Ronald Mazelisz - DevOps Consultant

Q: Where is Ronald based?

Ronald is based in Munich, Germany .

Q: What languages does Ronald speak?

Ronald speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Ronald have?

Ronald has at least 16 years of experience. During this time, Ronald has worked in at least 7 different roles and for 1 company . The average length of individual experience is 2 years and 8 months . Note that Ronald may not have shared all experience and actually has more experience.

Q: What is Ronald's latest experience?

Ronald's most recent position is DevOps Consultant at M.it services & systems GmbH .

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

In recent years, Ronald has worked for M.it services & systems GmbH .

Q: Which industries is Ronald most experienced in?

Ronald is most experienced in industries like Information Technology and Retail .

Q: Which business areas is Ronald most experienced in?

Ronald is most experienced in business areas like Information Technology , Operations , and Quality Assurance . Ronald also has some experience in Business Intelligence .

Q: Which industries has Ronald worked in recently?

Ronald has recently worked in industries like Information Technology .

Q: Which business areas has Ronald worked in recently?

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

Recommended expert

Munich, Germany

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Experience

Sep 2023 - Jan 2025

1 year 5 months

DevOps Consultant

M.it services & systems GmbH

Adjusting, optimizing, configuring, and administering a multi-stage GitLab instance with over 250 users
Building, adjusting, expanding, and optimizing infrastructure, configuration, and monitoring
Providing services and handing them over to production
System environment: DependencyTrack, GitLab, Grafana, Hedgedoc, Kubernetes, OAuth2 Proxy, Openstack, Prometheus, Syseleven

Oct 2022 - Sep 2023

1 year

DevOps Operator

M.it services & systems GmbH

Deploying new software components as part of the 'OSCI Registration Office Integration' project
Adopting and implementing the new components in Openshift
Adjusting configurations and infrastructure
System environment: ArgoCD, HashiCorp Vault, Helm, GitLab, Kafka, Keycloak, Openshift, OSCI Product+Gateway, Harvester, Triggerexporter

Jul 2022 - Present

4 years 1 month

DevOps Consultant

M.it services & systems GmbH

Development and operation of WebRTC streaming service components (sender, SFU, stream, room, user)
Providing GitLab CI/CD pipelines
Infrastructure and deployment of backend services
Building and code signing Windows applications via pipeline
System environment: Docker, Gcore, GitLab, Grafana, Hetzner, Janus, Keycloak, Kong, Livekit, Nginx, OBS, PostgreSQL, Prometheus, Redis, Supabase, Terraform, Turn, WebRTC

May 2021 - Oct 2022

1 year 6 months

Berlin, Germany

Site Reliability Engineer

M.it services & systems GmbH

Extending and optimizing CI/CD pipelines and monitoring
Operating backend systems for mobile applications
eGovernment development project, creating concepts and establishing processes
System environment: GitLab, Grafana, Helm, Java, Openshift

Jul 2019 - May 2020

11 months

Munich, Germany

Change Coordinator, DevOps Engineer

M.it services & systems GmbH

Change and incident management according to ITIL: coordinating, planning, preparation, creation, quality assurance, and coordination of changes
Vendor management and quality control
Error analysis and troubleshooting, performing manual tests, maintaining manuals
System environment: GitLab, GlassFish, Java, Remedy, Suse Linux

Mar 2019 - Dec 2019

10 months

Munich, Germany

E-Commerce Analyst

M.it services & systems GmbH

Mapping and advising on business processes in the online shop
Supporting the handling of day-to-day operations
Evaluating and implementing interface and process optimizations
Designing, creating, and documenting ETL jobs using bash scripts and Talend Studio
System environment: Docker, Linux, MySQL, MSSQL, Talend Studio

Jul 2018 - Dec 2018

6 months

Ismaning, Germany

System Administrator, Online Shop Analyst

M.it services & systems GmbH

Analyzing incidents on an international e-commerce platform
Performing deployments, patches, and upgrades
Log file analysis and solution development
Administering Confluence and Jira
System environment: Confluence, Docker, FACT-Finder, FirstSpirit, Jira, Nginx, Red Hat Linux, Tomcat

Nov 2017 - Jun 2018

8 months

Munich, Germany

E-Commerce Analyst

M.it services & systems GmbH

Data analysis and solution development
Planning and creating changes
Working with e-commerce platform: IBM WebSphere Commerce and custom software solutions

