Systems & Infrastructure
Windows Server, Active Directory, virtualization and core infrastructure services as a resilient foundation for IT operations.
Enterprise IT · Infrastructure · Endpoints
Pascal Achenbach
IT Systems Administrator | Endpoint Engineer
I combine traditional systems administration with modern endpoint engineering to deliver stable Windows and virtualization platforms, standardized client lifecycle processes, and enterprise operations that remain transparent, secure and scalable.
My focus is production-oriented infrastructure, Windows Server & Active Directory, VMware/Proxmox virtualization, and centrally managed endpoints with Microsoft 365, Intune and Entra ID.
Windows Server & Active DirectoryVMware & ProxmoxMicrosoft Intune & Entra IDEnterprise OperationsEndpoint Lifecycle
Professional Profile
Enterprise IT with an operations mindset.
My profile brings together two disciplines that are closely connected in modern enterprise environments: reliable operation of core IT infrastructure and standardized management of endpoints.
I evaluate technical decisions not only by functionality, but also by operational risk, maintainability, supportability, security and how effectively a solution can be governed throughout its lifecycle.
Endpoint Engineering
Standardized Windows endpoints, deployments, lifecycle processes and centralized management with Intune, PXE and imaging.
Identity & Modern Workplace
Microsoft 365, Entra ID, Exchange Online and device/user administration built around consistent operating models.
Operational Reliability
Structured troubleshooting, controlled change, security baselines and traceable documentation for production enterprise environments.
ENTERPRISE DELIVERY
Technical depth with a focus on production operations
Experience across financial services, healthcare and infrastructure consulting has reinforced one principle: infrastructure has to work under real operating conditions. That requires clean handovers, reproducible configurations, controlled migrations, fast troubleshooting and standards that other teams can understand and operate.
~1.450Workstations & notebooks in a large-scale rollout
~1.800Managed clients in an enterprise environment
L2 / L3Support in production-critical infrastructure
Technical Expertise
Technical Expertise
My technical focus covers the complete path from datacenter to workplace: servers, virtualization, identity, endpoint lifecycle, security components and operational support processes.
The emphasis is not on product knowledge in isolation, but on combining platform operations, standardization and reliable implementation in an enterprise context.
Microsoft 365 & Modern Workplace
Administration and continuous improvement of modern Microsoft environments with a focus on identities, endpoints and standardized operational processes.
- Microsoft 365 and Exchange Online
- Microsoft Intune for managed endpoints
- Microsoft Entra ID and identity lifecycle
- Shared mailboxes and user administration
Virtualization & Datacenter
Administration, migration and continuous improvement of virtualized platforms for stable server and deployment workloads.
- VMware vSphere 6.7 U3 / 7 / 8
- Proxmox VE 8 / 9
- Microsoft Hyper-V
- Citrix Hypervisor 8.2 LTSR
Windows Server & Active Directory
Extensive experience with Windows Server infrastructure, directory services and core enterprise services.
- Windows Server 2012 to 2025
- Active Directory administration
- Server migrations and platform transitions
- Exchange Server 2016 / SQL Server 2016
Endpoint Lifecycle & Deployment
Standardized provisioning and lifecycle management of Windows endpoints — from imaging to centralized management.
- Windows 11 rollouts and migrations
- PXE-based deployment processes
- Dell ImageAssist
- Client lifecycle and standardized rollouts
Security & Network Infrastructure
Operation and administration of security-relevant infrastructure components backed by strong fundamentals in networking and security technologies.
- FortiGate Next-Generation Firewalls
- Sophos XGS
- Cisco Security Appliances
- LAN/WAN and IT Asset Management
IT Operations & Support
Structured operations in demanding enterprise environments with clear prioritization by business impact and availability.
- L2 / L3 Enterprise Support
- VIP support for management and executives
- IT Change Management
- Time-critical front-office support
Enterprise Capability Architecture
From core systems to managed endpoints.
Reliable operations require servers, identities, endpoints and operational processes to be treated as one connected architecture.
This model shows how my technical focus areas connect within an enterprise operating model.
PLATFORM FOUNDATIONCONTROL & IDENTITYENDPOINT LIFECYCLEOPERATIONS
01
Core Infrastructure
Windows Server, Active Directory and virtualization form the technical foundation for production services.
02
Identity & Control Plane
Microsoft 365, Entra ID, Exchange Online and Intune connect users, devices and centralized policies.
03
Managed Endpoints
Standardized Windows clients are provisioned and operated through defined deployment and lifecycle processes.
04
Operational Governance
Change management, documentation, support and security ensure that technical standards remain effective in day-to-day operations.
Operational Reliability
Stability · Standardization · Supportability · Security · Traceable lifecycle
Stable Operations
Clear technical baselines and reproducible configurations reduce unnecessary variation and support faster troubleshooting.
