29.03.2026 aktualisiert

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IT-Consultant / IT-Trainer / IT-Projektleiter

Alsdorf, Deutschland
Weltweit
Alsdorf, Deutschland
Weltweit

Profilanlagen

CV-Aaron-Siller-2026-GER.docx

Skills

Technischer SupportMicrosoft AzureCloud ComputingComplianceInformationssicherheitBeratungMobile Device ManagementWindows-ServerAzure Active DirectoryMicrosoft SharepointAusbildungsaktivitätenVerwaltungstätigkeitenOffice365Microsoft InTuneMicrosoft OnedriveMicrosoft TeamsKpi-Berichterstattung
I am a seasoned Microsoft Cloud Architect and IT consultant with a strong focus on Microsoft 365, Intune, and Azure. Over the years, I have gained extensive experience leading and executing complex projects, solidifying my reputation as a reliable expert in IT infrastructure design, security, and compliance across various industries.
  1. Key Expertise:Microsoft 365 Administration and Migration: I have successfully led numerous migrations to Microsoft 365, including Exchange Online, SharePoint, and hybrid environments. My expertise extends to configuring and optimizing Microsoft 365 services and ensuring seamless transitions for organizations.
  2. Security and Compliance: Ensuring that IT environments meet stringent security and compliance standards has been a core aspect of my career. I have implemented Microsoft Defender solutions and strengthened Microsoft 365 tenants to protect against evolving threats, ensuring GDPR and other data protection compliance.
  3. Mobile Device Management (MDM): With significant experience in Microsoft Intune, I have managed device enrollment, app deployment, compliance policy configuration, and update management. I have developed and executed MDM strategies for organizations with up to 15,000 devices, enhancing mobility without compromising security.
  4. Workshops and Training: As an experienced IT trainer, I have conducted numerous workshops for both end-users and IT administrators. My training repertoire covers Microsoft Teams, SharePoint, OneDrive, Intune, and the entire Microsoft 365 suite, facilitating knowledge transfer and improved user adoption.
  5. Cloud Infrastructure and Project Leadership: I have led projects that involved designing and managing hybrid cloud solutions, overseeing teams, and collaborating with external partners. My work includes integrating complex services like Windows AutoPilot and Azure Active Directory.
  6. Technical Troubleshooting and Support: Proficient in 2nd- and 3rd-level support, I have acted as the primary contact for resolving escalated IT issues, showcasing my problem-solving capabilities in high-pressure situations.

Notable Projects:
  1. IBB Bank Berlin: Implemented comprehensive IT security guidelines and trained internal teams for a hybrid infrastructure supporting 1,000 users.
  2. Xempus AG: Oversaw Microsoft 365 administration, set up Intune MDM, configured Microsoft Defender XDR, and implemented data classification strategies.
  3. Nordzucker AG: Led a team managing Microsoft 365, conducted KPI reviews, supported service integration, and strengthened compliance measures.
  4. Allianz Technology: Managed large-scale Windows Server migrations and cloud consolidation efforts across international teams.
  5. ARD ZDF Beitragsservice: Conducted in-depth tenant reviews and security assessments, presenting findings and recommendations at the executive level.

Sprachen

DeutschMutterspracheEnglischverhandlungssicherPolnischverhandlungssicher

Projekthistorie

Cloud Security Architect / Microsoft 365 Architect

Microsoft Deutschland GmbH

Internet und Informationstechnologie

>10.000 Mitarbeiter

  1. Consulting companies in the Microsoft 365 environment
  2. Customer segments: banking, retail, public sector and government agencies, e-commerce, pharmaceuticals, etc.
  3. Architectural design and configuration of Microsoft Entra ID
  4. Validation and configuration of Microsoft 365 services such as SharePoint Online, OneDrive, Microsoft Teams, and Exchange Online
  5. Implementation and support in establishing governance using Microsoft Purview capabilities
  6. Review of existing policies, configurations, and their impact (both organizational and technical)
  7. Hardening and configuration of Microsoft Defender XDR:
  8. Microsoft Defender for Identity
  9. Microsoft Defender for Office 365
  10. Microsoft Defender for Endpoint
  11. Microsoft Defender for Cloud Apps
  12. Support in the implementation and configuration of Mobile Device Management based on Microsoft Intune
  13. Ensuring data minimization and GDPR-aligned configuration
  14. Creation of reports and presentations, including executive-level (CxO) briefings
  15. Leading a team of up to 10 people

Microsoft Defender XDR Specialist / IT-Security Engineer

N-ERGIE Corporation

Energie, Wasser und Umwelt

5000-10.000 Mitarbeiter

  • Planning, implementation and evaluation of phishing simulations to raise awareness among employees.
  • Implementation of targeted IT security training courses on email security, social engineering and secure working in Microsoft 365.
  • Microsoft Defender XDR management and optimization:
  • Integration of the individual Defender modules (Defender for Endpoint, Defender for Office 365, Defender for Identity, Defender for Cloud Apps) into a unified security dashboard.
  • Configuration and fine-tuning of detection rules, automated investigations, and response actions.
  • Monitor security incidents in the XDR portal and coordinate incident response.
  • Analysis and optimization of threat intelligence feeds.
  • Defender for Cloud Administration includes configuration of Security Alerts, Compliance policies and Cloud App Security Policies.
  • Review and document applicable policies (e.g., retention policies, sensitivity labels, DLP policies) and their impact on affected user groups.
  • Continuously improve security architecture by optimizing policies, automating processes, and implementing new protections.
  • Creation and maintenance of technical documentation for all configurations, changes and processes.

