Cristian Simioni

Senior System Administrator

years old
Oslo, Norway

About Me

I'm a Senior System Administrator with over a decade of experience in managing enterprise-grade Linux and Windows environments, automating infrastructure, and supporting mission-critical systems. At Siemens, I help operate and maintain SCADA infrastructure (Spectrum Power 7) across the Nordic region. My focus is on Linux system administration, automation with Ansible, monitoring with Zabbix/Nagios, and database support (Oracle). Previously at Atlassian, I provided technical support for Confluence to some of the world's most recognized companies, including Apple and Disney. That experience sharpened my communication skills and gave me a deep understanding of enterprise collaboration tools and customer success at scale. I'm passionate about technology that enables stability and efficiency, and I thrive in environments that combine technical depth with international collaboration.

Professional Background

Senior System Administrator

Siemens Norway

Mar. 2023 - Current

Design and deploy Spectrum Power 7 SCADA infrastructure across the Nordics, ensuring reliable delivery within quality, schedule, and budget targets.

Administer and support enterprise Linux infrastructure, including installer components, virtualization, networking, and infrastructure delivery.

Implement Ansible automation and Bash scripting to streamline deployments, configuration, and operational workflows.

Monitor system performance with Nagios and Grafana, troubleshoot incidents, and improve service reliability and availability.

Collaborate with product teams, release trains, and stakeholders to improve deployment processes and align technical solutions with operational requirements.

Used skills:

Spectrum Power 7
Linux
Ansible
Troubleshooting
Nagios
KVM
VMWare
Network
Team collaboration

Senior Support Engineer

e-Core / Atlassian

Aug. 2021 - Feb. 2023

Delivered enterprise-level support for Atlassian Confluence and Jira environments used by global clients (Apple, Disney, etc.).

Designed and optimized architectures including SSL, clustering, load balancing (NGINX), and database backends.

Improved knowledge sharing and adoption by automating documentation and governance processes.

Used skills:

Confluence
Jira
Jira Service Desk
Java
Apache
NGINX
Postgres
MySQL
Oracle
Docker
LDAP
AWS

Technical System Administrator Lead

Siemens Brazil

Jan. 2019 - Aug. 2021

Led the design and operation of infrastructure components for Siemens Spectrum Power 7, ensuring high availability and compliance in mission-critical SCADA environments.

Led adoption of automation with Ansible and GitLab CI/CD, streamlining deployments and patch management.

Ensured compliance with corporate security standards, collaborating closely with international release train teams.

Used skills:

Bash
Ansible
Perl
Git
GitLab
Zabbix
Nagios
Docker
CI/CD
Oracle
VMWare
vCenter
Red Hat

Full Stack Developer

Siemens Brazil

Jan. 2014 - Dec. 2018

Developed SCADA software components in C, C++, Java, Perl, Qt, contributing to Spectrum Power 7 system enhancements.

Supported product stability, performance improvements, and custom component development for client projects.

Used skills:

C
C++
Perl
Java
Qt
MySQL

QA Tester (Intern)

Siemens Brazil

Jan. 2013 - Dec. 2013

Execute and automate test books for the Spectrum Power 3 and Spectrum Power 7

Maintain vulnerabilities patches for AIX machines.

Used skills:

AIX
JasperReports
Perl
Microsoft Access

International Experiences

Vienna, Austria

Siemens

Nov. 2018 - Dec. 2018

Supported kickoff of Brazil's first Spectrum Power 7 ADMS project, planning migration from legacy SCADA to Spectrum Power 7..

Medellín, Colombia

Siemens

Jul. 2018 - Aug. 2018

Assisted implementation of Latin America's first Energy Market Management (EMM) system.

Nuremberg, Germany

Siemens

Nov. 2016 - Dec. 2016

Completed training on installation and parametrization of Siemens Power 7 solution.

Minnetonka, United States

Siemens

May. 2016 - Jun. 2016

On-site training for communication modules in Siemens Power 7 solution.

Professional Training

Red Hat OpenShift

Red Hat

2025

Emotional Intelligence

Escola Conquer

2021

Zabbix Foundation

Unirede Treinamentos

2021

VMWare Administration

Pontifical Catholic University of Paraná

2018

GTD – Get Things Done

Call Daniel

2018

BEPiD – Brazilian Educational Program for iOS Development

Apple

2015/2016

Oracle Administration

Softsell

2015

Skills

Infrastructure

KVM
Ansible
Bash
GitLab CI/CD
Git
Docker
VMWare
AWS

Operational Systems

Linux
Windows
AIX

Database

Oracle
MySQL

Monitoring

Nagios
Zabbix
Grafana

Programming Languages

Python
Bash/Shell Script
Perl
C
C++

Others

Spectrum Power 7
vCenter
Red Hat
NGINX
LDAP
Confluence
Jira
ClearCase
Jasper Reports
GIS
Data Mining
Troubleshooting
QtCreator

Education

Master's degree in computing with emphasis in Machine Learning

Pontifical Catholic University of Paraná

2014 - 2016
BSc. in Computer Science

Pontifical Catholic University of Paraná

2010 - 2013

Languages

Papers

Answer Quality Prediction in Q&A forums using Data Mining

MILANI, C. S.; PARAISO, E. C

ENIAC, p. 193-200, 2015
Prepos Environment: A Simple Tool for Discovering Interesting Knowledge

MILANI, C. S.; CARVALHO, D. R

Iberoamerican Journal of Applied Computing, v. 3, p. 41-52, 2013
Post-processing in KDD

MILANI, C. S.; CARVALHO, D. R

Revista de Engenharia e Tecnologia, v. 5, p. 151-162, 2013

Hobbies

Travel
Run
Soccer