About Me

My name is Sascha Ahlers. I am a system engineer for Windows Server Domains at the BTC IT Services GmbH (Germany). I took some off time to explore China and spend some extra time into my hobby.

Before I also worked at BTC IT Services GmbH for more than 7 years. The first years in the BTC AG before the IT has been outsourced to BTC IT Services GmbH. My main tasks were:

  • Maintenance of complex NAS infrastructures with NetApp filer technology in a large-scale production environment.
  • Installation and configuration of Windows server based on HP hardware.
  • Maintenance of file services and server infrastructures within the scope in accordance with the operation discipline of the IT infrastructure library (incident management / problem management / change management)
  • Maintenance of BlueCoat proxies
  • Automation of technical processes with PHP, PowerShell and Windows command line

Since March 2016 I work again at BTC IT Services GmbH (Germany). The first three mouths I help to build up and migrate one costumer in the gas sector. At 1st June 2016 I started to do my duty in 24 hour rotating shift work for different tasks:

  • Active Directory
  • Apache server
  • Fileservice with NetApp Filer
  • Linux SLES 11.x / 12.x Administration
  • MS Exchange 2013
  • MySQL, MS SQL and Oracle Databases
  • Windows 2008 / 2012 Administration incl. Client Support
  • 4 different applications for the gas sector

My vocational education and the first 6 months I have worked at CvO university of Oldenburg. My vocational education had taken 3 years. Through this time I’ve done a lot of different tasks:

  • Administration of Windows 2000 domains
  • Working with miscellaneous operating systems: Windows 98, NT 4.0, Windows 2000, Windows XP, NT 4.0 Server, Windows 2000/2003 Server and Linux.
  • Working with directory services (Active Directory)
  • Maintenance of the campus-wide anti-virus solution (Sophos Anti Virus)
  • Maintenance and development of the campus-wide software distribution
  • Providing and editing of the dynamic website and web services.
  • Maintenance and consulting of EDP-technical problems for staff and students.
  • Warranty and complaint processing
  • Troubleshooting in networking field (Ethernet networks)


Operating Systems

  • Linux (Debian)
  • OnTap 7.x
  • OnTap 8.0.x
  • Windows NT
  • Windows 2000 / 2003 / 2008 / 2012 / 2016 / 2019
  • Windows XP / 7 / 8 / 10

Programming / Markup Languages

  • Bash
  • CSS
  • Design Pattern
  • HTML
  • MySQL
  • OOA / OOP
  • PHP
  • Powershell
  • XML Schema

Server Maintenance

  • Apache web server (incl. Subversion)
  • Linux server administration (cronjobs, iptables, pureftpd, SSH server, …)
  • MySQL Server
  • Postfix (AmaViS, Courier, dovecot, DKIM, SpamAssassin, SPF)
  • PKI (Certificate Authority)
  • Proxy servers (squid, BlueCoat, Sophos UTM, TrendMicro IWSVA)
  • Storage systems (NetApp)
  • TeamSpeak server
  • Windows Active Directory (GPO, zone concept)
  • Windows server administration (DNS server, DHCP server, FTP server, file server, DFS, print server, …)

Field of Activity

  • 1st-level-support
  • 2nd-level-support
  • 3rd-level-support
  • Change management
  • Critical infrastructure
  • Incident management
  • Problem management
  • Project work
  • On-call service

Working Tools (as a user)

  • Omnitracker
  • Citrix Director
  • Confluence
  • VM vSphere

In case of the on-call service, I also got contacted to many different technologies like VMware ESX server, Citrix server, different Linux operating systems, SAP, MS SQL server, Oracle and much more.


  • German (business fluent)
  • English (fluent)
  • Mandarin (basics)

More About Me

More details about my occupational career you can find over Xing (German network of professional).