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Senior Systems / Networks Administrator (Ops Specialist)

Hire ResolveZA

4 days ago

Job description

Job title : Senior Systems / Networks Administrator (Ops Specialist)

Job Location : Gauteng,

Deadline : October 25, 2025

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Job Description

A leading Software Development company is looking for a Senior Systems / Networks Administrator (Ops Specialist) tjoin their team in Irene, GP. The ideal candidate will have extensive hands-on experience with both Linux and Windows environments, advanced networking, virtualization, storage solutions, and system clusters. This role demands technical expertise, a strong troubleshooting mindset, and the ability twork independently with minimal supervision. Attention tdetail is essential, along with a holistic understanding of all interconnected components.

Responsibilities :

Linux Systems Administration

Expert-level administration of Debian-based distributions (Ubuntu) and RedHat derivatives (Alma, Rocky).

Provisioning and configuring servers, clusters, laptops, and other devices via the CLI.

Installation and configuration of LOB (Line-of-Business) applications manually—config files (YAML, JSON).

Monitoring and troubleshooting system performance, processes, and logs tensure smooth operations.

Participating in interviews and tests focused on troubleshooting system issues based on log output and process analysis.

Windows Systems Administration

Managing and supporting Windows servers in a range of functions, including Active Directory (AD / LDAP), DHCP, DNS, NPS, Certificate Services, IIS, and Hyper-V.

Knowledge of IIS modules (Dot Net, ASP, WebSockets).

Providing user desktop support and managing Windows-based file servers.

Taking ownership of Windows Server maintenance and administration tasks

Networking

Working in environments with Core / Distribution / Access-switching topologies, high- throughput aggregation switches, and edge / access switches (Edgecore, MikroTik, UniFi, D-Link).

Managing VLANs, implementing modern tunneling technologies such as ZeroTier and WireGuard, and being well-versed in iptables / nftables, firewalld, and network bonding techniques.

Hands-on configuration and troubleshooting of FortiGate, MikroTik, pfSense, and other similar systems.

Maintaining network performance and ensuring uptime for critical services.

Knowledge of monitoring applications such as Zabbix, Nagios, Data Dog and New Relic.

IPAM / DCIM experience essential.

Database Support

Providing basic support for Postgres, Oracle, and MariaDB environments (backups, restores, and minor SQL queries).

OracleDB knowledge advantageous, including the use of Oracle Data Pump and TNS Listener troubleshooting.

Collaborating with DBA teams tensure database availability and performance.

Server Hardware & Storage Administration

Manage SAN, NAS, DAS, LVM, and LUN infrastructures. From setting up and configuring HPE SAN systems tmanaging Synology, Seagate NAS and FreeNAS devices.

Perform tasks such as HBA bonding, SCSI configuration, and storage performance optimization.

Server hardware – assembly / upgrades and troubleshooting

RAID and other HA methods, including setup and best practice configurations.

Veeam Backup and Quest NetVault experience advantageous.

Familiarity with LTO-tape technology and how it works and is used will be advantageous.

Virtualization & Cluster Management

Administering Xen-based hypervisor clusters (XCP / Xen Hypervisors) and Hyper-V environments.

Deploying, maintaining, and troubleshooting virtualized environments.

Managing cluster performance, failover, and storage integration.

Past hands-on experience with Hyper-V clusters and VMWare vSphere advantageous.

Knowledge of Docker, Kubernetes, and containerization technologies is advantageous.

Office Administration & Soft Skills

Implementing ITIL-based best practices (ITSM).

Managing assets (ITAM), including hardware procurement, supplier negotiation, warranties, and SLAs.

Familiarity with JIRA and Confluence is advantageous.

Requirements :

Bachelor's degree in Computer Information Systems, Management Information Systems, or a similar field.

Extensive experience in technical management, preferably within a related industry.

Advanced knowledge of IT infrastructure, information systems innovation, and integration.

Full understanding of the IT Software Development Life Cycle (SDLC).

Experience with server installation, maintenance, and monitoring.

Familiarity with database management best practices, design, theories, and queries.

Knowledge of database structure languages (e.g., SQL, SQL / PSM).

Ability tcollaborate with data architects and IT specialists tset up, maintain, and monitor data networks.

Proficiency in diagnosing faults, incidents, and problems and implementing effective changes.

Experience with ITIL and AGILE methodologies is advantageous

Certifications :

A+ & Network+

MTCNA

ICND1

UBWA

Linux+ / LPIC-1

Server+

MCSA : Windows Server 2016 (or nearest equivalent)

Certifications :

LPIC-2

MCITP

MTCRE

CCNA

MCSE : Core Infrastructure

ITILv4

Security+

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