Senior System Administrator

• Administration in a hybrid system environment.
• Second and third-level support, incident and change management.
• Use of ticketing system and tools: Jira Cloud, Confluence, MS Teams.
• Exchange 2019/Outlook online support.
• AD/AAD support, creation and assignment of permissions on resources via AD/AAD GPO groups.
• ARP-Guard (NAC) network segmentation.
• Citrix Workspace.
• Distribution software support with Ivanti.
• Veeam backup system in the cloud (AWS).

Further training:

• AZ-801: Configuring Windows Server Hybrid Advanced Services (01.2023–03.2023).
• AZ-040: Automating Administration with PowerShell (01.2023–03.2023).

• Administration of Exchange server/client in an environment with approx. 13,700 mailboxes.
• Technical contact for specialists and managers.
• Handling incidents and service requests using the OTRS ticketing system.
• User support for Outlook 2016 and OWA.
• Analysis and resolution of complex issues.
• Proactive monitoring of the Microsoft Exchange Server environments.
• Adjustment of system configurations based on changes and creation of relevant documentation.
• Use of the email security gateway "NoSpamProxy", spam filters, and email tracking.
• Creation of reputation filters.

• Windows 10 migration.
• Testing peripheral drivers for Windows 10 compatibility, installation and deployment of new drivers.
• Integration of Windows 10 printer drivers on print servers.
• Software distribution with Matrix42 Empirum.
• Creation of checklists for client provisioning.
• Configuration of disk encryption (Trusted Disk) and import of certificates onto smartcards for authentication on new systems.
• Use of ticketing system: Jira.

• Administration and support of Windows Servers 2013/2016 and Active Directory.
• User management with AD user account and email account.
• Exchange server administration 2013/Office 365 and Outlook/OWA 2013/2016.
• Creation of distribution lists as well as shared mailboxes, calendars and resources.
• Error analysis and second- and third-level support.
• Setup of remote access, WLAN certificates and mobile device provisioning.
• Use of OTRS ticketing system as well as Sophos firewall and antivirus.
• Execution of international projects and creation of relevant documentation.
• Installation and configuration of statistical software "Minitab".
• System installation and configuration of fat client and network access via WLAN for login through Citrix Receiver.
• Virtualization: VMware vCenter Server version 6.

• Server administration: Windows 2008 R2, AD, DHCP, DNS.
• Monitoring and administration with Nagios.
• Network management: Cisco Prime.
• Network encryption: PKI, cryptography (crypto boxes).
• Certification authority: Microsoft Enterprise CA.
• Virtual environment: VMware version 5.
• Backup: Symantec, storage virtualization, SAN.
• Switching and routing: VLAN and subnetting with TCP/IPv4.

• Installation and configuration of MS SCOM 2007/R2.
• Setup of RMS & MS based on SQL 2005.
• VMware Center version 5.
• Deployment of SCCM 2007/SP2 management pack on SCOM 2007/R2.
• Creation of management groups and subgroups as well as alerts and notifications.
• Design of management packs with rules and overrides.
• Software distribution and integration into production environments.

• Server administration: Windows 2003, AD, TCP/IP, DNS, DHCP, DFS.
• Virtual environment: VMware vSphere 4.
• Administration of Lotus Notes 6.5 and 7.0.
• Monitoring with Nagios, Dameware and Event Log.
• Patch management: WSUS.
• Antivirus: Symantec Endpoint Protection Manager.
• Data recovery with IBM TSM.
• Use of IBM servers, BladeCenter, Fibre Channel and MS server clusters.

• Administration of heterogeneous networks of Unix servers (AIX).
• Use of Samba as PDC for Windows 2000 systems.
• Server administration and incident management: Windows Server and network.
• Monitoring and data management.
• Creation and integration of network printing systems.
• Use of central management tools like Tivoli Framework.
• Monitoring systems: IBM Tivoli Monitoring.
• Data backup with Tivoli Storage Manager version 5.
• Software distribution with IBM Tivoli Configuration Manager version 4.2.3.

• Support and administration of the client/server environment for Windows XP and MS Office XP.
• Performing security updates.
• Migration and rollout of Windows XP.
• Creation of images and remote software distribution with Empirum.
• Backup and data recovery.
• Troubleshooting.

• System migration from OS/2 to NT4.
• Design and planning of network expansions.
• Resolution of technical inquiries in hardware and software areas.