Who I am

My name is Thomas Justen. I am an IT Professional, living in Königswinter nearby Bonn, Germany. I am offering IT-Engineering, Architecture and Consulting Services with focus on IT-Security, Virtualization and general infrastructure topics for medium-sized and large enterprises.

Thomas JustenB.Sc. in Business Information Systems

Studies in Business Informatics [University of Applied Sciences Bonn-Rhein-Sieg]

Graduate of the Cisco Networking Academy

IT Specialist specializing in Systems Integration [Siemens Corp.]

CISSP, CEH, CCENT, LPIC-1, MCSA, MCITP, MCSE Server Infrastructure, MSCE Messaging, MCSE Private Cloud, Prince2 Foundation

What I do

Within my role as a technical expert in IT-Infrastructure services, I am providing guidance and support for aligning technical measures with business cases by defining, scaling and implementing solutions.

Key technologies and requirements are often the consolidation of server systems for reducing costs and increasing availability, performance and flexibility by designing and implementing virtualization technologies, as well as reviewing and improving current concepts and implementation in terms IT-security topics.

Microsoft Azure, Office 365, Microsoft Server 2016, Microsoft Server 2019, PowerShell, SCCM, WAP, Always-on VPN, Infrastructure Security, Server and Client Hardening, Proxy Services, Exchange 2016, SQL Reporting Services, Debian Linux, Endian Firewall, Active Directory, Hyper-V, High Availability, VDI, Windows Deployment Services, MDT, Routing and Switching, Host-based Intrusion Prevention, Endpoint Intrusion Detection, Next Level Anti Virus

What I’ve done

11/18 – today | Fraunhofer Society, Sankt Augustin
IT Architect – Identity and Access Management. Review and upgrade of the Active Directory Infrastructure, hardening and implementing best practices with regards to functionalities and IT Security. Managing hybrid SSO and Cloud Infrastructure Systems incl. Azure, AWS and Office 365 Tenants.

07/18 – 11/18 | HRS Group, Cologne
Senior IT Engineer – Server 2016 Migration, Hardening Microsoft Server Infrastructure. Migrating Legacy Microsoft Servers to Microsoft Server 2016. Creating Migration-, GPO Naming and Security Concept.

10/16 – 07/18 | Adient PLC, Burscheid
Senior IT Engineer – End User Computing. Back Level management of a Windows OS environment with about 50.000 Win7, Win8.1 and Win10 devices. Responsible for global Client Management and Patch Management with Microsoft System Center SCCM 2012 and SQL Server Reporting.

09/15 – 10/16 | Johnson Controls International PLC
Senior IT Engineer – End User Computing. Back Level management of a Windows OS environment with about 140.000 Win7, Win8.1 and Win10 devices. Responsible for global Client Management and Patch Management with Microsoft System Center SCCM 2012.

02/15 – 12/15 | Microsoft Germany GmbH, Munich
Architect – Creating and implementing of a remote access concept for a multi-site environment with about 30.000 end user devices based on Microsoft technologies. (Direct Access, Web Application Proxy, IKEv2 VPN, NPS)

05/15 – 11/15 | gkv informatik GbR, Wuppertal
Engineer – Identification of systems, infrastructure services and applications for the migration to a new domain. Coordination of migration processes, responsible for applications, infrastructure components and provision of new server systems. Definition of solution approaches for the provision of special and legacy applications.

02/15 – 05/15 | IT-Verbund Uelzen, Uelzen
Engineer – Objective of the project was the conceptual design, consulting and implementation of a reliable 2-stage PKI infrastructure for the allocation of digital authentication and encryption certificates.

04/13 – 12/13 | Datacenter, Ministry of Finance, NRW, Düsseldorf
Engineer – Creating a security concept and guidelines for Windows 7. Implementing GPOs and supporting the roll-out of Windows 7 on approx. 30,000 client computers according to BSI and Microsoft compliance guidelines.

05/12 – 04/13 | DEVK Insurance Group, Cologne
Engineer – Analysis of requirements regarding the porting of applications from Windows XP to Windows7, definition, analysis and implementation of GPOs, administration of Active Directory and general integrative topics in the field of systems and networks, elaboration of solutions in different project topics related to migration.

11/11 – 04/12 | Microsoft Germany GmbH, Duisburg
Consultant – Analysis, review and elaboration of optimization proposals for a virtualization cluster in order to provide a hosting platform for a Europe-wide custom application. Preparation of an authorization and security concept, implementation and documentation of the configuration.