Freelancer profile translated to English.
Back to original languageAbout Adrian
I am an IT architect and network & system engineer with a focus on enterprise networks, security, virtualization, and cloud infrastructure. My experience ranges from classic network technology (routing, switching, firewalls, VPNs) to SD-WAN and BGP environments, as well as virtualization with Proxmox, ESXi, and Linux systems. Additionally, I work with cloud infrastructure and Microsoft environments, guiding projects from design to stable operation.
As a system engineer, I understand infrastructure "from the box to the cloud" – from physical hardware and operating systems to network services (DNS, DHCP, firewalls) and modern architectures with automation and monitoring. I develop scalable, secure, and maintainable environments and support companies in optimizing, migrating, and stabilizing their IT infrastructure.
My strengths are technical depth, clear structures, and the ability to explain complex know-how understandably – both for technical teams and non-technical decision-makers. I enjoy working remotely, on a project basis, or long-term, and in every project, I consider how the solution can be maintained and expanded in the long run.
German
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- AnonymIT Team LeadMarch 2023 - October 2025 (2 years and 7 months)Hamburg, Germany- Leading, developing, and coordinating the IT team, including personnel responsibility and resource planning- Further developing IT infrastructure and ensuring a highly available private cloud system landscape- Planning and managing IT projects in the areas of infrastructure, cloud, and security- Administration and maintenance of Entra ID (formerly Azure) and Microsoft 365 online tenants- Provisioning, configuring, and maintaining Windows servers- Managing Active Directory domains, user accounts, and group policies. Monitoring system performance and ensuring availability- Optimizing and automating IT processes for increased efficiency- Designing, implementing, and monitoring backup strategies with VEEAM- Setting up, managing, and securing network components such as firewalls and switches with products from Sophos XGS, Fortinet, as well as switches from CISCO, HPE / Aruba.- Designing, implementing, and administering SSL / IPSEC VPN connections- Designing and implementing infrastructure projects- Installing and configuring central network services (DNS, DHCP, IIS)- Capacity planning and performance optimization for existing IT systems- Analyzing and resolving infrastructure problems as well as providing technical support to users- Conducting infrastructure analyses and optimizing existing systems- Planning, implementing, and managing a colocation cloud environment based on VMware, Cisco, and a Sophos XGS firewall cluster- Implementing and administering the ticketing system Kaseya BMS and Autotask- Setting up, managing, and further developing the RMM solution Ninja- Coordinating and collaborating with other departments to optimally support IT requirements- Documenting and standardizing IT processes for efficient knowledge management (Confluence, Autotask)- Contact person for audits and compliance issues in IT security- Onboarding new customers from kickoff to contract closing
- AnonymIT AdministratorSeptember 2022 - March 2023 (6 months)Hamburg, Germany- Administration of Windows domains (2012–2022)- Management and support of Microsoft 365- Migration of a terminal server farm- Migration of a file server (2012 → 2022) including DFS- Conversion and administration of a print server- Planning, installation, and management of an IT infrastructure with Windows Server 2022, Hyper-V, Sophos XG, Exchange, and terminal servers
- AnonymIT AdministratorSeptember 2021 - August 2022 (11 months)Hamburg, Germany- Management of an IT environment with 1,000–1,500 users- Administration of Microsoft 365- Management and migration of Windows domains (2008–2022)- Exchange migration (2016 → 2016/2019)- Migration of a file server (2008 → 2022) including DFS
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Education
- IT Specialist for System Integration2021Fachinformatiker für Systemintegration
- Chamber of Industry and Commerce Certificate of Achievement Grade: 2 Intermediate School Leaving Certificate (MSA) Vocational SchoolIHK- Abschlusszeugnis Note: 2 Mittlere Reife (MSA) Berufsschule