24.10.2026 aktualisiert
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Senior System Engineer (Contractor / Freelancer)
Turbenthal, Schweiz
Turbenthal +25 km
Master of Advanced Studies in IT ReliabilityÜber mich
Erfahrener System Engineer mit 20+ Jahren Praxis im KMU/Gemeinde-Umfeld. Fokus auf Design, Betrieb & Troubleshooting komplexer IT-Infrastrukturen. Analytisch stark, kundenorientiert und bekannt für klare Dokumentation. Übernehme schnell Verantwortung, sowohl im Tagesgeschäft als auch in Projekten.
Skills
ProxmoxWLANSystems EngineeringHyper-VVPNNagiosRoutingFortinetCiscoServicenow
Infrastructure Management & Architecture
Data center migrations on-premise and cloud, infrastructure virtualization with ESX, Hyper-V, PROXMOX, and comprehensive life cycle management
Campus LAN & WLAN
Cisco and Aruba switching across access, distribution and core layers, VLAN, STP, LACP, QoS, multicast configurations, L2/L3 troubleshooting including ARP, routing, loops and performance issues
Security
VPN access solutions, L2/L3 network support, security remediation, firewall and UTM configuration with Sophos, Fortinet, pfSense, OPNsense, network segmentation and Zero Trust concepts
System Engineering & OS
Core infrastructure technologies including server, network and storage systems, Windows Desktop and Server environments across all versions, Linux distributions including RHEL, Ubuntu and Debian
Unified Communication & Collaboration
SharePoint, Teams M365, Confluence platforms, Exchange systems, VoIP and video conferencing solutions
Methodologies & Tools
ITIL V3 Foundation application, TOGAF and Prince2 frameworks, monitoring systems like PRTG, CheckMK, Nagios, ticketing systems including ServiceNow and Jira
Operations & Documentation
Change, incident and problem management processes, clear and structured technical documentation, customer and stakeholder communication, ITIL-oriented process workflows
WLAN Design & Operations
Enterprise WLAN design and operation, Ubiquiti Access Points, RF fundamentals, coverage planning and performance optimization, client connectivity troubleshooting
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit2017
Sprachen
DeutschMutterspracheEnglischverhandlungssicher
Projekthistorie
Lifecycle management of Windows application servers, server rollout and configuration automation, Windows 11 client environments, site-to-site and client VPN lifecycle management, SD-WAN migration, switch connectivity and daily operations, on-site and remote troubleshooting
Planning, implementation and operation of on-premise and cloud IT infrastructures, switching and routing using Cisco, Aruba and Fortinet, site interconnections and VPN solutions, WLAN rollouts including access points and switch integration, on-site and remote troubleshooting, technical documentation and handover to operations teams, direct customer interaction and technical consulting
MS Teams Backend Configuration, Rollout on 50+ devices including telephony