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Tier 3 Infrastructure Engineer

Hire ResolveZA

3 hours ago

Job description

Job title : Tier 3 Infrastructure Engineer

Job Location : Gauteng,

Deadline : October 29, 2025

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Job Description

Hire Resolve's client is looking for a Tier 3 Infrastructure Engineer to join their team in Midrand, GP. The Tier 3 Infrastructure Engineer provides advanced technical support and expertise in maintaining, troubleshooting, and optimizing complex IT infrastructure systems.

This role involves managing high-level escalations, performing root cause analysis, and implementing solutions for network, server, and storage issues. The engineer will design, deploy, and support infrastructure solutions, ensuring system availability, security, and performance. They will collaborate with cross-functional teams to implement upgrades, support cloud and on-premise systems, and contribute to infrastructure projects. Strong knowledge in networking, virtualization, and enterprise-level systems is essential.

Responsibilities

Infrastructure Administration & Support :

Provide L2-L3 administration, troubleshooting, and maintenance for :

Fortinet Firewalls, IDS / IPS, VPN, Security Appliances & Cloud Security

Routing, Switching, and Wireless Networking

VMware vCenter and Hyper-V Hypervisors

Server Hardware and Components

Storage Infrastructure (SAN and vSAN)

Linux / Windows Systems Administration

Active Directory / Identity Management Administration

Azure, AWS, and Google Cloud Computing

Network & Systems Monitoring

Security Management :

Analyze and triage security events and alarms detected by the SIEM system

Respond to security incidents / threats logged on the service desk and remediate / mitigate as necessary

Manage / maintain security infrastructure and toolsets (Firewalls, Networking equipment, Vulnerability Management systems, SIEM, etc.)

Assist with designing, implementing, and managing endpoint management and security solutions (Anti-malware, Antivirus, Mobile Device Management)

Develop / maintain security safeguards around the organization’s cloud footprint

Projects & Improvement :

Assist with IT & Security related projects, rollouts, and infrastructure maintenance, including Backups (VEEAM), Business Continuity, and Disaster Recovery

Maintain / improve the security of IT systems through proactive monitoring and event management

Automate repetitive tasks

Provide technical input into company IT security standards and best practices aligned with industry standards (e.g., ISO27001, SOC 2)

Stay updated with industry trends around cybersecurity and provide input for business improvements and innovations

Team Collaboration :

Train and upskill junior staff

Action requests relating to Network, Security & Hyper-V Infrastructure logged on the service desk

Assist with other System Administration as needed

Requirements

Education and Certifications :

Microsoft MCSE / Cisco CCNA / VMware Certification

Linux / Azure / AWS / Google Cloud Certification

EC Council CEH / Security+ / CISSP

Fortinet FCP / FCSS

Technical Competencies :

10+ years of experience within a Network & Security support environment, working across network and server infrastructure both on-premise and in the Cloud

Minimum of 5 years of experience in the following :

Network administration and support for firewalls, switches, Wireless (Fortigate & Cisco), and VPN client connections

Windows 2012 and newer Server Administration and Active Directory / DNS / DHCP administration

Linux administration

Backup and recovery

System Administrator experience

Proven ability to administer and configure Virtual environments

Behavioural Competencies :

Strong interpersonal skills and ability to quickly form professional relationships with colleagues and clients at all levels of seniority

Excellent problem-solving skills

Used to working in a business culture that promotes adherence to procedures and controls

Display a strong sense of ownership and independent work ethic

Process-oriented and structured

Customer service orientated with a willingness to engage people and help

Flexible to work shifts depending on company requirements

Ability to prioritize and coordinate tasks efficiently, ensuring all deadlines are met

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