Markus D. - Senior System Engineer (Server)

Birmensdorf, Switzerland

Experience

Feb 2024 - Jun 2024

5 months

Senior System Engineer (Server)

EMS Chemie

Operating and enhancing the global server and virtualization infrastructure
Operating and maintaining storage systems used worldwide
Managing global Active Directory services
Providing 2nd and 3rd level support in the mentioned areas
Independently overseeing and leading small IT projects

Apr 2023 - Oct 2023

7 months

Solution Architect

Oberfinanzdirektion Karlsruhe

Conducting as-is and to-be analysis
Gathering requirements for the new platform
Analyzing forensic software FTK, X-Ways, Hansken, and Nuix
Coordinating with the business department
Creating a high-level design
Collecting requirements for the forensic software Nuix and Hansken

Oct 2020 - Feb 2022

1 year 5 months

Lead Senior System Engineer

Falcon Privatebank AG

Managing 200 Windows servers
Optimizing the Argent monitoring solution
Setting up WSUS patching
Operating an Exchange 2016 cluster and a SQL cluster
Administering PKI
Migrating an MS SQL cluster
Operating a Citrix farm
Creating data analysis PowerShell scripts
Managing the NDES-Intune installation
Administering NetApp filers
Operating a VMware ESX cluster
Leading the email export project (EnterpriseVault export with Transvault, O36 migration with CodeTwo)
Leading a data migration project

Nov 2019 - Aug 2020

10 months

Citrix / Infrastructure Architect

ZKW Group

Leading the Citrix farm project in China
Redesigning the entire global Citrix infrastructure
Setting up Citrix Cloud with internal NetScalers and RSA two-factor authentication
Performing VMware/Citrix performance tuning
Developing a high-level concept for the new network infrastructure
Advising on the network setup for the new logistics center based on the new concept
Presenting to management

Jan 2018 - Nov 2019

1 year 11 months

Continuous Improvement Manager Base & Application Integration Engineering

Swisscom (Schweiz) AG

Improving work in the connected workplace
Providing external access with NetScaler and multi-factor authentication
Optimizing the entire virtualization environment for over 20 clients
Leading the performance task force
Performing VMware/Citrix performance tuning
Planning resources
Handling escalations
Conducting technical interviews and selecting candidates

Jan 2018 - Jan 2018

1 month

Ratingen, Germany

Consultant

DKV Mobility Services Business Center GmbH & Co. KG

Correct file server permissions with PowerShell scripts
Find and delete empty Active Directory groups with PowerShell
Find and fix NTFS permissions with PowerShell (creating missing groups in subdomains)

Dec 2017 - Dec 2017

1 month

Angermünde, Germany

Consultant

Papierfabrik Louisenthal GmbH

Migration of Active Directory domain controllers from Windows Server 2012 to Windows Server 2016
Migration of DHCP Server from Windows Server 2012 to Windows Server 2016
Migration of DFS file servers from Windows Server 2012 to Windows Server 2016
Installation of Active Directory Certificate Services (PKI) on Windows Server 2016
Migration of Citrix XenDesktop 7.9 to Citrix XenDesktop 7.15 LTSR
Migration of Citrix XenApp 6.5 to Citrix XenApp 7.15 LTSR
Configuration of NetScaler load balancer
Migration of XenServer 7 to VMware ESX 6.5

Oct 2017 - Oct 2017

1 month

Bussnang, Switzerland

Solution Architect

Stadler Rail

Creation of a detailed design for centralizing and renewing the Citrix XenApp/XenDesktop farm based on XenDesktop 7.17 LTSR
Setup of a farm with multiple sites across four locations
Deployment using PVS and MCS and implementation of persistent desktops for GPU usage
Access via GSLB/Access Gateway with GeoIP and user group mapping

Mar 2017 - Sep 2017

7 months

Boxtel, Netherlands

Infrastructure Team Lead

VionFood Group

Leading an infrastructure team with 24 team members across 12 sub-teams (network, Citrix, backup, etc.)
Responsible for budget, staff, and project management
Improving the quality of delivered work
Holding regular meetings and informing the Supply Chain Manager
Designing and implementing a dedicated Workplace AD with Windows 10 and Office 365 including Hosted Exchange, SharePoint, OneDrive, Delve, and Skype for Business
Implementing ADFS for external authentication with a web proxy in the DMZ and ADFS servers in the LAN
Setting up a problem management structure for faster incident resolution and prevention
Adding Microsoft Identity Management (MIM/IAM) for building the new Workplace domain

