Thomas Krummenacher - Senior ICT System Engineer

Q: Where is Thomas based?

Thomas is based in Baar, Switzerland and can operate in on-site , hybrid , and remote work models.

Q: What languages does Thomas speak?

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

Q: How many years of experience does Thomas have?

Thomas has at least 30 years of experience. During this time, Thomas has worked in at least 8 different roles and for 9 different companies . The average length of individual experience is 3 years and 8 months . Note that Thomas may not have shared all experience and actually has more experience.

Q: What is Thomas's latest experience?

Thomas's most recent position is Senior ICT System Engineer at Abraxas Informatik AG .

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

In recent years, Thomas has worked for Abraxas Informatik AG .

Q: Which industries is Thomas most experienced in?

Thomas is most experienced in industries like Information Technology , Healthcare , and Pharmaceutical . Thomas also has some experience in Manufacturing , Telecommunication , and Automotive .

Q: Which business areas is Thomas most experienced in?

Thomas is most experienced in business areas like Information Technology , Customer Service , and Operations . Thomas also has some experience in Project Management .

Q: Which industries has Thomas worked in recently?

Thomas has recently worked in industries like Information Technology .

Q: Which business areas has Thomas worked in recently?

Thomas has recently worked in business areas like Information Technology , Operations , and Project Management .

Recommended expert

Baar, Switzerland

Check rate

Experience

Dec 2023 - Nov 2025

2 years

Zürich, Switzerland

Hybrid

Senior ICT System Engineer

Abraxas Informatik AG

Administration, engineering & troubleshooting of Microsoft Active Directory and domain controllers, ADFS, DNS, DHCP, GPO, IIS, WSUS, proxy, KMS, RDS, Windows Firewall, Windows file & SQL clustering
Administration and operation of Windows Server 2022/2019/2016/2012
Project planning & execution of the replacement project for Ricoh & Windows print servers across Abraxas Switzerland
Azure administration & engineering
SCCM administration & software distribution
Hyper-V administration & engineering
VMware vSphere 7 administration & engineering
Handling tickets and incidents with ServiceNow
Creating PowerShell scripts for task automation
Windows application server 2022/2019/2016/2012 installation, configuration & troubleshooting
Windows application server migrations (Terris/IIS/print server/MS SQL database servers)
Creating IT documentation in Confluence
IPAM network administration and configuration
Collaborating with network engineers for firewall rules and troubleshooting
Second-level support

Feb 2022 - Oct 2023

1 year 9 months

Zürich, Switzerland

Hybrid

Senior ICT System Engineer

Abraxas Informatik AG

Operation and support of Windows server systems (patching, monitoring, and testing)
Operation and further development of virtualization & MDM platforms (VMware, Hyper-V, Citrix, VDI, MobileIron), including backup & storage
Operation and maintenance of Citrix ADC environments
Server management (AD, file servers, SCCM, print servers, DNS, DHCP, SQL, database operations)
Ensuring release and patch management as well as software deployment
Operation of the central IAM infrastructure, including WAF/WAM
System monitoring and automation as well as lifecycle management
Participation and coordination of projects and execution of change requests
Creating and updating system documentation
Incident, change, and problem management
2nd and 3rd level ticket processing
On-call duty
Vendor management

Jan 2017 - Dec 2020

4 years

IT System Engineer

Hays, Gulp, Randstad

System engineering and administration of Microsoft Windows Server Active Directory, domain controllers, certification authority, ADFS, DNS, DHCP, GPO, PKI
Azure cloud engineering and administration
Windows Server 2016 & 2019 installation & configuration
Active Directory disaster recovery
Office 365 / SharePoint administration
Monitoring of Windows / Linux servers (HP) and network environment with SCOM
Change and release management of supported systems
SCCM (Endpoint Configuration Manager) engineering and administration
Windows Server 2008/2012 application server migration to Windows Server 2016 in Azure Cloud
Domain controller / DNS migration to Windows Server 2016
Microsoft SQL migration 2008 to 2016, Microsoft IIS 7.5-10
Global patch management with WSUS
Exchange administration
VMware engineering & administration
PowerShell scripting
SQL Server installation and administration
Citrix XenApp 7.x administration & configuration
Engineering, monitoring, and operation of Microsoft Windows 7 & 10 clients
Responsible for software distribution with SCCM 2012/2016
Independent coordination and implementation of projects and new requirements
Incident, change, problem, configuration, and release management
2nd & 3rd level support in Windows Server / Active Directory environment
File server reengineering (troubleshooting, file structure handling, VSS implementation, cleaning scripts)
Print server installation & configuration
Support for production environment IT
Creating GPOs
Microsoft Teams / Skype
ServiceNow administration

Jan 2016 - Dec 2016

1 year

System Engineer ICT (Project)

Profilogic AG

Jan 2015 - Dec 2015

1 year

System Engineer ICT (Project)

Sika Informationssysteme AG

Jan 2013 - Dec 2015

3 years

Zürich, Switzerland

Windows Server System Specialist

Sunrise AG

Jan 2011 - Dec 2013

3 years

Zürich, Switzerland

Windows Server Specialist

Emil Frey AG

Jan 2010 - Dec 2011

2 years

Dierikon, Switzerland

Windows Server System Specialist

Migros Luzern

Jan 2006 - Dec 2009

4 years

Neuheim, Switzerland

IC System Specialist

Bucher Hydraulics AG

Jan 2002 - Dec 2006

5 years

Neuheim, Switzerland

IT Analyst

Johnson & Johnson

Jan 1995 - Dec 2002

8 years

Client System Engineer / Client Support

Industry Experience

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

Experienced in Information Technology, Healthcare, Pharmaceutical, Manufacturing, Telecommunication, and Automotive.