May 2015 - Dec 2018

3 years 8 months

Munich, Germany

Change Coordinator, DevOps Engineer

M.it services & systems GmbH

Build and release management
Change and incident management according to ITIL
Creating, managing, and optimizing jobs in the Jenkins CI/CD pipeline
Server administration and configuration of external interfaces
Quality gate for changes and releases
Planning, preparing, creating, quality assuring, and conducting deployments as microservice containers and on application servers
Managing service providers and quality control, error analysis and resolution
Executing and analyzing tests, maintaining manuals
System environment: Ant, bash, CI/CD, GlassFish, Java, Jenkins, Lineman, Maven, Nagios, Nexus, OpenShift, Remedy, SVN, Suse Linux, Windows Server

Sep 2001 - Feb 2008

6 years 6 months

Support and System Administrator

M.it services & systems GmbH

Configuring servers, Active Directory, backups, GPOs, shares, VPN
Deploying and configuring clients, users, and printers
Deploying applications using software distribution systems

Industry Experience

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

Experienced in Information Technology and Retail.

Information Technology

Retail

Business Area Experience

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

Experienced in Information Technology, Operations, Quality Assurance, and Business Intelligence.

Information Technology

Operations

Quality Assurance

Business Intelligence

Summary

I have extensive experience in managing and optimizing infrastructures, focusing on effective configuration, continuous integration/deployment pipelines, and robust monitoring solutions. My skills span automated deployments, container orchestration, and system administration, which I have applied in dynamic environments using technologies like GitLab, Kubernetes, Docker, Openshift, and various CI/CD tools.

My approach is hands-on, blending deep technical knowledge with process optimization in multi-stage setups and high-demand systems. I am committed to elevating system performance and ensuring smooth operations while continuously refining and scaling environments with efficiency and reliability.

Skills

Planning, Developing, Building, And Optimizing Ci/Cd Pipelines
Service Delivery And Operation Of Development And Test Systems, Handover To Production
Coordination, Planning, Preparation, And Execution Of Changes, Deployments, And Releases
Error Analysis And Troubleshooting, Build, Change, Incident, And Release Management
Many Years Of Experience In Linux And Windows System Administration
Aws 6 Months+
Azure 6 Months+
Hetzner 3 Years
Gcore 1 Year
Openshift 3.5 Years
Openstack 1.5 Years

Languages

German

Native

English

Advanced

Education

Company / Vocational School

Vocational qualification · IT Specialist in System Integration · 2

Certifications & licenses

ITIL

Statistics

Experience

Total positions 10

Experience in Information Technology 16.5 y

Avg length 2 y

Longest experience 6 y 5 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles DevOps Consultant, DevOps Operator, Site Reliability Engineer

Main industries Information Technology, Retail

Main business areas Information Technology, Operations, Quality Assurance

Qualifications

Certifications earned 1

Profile

Created

June 2026

Last Update

June 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Ronald based?

Ronald is based in Munich, Germany.

What languages does Ronald speak?

Ronald speaks the following languages: German (Native), English (Advanced).

How many years of experience does Ronald have?

Ronald has at least 16 years of experience. During this time, Ronald has worked in at least 7 different roles and for 1 company. The average length of individual experience is 2 years and 8 months. Note that Ronald may not have shared all experience and actually has more experience.

What roles would Ronald be best suited for?

Based on recent experience, Ronald would be well-suited for roles such as: DevOps Consultant, DevOps Operator, Site Reliability Engineer.

What is Ronald's latest experience?

Ronald's most recent position is DevOps Consultant at M.it services & systems GmbH.

What companies has Ronald worked for in recent years?

In recent years, Ronald has worked for M.it services & systems GmbH.

Which industries is Ronald most experienced in?

Ronald is most experienced in industries like Information Technology and Retail.

Which business areas is Ronald most experienced in?

Ronald is most experienced in business areas like Information Technology, Operations, and Quality Assurance. Ronald also has some experience in Business Intelligence.

Which industries has Ronald worked in recently?

Ronald has recently worked in industries like Information Technology.

Which business areas has Ronald worked in recently?

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

What is Ronald's education?

Ronald attended Company / Vocational School for IT Specialist in System Integration.

Does Ronald have any certificates?

Ronald has 1 certificate: ITIL.

What is the availability of Ronald?

Ronald is immediately available full-time for suitable projects.

What is the rate of Ronald?

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