Jul 2016 - Jul 2016

1 month

Mönchengladbach, Germany

Consultant

Küchenhaus Jansen

Migration of Microsoft Exchange Server 2010 to Office 365
Upgrading local MS Office 2010/2013 installations to Office 2016

Sep 2012 - Dec 2012

4 months

Vienna, Austria

Architect

Kapsch Group

Design of the new Citrix infrastructure with XenApp 6.5 and Provisioning Services
Planning external access for iPhones and iPads via NetScaler with Access Gateway Enterprise (AGEE)

Jun 2012 - Dec 2012

7 months

Leverkusen, Germany

Architect

Lanxess

Reviewing the design of the new Citrix XenApp 6.5 and Provisioning Services environment in EMEA and AP
Proposing necessary changes
Creating the concept for remote access via Access Gateway Enterprise (AGEE) for AP

Jan 2011 - Jun 2016

5 years 6 months

Zürich, Switzerland

Global Data Center Architect

Scor International LTD

Concept and design of the new global data center for a central Citrix environment
Designing zoning and worker groups for worldwide application delivery
Using Citrix XenApp 5, XenApp 6.5, Provisioning Server 5.6, and NetScaler
Virtualizing 143 XenApp servers on VMware in two data centers
Implementing the concept as an engineer
Using LanDesk Management Suite from version 9 to deploy XenApp servers including applications
Packaging software for unattended installations of Citrix servers and applications with LanDesk
Scripting with PowerShell, VBScript, and batch
Creating concepts and documentation
Tuning, performance optimization, and capacity planning
Managing file migrations between two domains
Implementing Nagios monitoring for the Citrix infrastructure
Daily operational tasks
Concept and design of the upgrade to XenApp/XenDesktop 7.x, including a new remote access solution with NetScaler Access Gateway Enterprise and SafeNet two-factor authentication, as well as StoreFront 3.x
Technical project lead/architecture for two-factor authentication on Windows workstations, including PoCs with DUOsecurity, RSA, SafeNet SAS Cloud, DualShield with RSA over a SAML connection to the ADFS server as IdP
Role-based access management with Forefront Identity Manager (FIM/IAM)
Technical lead for implementing/updating Korvas software from 4.4 to 4.5 64-bit and from 4.5 to 4.6 on XenApp 6.5

Sep 2010 - Dec 2010

4 months

Darmstadt, Germany

XenDesktop VDI Architect

T-Systems AG

Designing and deploying 5000 XenDesktop VDIs on VMware ESX
Administration of Citrix Provisioning Service and XenDesktop DDC
Creating VMs via vCLI PowerShell script
Profile management with AppSense EM v8
Software distribution using Matrix24

Mar 2010 - May 2017

7 years 3 months

Venlo, Netherlands

Active Directory & Infrastructure Architect

Pearl Optics

Building and maintaining the local Active Directory
Administration of Windows and Linux workstations
Migrating Exchange 2010 to Office 365 with external authentication via ADFS without password sync
Implementing SharePoint, OneDrive, and Delve
Upgrading Windows Server 2008 to Windows Server 2012 R2
Managing site-to-site VPN connections
Remote work by arrangement

Summary

Project management team leadership
Windows Server
Windows Server 2012
Windows Server 2016
Windows Server 2008
Office 365
Active Directory Group Policy (GPO)
Windows 7
ADFS
Migration rollout
Citrix XenApp 6.5 – 7.x
Citrix XenDesktop 4 – 7.x
Citrix NetScaler 8 – 11
Citrix XenMobile 8 – 10
Virtualization
PowerShell
Citrix ShareFile
Windows 10
Microsoft SQL
VBScript
LAN / WAN
Firewall
Authentication / Authorization

Because of my passion and many years of experience in IT, both as a hobby and at work, I work quickly and am very versatile. I easily adapt to any new work environment and can learn new things fast. I am a good team player and a supportive colleague. I am also strong in my own work. I am helpful and always try to find the best solution for every problem. To me, a problem is a challenge and I solve it quickly thanks to my analytical skills.