Systems / Networks Administrator (Ops Specialist)

Hire Resolve; Johannesburg; On-site; ZAR 600,000 - 800,000; Full time

Job summary

A leading staffing provider seeks a Senior Systems/Network Administrator in Johannesburg, South Africa. Ideal candidates will have strong experience in both Linux and Windows systems, comprehensive networking skills, and the ability to work independently. Responsibilities include managing network performance, overseeing server operations, and providing support for database environments. Candidates should possess a relevant bachelor's degree and hold certifications such as A+ & N+. Join a dynamic team and advance your career in a challenging and rewarding environment.

Qualifications

• Extensive hands-on experience with Linux and Windows environments.
• Technical management experience in a related industry.
• Knowledge of database structures and SQL.

Responsibilities

• Administer both Linux and Windows servers.
• Manage networking components and troubleshoot issues.
• Support database environments and ensure availability.
• Administer storage infrastructures and optimize performance.

Skills

Linux and Windows systems administration

Networking expertise

Troubleshooting mindset

Virtualization experience

Communication skills

Education

Bachelor's degree in computer information systems or similar

Tools

Debian-based distributions (Ubuntu)

RedHat derivatives (Alma, Rocky)

IIS

Docker

Hyper-V

FortiGate

Job description

Hire Resolve's client is looking for a highly skilled and experienced Senior Systems/Network Administrator to join their team in Centurion, EC. 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 to work independently with minimal supervision. Attention to detail 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 to ensure 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/ip6tables, 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, DataDog, 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 to ensure database availability and performance.

Server Hardware & Storage Administration

• Manage SAN, NAS, DAS, LVM, and LUN infrastructures. From setting up and configuring HPE SAN systems to managing 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.

• Experience collaborating with interdepartmental teams, such as Finance and Audit.

• Strong English communication skills, both written and verbal, with professional email etiquette.

• Writing of support and training documentation.

• Strong troubleshooting and analytical abilities.

• Ability to work independently and unsupervised, manage multiple priorities in a fast‑paced environment.

• Eagerness to learn new technologies and systems, be curious!

Requirements:

• A bachelor's degree in computer information systems, management information systems, or similar.

• Certifications: A+ & N+, MTCNA, ICND1, UBWA, Linux+/LPIC1, Server+, MCSA: Windows Server 2016—or the nearest equivalent of the aforementioned.

Desired Certifications

LPIC2, MCITP, MTCRE, CCNA, MCSE: Core Infrastructure, ITILv4, Security+.

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

• Advanced knowledge of IT Infrastructure and Information Systems innovation and integration.

• Ability to manage IT support teams.

• Familiarity with database queries.

• Knowledge of database design and theories.

• Ability to work with data architects and other IT specialists to set up, maintain, and monitor data networks.

• Knowledge of database structure languages, such as SQL or SQL/PSM.

• Experience with server installation and maintenance.

• Familiarity with database management best practices.

• Has a full understanding of the IT SDLC.

• Experience in ITIL and AGILE Methodologies advantageous.

• Ability to diagnose faults, incidents, and problems, and implement required changes.

• Ensuring optimal hardware and software functionality, as well as network security.

• Exceptional communication and interpersonal skills.

If you are looking for career advancement and new environments, kindly forward your CV to Gaby Turner [e-mail] or you may forward your CV to [e-mail].