Standardized Endpoints
Defined images, policies and deployment processes improve consistency, maintainability and scalability across larger endpoint estates.
Controlled Change
Piloting, documented dependencies and rollback options help implement changes with lower operational risk.
Enterprise Supportability
Documentation, clear ownership and traceable standards improve handovers, support and long-term platform operations.
Enterprise Operating Model
Systems and endpoints managed as one controlled operating model.
Enterprise IT becomes reliable when platforms, identities, endpoints and changes are not treated in isolation.
My approach connects systems administration and endpoint engineering through clear technical standards, measurable operational goals and transparent lifecycle processes.
IT SYSTEMS ADMINISTRATION
Core Infrastructure
- Windows Server & Active Directory
- VMware vSphere · Proxmox · Hyper-V
- Server migrations & platform operations
- Network & security dependencies
ENTERPRISE OPERATIONS
Stable · Standardized · Secure
Change ControlDocumentationMonitoringLifecycle
ENDPOINT ENGINEERING
Managed Endpoints
- Windows 11 & Client Lifecycle
- Microsoft Intune & Entra ID
- PXE · Imaging · Dell ImageAssist
- Policies, compliance & rollout standards
01 · ASSESSCreate visibility
Capture the current state, technical dependencies, policy conflicts, known failure patterns and operational risks in a structured way. Prioritization is based on business impact, stability and security.
02 · STABILIZEStabilize operations
Bring critical services and endpoints onto dependable baselines. The goal is a reproducible state in which issues can be isolated and changes assessed in a controlled manner.
03 · STANDARDIZEEstablish standards
Standardize configurations, images, policies, roles and operating procedures. Fewer variants mean fewer failure points, faster support processes and better maintainability.
04 · CONTROLRoll out changes safely
Use pilot groups, defined change windows, transparent documentation and fallback options instead of uncontrolled global changes.
05 · SCALEManage lifecycle and scale
Evolve platforms and endpoints so migrations, growth and new requirements can be supported in a controlled way while operations, security and maintainability remain part of every technical decision.
Pilots, defined change windows and fallback options reduce operational risk and improve traceability.
Security is embedded into identities, endpoints, infrastructure standards and day-to-day operating processes.
Traceable configurations, clear responsibilities and operational knowledge improve supportability and maintainability.
Compliance, deployment success, policy conflicts, error rates and ticket volumes create a measurable basis for continuous improvement.
Device ComplianceDeployment SuccessPolicy ConflictsEnrollment ErrorsTickets per DeviceChange Success
Selected Enterprise Experience
Experience in demanding production environments.
My experience ranges from business-critical front-office infrastructure and large healthcare endpoint estates to virtualization and server projects in enterprise consulting.
Across these environments, the common requirements are availability, structured change and technical reliability.
Mission-Critical Trading Floor
Support and rollout delivery in a time-critical front-office environment at Deutsche Bank, including a large-scale Windows 11 migration and a two-node Proxmox cluster for automated Windows deployment via PXE.
Windows 11 MigrationProxmox + PXEFront-Office Support
~1,450 Workstations & Enterprise NotebooksEnterprise Client & M365 Operations
Infrastructure operations and project delivery at Frankfurt University Hospital using Microsoft 365, Intune, Entra ID, Exchange Online, change management and VIP support.
M365 / Intune / EntraVIP SupportChange Management
~1,800 Managed ClientsVirtualization & Server Engineering
Support for production VMware vSphere environments, Windows Server administration, Active Directory, enterprise server migrations, L2/L3 support and NGFW administration.
VMware vSphereWindows Server / ADFortiGate / Sophos
Enterprise Infrastructure & MigrationProfessional Foundation
Technical qualifications and certifications
Hands-on enterprise experience is complemented by two German IHK vocational qualifications together with VMware and CompTIA certifications.
VOCATIONAL QUALIFICATIONIT Specialist for System Integration (IHK Certified)
Focus areas: network administration, systems deployment and IT infrastructure management.
VOCATIONAL QUALIFICATIONIT Systems Electronics Specialist (IHK Certified)
Technical foundation in IT systems, hardware, infrastructure and systems integration.
CERTIFICATIONVMware Certified Technical Associate
Virtualization and VMware fundamentals complementing hands-on vSphere experience.
CERTIFICATIONSCompTIA Security+ · Network+ · Server+
Strong foundations in security, networking and server infrastructure.
Curriculum Vitae
Professional background & technical qualifications
The full CV covers professional roles, technical focus areas, project contexts, German IHK vocational qualifications, and VMware and CompTIA certifications.
Direct Contact
Contact
Direct contact for permanent opportunities, technical discussions and professional inquiries related to systems administration, enterprise infrastructure and endpoint engineering.
For a quick exchange, contact me directly by email or mobile.
Professional Exchange
Technical. Direct. Professional.
I welcome professional conversations around enterprise systems administration, endpoint engineering, virtualization and modern operating models.