbH

Built and led a team of SysAdmins focusing on OS support on AIX with POWER architecture, VIO Server, HMCs and on HP-UX
Increased use of Linux (SuSE Linux Enterprise Server) since 2005 with migration of applications from HP-UX, AIX, MVS to Linux
Participation and coordination of migration projects including architecture, proof of concept, implementation, optimization

Oct 1995 - Jul 1999

3 years 10 months

UNIX System Programmer

Amadeus Data Processing GmbH

System administration of HP-UX and AIX systems
Maintenance of backup solutions based on OmniBack and ADSM/TSM

Oct 1992 - Jul 1995

2 years 10 months

Consultant

CMG GmbH

System administration and automation of UNIX and INFORMIX installations

Jan 1986 - Sep 1992

6 years 9 months

Software Technical Support Analyst

Cray Research GmbH

Installations, upgrades and problem analysis as second level support for UNIX system and network software (UNICOS)
Integration of UNIX mainframes into heterogeneous environments

Dec 1979 - Dec 1985

6 years 1 month

Research Assistant

Technical University of Munich

Scientific collaboration on research projects
Teaching obligations at the Chair for Operating Systems and Computer Networks
Supervision of students in exercises, labs, theses, seminars

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Tourism, and Education.

Information Technology

Tourism

Education

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Project Management, Research and Development, and Operations.

Information Technology

Project Management

Research and Development

Operations

Languages

German

Native

Education

Dec 1979 - Jul 1985

Technical University of Munich

Dr. rer. nat., Computer Science · Computer Science · Munich, Germany

Oct 1973 - Jun 1979

Technical University of Munich

Diploma in Computer Science with minor in Mathematics · Computer Science with minor in Mathematics · Munich, Germany

Certifications & licenses

IHK Munich and Upper Bavaria

Linux Professional Institute

Exin

Statistics

Experience

Total positions 10

Experience in Information Technology 36 y

Avg length 5 y 4 m

Longest experience 16 y 7 m

Expertise

Recent roles Ubuntu Linux System Support, Freelance Lecturer, IT Consultant

Main industries Information Technology, Tourism, Education

Main business areas Information Technology, Project Management, Research and Development

Qualifications

Highest degree Doctorate

Certifications earned 3

Profile

Created

October 2025

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Frequently asked questions

Have questions? Find more information here.

Otto is based in Munich, Germany.

Otto speaks the following languages: German (Native).

Otto has at least 46 years of experience. During this time, Otto has worked in at least 10 different roles and for 5 different companies. The average length of individual experience is 5 years and 7 months. Note that Otto may not have shared all experience and actually has more experience.

Based on recent experience, Otto would be well-suited for roles such as: Ubuntu Linux System Support, Freelance Lecturer, IT Consultant.

Otto's most recent position is Ubuntu Linux System Support at Self-employed.

In recent years, Otto has worked for Self-employed.

Otto is most experienced in industries like Information Technology, Tourism, and Education.

Otto is most experienced in business areas like Information Technology, Project Management, and Research and Development. Otto also has some experience in Operations.

Otto has recently worked in industries like Information Technology.

Otto has recently worked in business areas like Information Technology and Operations.

Otto holds a Doctorate in Computer Science from Technical University of Munich.

Otto has 3 certificates. These include: Trainer Aptitude Regulation, LPIC-1, and ITIL V3 Foundation Training with Exam.

Otto is immediately available for suitable projects.

Otto's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

To hire Otto, click the Meet button on the profile to request a meeting and discuss your project needs.

Salary / Daily Rate Distribution

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<€800 €800-1200 €1600+

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Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

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1000

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Daily rate avg. 861 €

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1000

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Median rate 840 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.