Microsoft Cloud Security Architect

Bilfinger SE

Architektur und Bauwesen

>10.000 Mitarbeiter

  • Development and consulting on the introduction and optimization of the E5 Security & Compliance features, including Data Loss Prevention and Sensitivity Labels.
  • Conception and consulting for the implementation of conditional access, including the replacement of the existing multi-factor authentication solution.
  • Analyze, test, and optimize the existing Intune architecture for mobile, video, and audio conferencing.
  • Support in the introduction of the new app-centric management.
  • Consulting in various M365 projects.
  • Create, implement, and manage M365 tenants in large-scale, automated environments.
  • Plan, develop, and execute comprehensive test scenarios for migration and consolidation tasks.
  • Build and use test environments to ensure system stability and compliance.
  • Close collaboration with project members and coordination within the project, especially with cross-functional teams
  • Creation and maintenance of execution concepts as well as structured, audit-proof documentation.
  • Execution of project-related tasks in accordance with specific requirements and taking into account applicable compliance requirements

Microsoft Architekt / Microsoft 365 Administration und Projektleitung

Xempus AG

Versicherungen

250-500 Mitarbeiter

  • Allgemeine Microsoft 365 Administration (Exchange, SharePoint, Teams, OneDrive, Hybride Landschaft)
  • Administration und Konfiguration Microsoft Defender XDR
  • Aufbau und Administration einer Mobile Device Management mit Microsoft Intune
  • Implementierung Microsoft Information Protection / Datenklassifizierung
  • Incident / Troubleshooting im 2nd-/3rd-Level
  • Härtung Microsoft 365 Tenant
  • Durchführung von Workshops und Schulungen in Deutsch und Englisch
  • Durchführung von Meetings auf CxO-Ebene
  • Virtualisierung mit Hyper-V

Microsoft Security Architekt / Managed Services Integration / Microsoft 365 Projektleitung

IBB Bank Berlin

Banken und Finanzdienstleistungen

500-1000 Mitarbeiter

  • Technische Unterstützung bei der Implementierung einer IT-Security Guideline für die lokale und Cloud-Infrastruktur (~1.000 User), Hybride-Infrastruktur
  • Schulung der IT-Mitarbeiter und Pilotgruppe
  • Administration und Einrichtung der lokalen Server und des Azure Active Directory im Hybriden Umfeld / Beratung Microsoft Teams Umfeld
  • Lizenzberatung im Bereich der Microsoft Enterprise Lizenzierung
  • Beratung zur DSGVO-Konformen Konfiguration
  • Administration der lokalen Windows Server (V.2016, Hyper- V) und Migrationsunterstützung
  • Härtung der Microsoft 365 Umgebung inkl. Exchange

Microsoft 365 Security Architect

ARD ZDF

Internet und Informationstechnologie

1000-5000 Mitarbeiter

  • Recheck and validate the current Microsoft 365 configuration (initial review in 2024)
  • Validation of Microsoft 365 Services: SharePoint Online, OneDrive, Microsoft Teams Customizations and configuration in the Microsoft Defender XDR environment
  • Optimization & Documentation Defender for Office 365 Policies
  • Review the currently applicable policies, settings and their impact on users/user groups
  • Hardening Entra ID (User, Device, App Settings, Conditional Access Policy Validation)
  • Preservation of data-saving and GDPR-compliant configuration
  • Preparation of report and report incl. presentation at CxO level

Microsoft 365 Tenant Review / Security & Compliance Check

ARD ZDF Beitragsservice

Medien und Verlage

1000-5000 Mitarbeiter

  • Prüfung und Validierung der aktuellen Microsoft 365 Konfiguration
  • Validierung der Microsoft 365 Services: SharePoint Online, OneDrive, Microsoft Teams
  • Anpassungen und Konfiguration im Microsoft Defender XDR-Umfeld
  • Optimierung Defender for Office 365-Richtlinien
  • Härtung Entra ID (Benutzer-, Geräte-, App-Einstellungen, Validierung Conditional Access Richtlinien)
  • Wahrung der Datensparsamen und DSGVO-nahen Konfiguration
  • Erstellung Bericht und Report inkl. Präsentation auf CxO-Ebene

Microsoft Architekt

Nordzucker AG

>10.000 Mitarbeiter

  • Leitung des Microsoft 365 Teams (3-4 Personen)
  • Unterstützung bei der technischen Integration und Projektleitung von Microsoft Intune
  • Durchführung von Meetings zur KPI Auswertung (Nutzung der M365 Services, wie Exchange, SharePoint und Teams, Ticketaufkommen und Lösungsrate)
  • Internationales Umfeld (europaweite Standorte)
  • Unterstützung zur Dienstleisterauswahl und Onboarding dessen
  • Härtung der Microsoft 365 Umgebung in einer hybriden Landschaft
  • Einrichtung einer Datenklassifizierung auf Basis der Information Protection

Microsoft Cloud Architekt / Security & Compliance Administration

Allianz Technology

Versicherungen

>10.000 Mitarbeiter

  • Planung und Steuerung der Windows Server Migration (~10.000 User)
  • Konsolidierung von Exchange-, SharePoint und lokalen File-Systemen
  • Weiterentwicklung der hybriden IT-Infrastruktur im Bereich Microsoft 365 und Microsoft Azure
  • Führung von Workshops und Strategie-Meeting mit Standorten in Europa, USA & Asien
  • Arbeiten nach ITIL-Standard
  • Administration der lokalen Windows Server (2012R2 – 2019)
  • Administration im Umfeld von Exchange Online, Benutzer- und Gruppenverwaltung, Security & Compliance Umfeld

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