Information Technology

Healthcare

Pharmaceutical

Manufacturing

Telecommunication

Automotive

Business Area Experience

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

Experienced in Information Technology, Customer Service, Operations, and Project Management.

Information Technology

Customer Service

Operations

Project Management

Summary

I ensure that your IT infrastructure runs reliably, your business applications are used efficiently and securely by your employees, and new technologies are evaluated, procured, and implemented professionally.

My many years of IT experience with Windows platforms, my IT-specific training, and my skills as a system engineer, administrator, and second-/third-level support specialist help me with that.

I am used to working independently and under pressure at a high-quality level and I like to take initiative on upcoming tasks.

I enjoy interacting with people and can express myself clearly and communicate effectively.

Skills

Extensive Long-term Experience With Windows Domains, Active Directory, And Windows Server Environments (Ad / Dhcp / Dns / Iis / Adfs / Pki / Clustering)
Many Years Of Experience In Virtualization With Vmware And Hyper-v
Successful Execution Of It Projects
Experience With Azure Environment / Microsoft 365
Experience With Linux
Experience With Citrix
Experience With Sql
Patching Servers And Clients With Wsus
Software Distribution With Sccm
Monitoring The It Environment With Scom, Manageengine Opmanager, And Prtg
Planning, Installation & Configuration Of Application Servers
Automating Processes With Powershell Scripts
Windows Server 2008 / 2012 / 2016 / 2019 / 2022 / 2025 5 16 / 12 / 8 / 5 / 3 / 1
Azure Cloud 3 3
Active Directory 5 10
Domain Controllers 5 10
Sharepoint 3 3
Dhcp, Dns 4 8
File Servers 4 8
Iis 4 7
Gpo, Ca, Adfs 4 8
Cluster Servers 4 8
Sql Server 3 8
Exchange Server 3 2
Server Hardware 3 10
Scom 4 8
Sccm 3 3
Frontrange / Enteo Dsm 3 2
Vmware 4 10
Citrix Xenapp / Xenserver 3 4
Hyper-v 4 8
San / Storage Infrastructures 2 3
Backup / Disaster Recovery 3 4
Veeam 3 3
Windows 7 5 10
Windows 10 5 7
Windows 11 5 3
Wsus 5 10
Antivirus (Mcafee, Symantec, Kaspersky, Trend Micro, Microsoft) 5 10
Tcp/ip 4 15
Firewall 3 6
Pki 3 3
Powershell Scripts 3 5
Linux Server 3 3
Technical Writing 4 8
Skype For Business 3 3
Mobile Devices 4 5
Microsoft Teams 4 3
Canon & Ricoh Printer & Software 4 2
Microsoft 365 3 3
Vmware 5 5
Storage 3 3
Networks 3 5

Languages

German

Native

English

Advanced

Education

Oct 1992 - Jun 1995

Landis & Gyr Zug

Commercial apprenticeship · Zug, Switzerland

Oct 1990 - Jun 1992

Loretto

Secondary school · Switzerland

Certifications & licenses

Microsoft Certified System Administrator

Microsoft

Statistics

Experience

Total positions 11

Experience in Information Technology 16.5 y

Avg length 3 y 1 m

Longest experience 7 y 11 m

Global Experience

Countries worked in 1 (Switzerland)

Primary country Switzerland

Expertise

Recent roles Senior ICT System Engineer, IT System Engineer, System Engineer ICT (Project)

Main industries Information Technology, Healthcare, Pharmaceutical

Main business areas Information Technology, Customer Service, Operations

Qualifications

Certifications earned 1

Profile

Created

October 2025

Last Update

April 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Thomas based?

Thomas is based in Baar, Switzerland and can operate in on-site, hybrid, and remote work models.

What languages does Thomas speak?

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

How many years of experience does Thomas have?

Thomas has at least 30 years of experience. During this time, Thomas has worked in at least 8 different roles and for 9 different companies. The average length of individual experience is 3 years and 8 months. Note that Thomas may not have shared all experience and actually has more experience.

What roles would Thomas be best suited for?

Based on recent experience, Thomas would be well-suited for roles such as: Senior ICT System Engineer, IT System Engineer, System Engineer ICT (Project).

What is Thomas's latest experience?

Thomas's most recent position is Senior ICT System Engineer at Abraxas Informatik AG.

What companies has Thomas worked for in recent years?

In recent years, Thomas has worked for Abraxas Informatik AG.

Which industries is Thomas most experienced in?

Thomas is most experienced in industries like Information Technology, Healthcare, and Pharmaceutical. Thomas also has some experience in Manufacturing, Telecommunication, and Automotive.

Which business areas is Thomas most experienced in?

Thomas is most experienced in business areas like Information Technology, Customer Service, and Operations. Thomas also has some experience in Project Management.

Which industries has Thomas worked in recently?

Thomas has recently worked in industries like Information Technology.

Which business areas has Thomas worked in recently?

Thomas has recently worked in business areas like Information Technology, Operations, and Project Management.

What is Thomas's education?

Thomas attended Landis & Gyr Zug.

Does Thomas have any certificates?

Thomas has 1 certificate: Microsoft Certified System Administrator.

What is the availability of Thomas?

Thomas is immediately available full-time for suitable projects.

What is the rate of Thomas?

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