Senior System Administrator

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🔥 9 minutes ago

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OnHires

11 - 50 employees

Founded 2020

🎯 Recruiter

👥 HR Tech

🤝 B2B

Recruitment • HR Tech • B2B

OnHires is a global IT recruitment and staffing partner that sources, vets, and places technical and creative talent for fast-growing companies. They provide services including vetted developers, sourcing, executive search, talent mapping, RPO, HR consulting, and flexible hiring models (subscription, pay-per-hire, hourly), with a focus on fast, high-quality hires and scalable talent pipelines.

📋 Description

• Administer and troubleshoot Windows and Linux servers • Support Microsoft Hyper-V and VMware environments • Diagnose issues with Dell and Supermicro servers • Resolve customer incidents involving VPS, dedicated servers, virtualisation, and connectivity • Maintain Active Directory, DNS, Group Policy, backups, and monitoring • Support data centre infrastructure, storage, and networking • Participate in upgrades, migrations, and infrastructure improvement projects • Maintain clear technical documentation and follow change-management procedures

🎯 Requirements

• 7+ years of systems, infrastructure, or data-centre experience • Strong hands-on experience with Windows Server and Linux • Strong hands-on experience with Hyper-V and VMware • Strong hands-on experience with Dell and/or Supermicro servers • Strong server and virtualisation troubleshooting experience • Experience in data centres, hosting, managed services, or another 24/7 infrastructure environment • Good understanding of networking, storage, backup, and disaster recovery • Strong spoken and written English • Reliable, organised, and comfortable taking ownership of issues through resolution • Independent contractor engagement • Approximately 10–15 hours per week • VPS, dedicated hosting, or IaaS experience is nice to have • iDRAC, IPMI, SAN/NAS or Veeam experience is nice to have • PowerShell, Bash, Python, or Ansible experience is nice to have • Experience in fintech, trading, telecom, broadcast, or other mission-critical environments is nice to have

🏖️ Benefits

• Long-term part-time engagement • Remote work • Primarily European business hours • Rotating on-call coverage by agreement

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