Pretoria: Systems / Networks Administrator (Ops Specialist) posted by Hire Resolve

About the Role

Hire Resolve is seeking a highly skilled and experienced Senior Systems/Network Administrator to join their team. This role is for a technical expert who thrives in command-line environments and possesses a holistic understanding of all interconnected system components.

Key Responsibilities

• Linux (CLI Expert): Provide expert-level administration for Debian (Ubuntu) and RedHat (Alma, Rocky) distributions. Provision and configure systems (servers, clusters, laptops) via the CLI. Manually install and configure LOB applications using config files (YAML, JSON). Monitor, troubleshoot system performance, and analyze logs/processes.
• Windows Server Ownership: Manage and maintain Windows servers, including Active Directory (AD/LDAP), DHCP, DNS, NPS, Certificate Services, IIS (with Dot Net/ASP/WebSockets), and Hyper-V. Provide user desktop support and manage file servers.
• Network Topology Management: Work with Core/Distribution/Access switching environments (Edgecore, MikroTik, UniFi, D-Link).
• Security & Configuration: Manage VLANs and implement modern tunneling (ZeroTier, WireGuard). Proficiently configure iptables/nftables, firewalld, and network bonding.
• Firewall Administration: Hands-on configuration and troubleshooting of FortiGate, MikroTik, and pfSense.
• Performance & Monitoring: Maintain network uptime, ensure critical service availability, and utilize monitoring applications (Zabbix, Nagios, etc.). IPAM/DCIM experience is essential.
• Storage Management: Manage SAN, NAS, DAS, LVM, and LUN infrastructure (HPE SAN, Synology, FreeNAS). Perform HBA bonding, SCSI configuration, and storage performance optimization.
• Hardware & HA: Assemble, upgrade, and troubleshoot server hardware. Configure RAID and other High Availability (HA) methods.
• Virtualization & Clusters: Administer Xen-based hypervisor clusters (XCP/Xen) and Hyper-V. Deploy, maintain, and troubleshoot virtualized environments, managing cluster performance and failover.
• Database Support: Provide basic support (backups, restores, minor SQL queries) for Postgres, Oracle, and MariaDB. Collaborate with DBA teams.
• Office & Asset Management: Implement ITIL-based best practices (ITSM). Manage assets (ITAM), including procurement, supplier negotiation, warranties, and SLAs.
• Soft Skills & Documentation: Write support/training documentation. Maintain strong written/verbal English communication. Work independently, manage multiple priorities, and collaborate effectively with interdepartmental teams (e.g., Finance, Audit). Be eager to learn new technologies.

Minimum Requirements

• Education: Bachelor’s Degree in Computer Information Systems, Management Information Systems (MIS), or a similar field.
• Required Certifications (or equivalent):
• A+, N+
• MTCNA
• ICND1, UBWA
• Linux+/LPIC1, Server+
• MCSA: Windows Server 2016
• Extensive technical management experience, preferably in a related industry.
• Advanced knowledge of IT Infrastructure innovation and integration.
• Methodologies: Full understanding of the IT Software Development Lifecycle (SDLC).
• Database Knowledge: Familiarity with basic SQL, database design, and working with data architects.
• Certifications: LPIC2, MCITP, MTCRE, CCNA, MCSE: Core Infrastructure, ITILv4, Security+.
• Methodologies: Experience with ITIL and AGILE Methodologies.

Benefits

Competitive salary based on experience (salary can potentially be more based on experience/skills)