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ALOIS Australia is a leading Talent and Technology Solutions company, focused on helping businesses across the country build stronger teams, smarter processes, and sustainable growth.

We work with organisations in diverse industries to deliver integrated workforce and technology solutions, from innovative hiring strategies to end-to-end digital transformation. Our approach combines data, insight, and human expertise to help clients solve complex workforce challenges with clarity and confidence.

Through our deep industry experience and commitment to excellence, we provide scalable, high-performance solutions that deliver measurable impact. Whether it’s onshore project delivery, workforce optimisation, or specialised technology services, ALOIS Australia ensures results that truly make a difference.

From Sydney to Perth and everywhere in between, we’re driven by one purpose: to empower Australian businesses and professionals to thrive in a rapidly changing world of work. At ALOIS Australia, every challenge is an opportunity to innovate, and every partnership is built on trust, transparency, and long-term success.

Job Title – Senior Onsite Network Engineer

Job Location – Melbourne

Experience – 8-10 years

Employment Type – Contract

Work Authorization: Applicants must have valid working/unlimited working rights in Australia. (Visa sponsorship or transfer is not available for this role)

Role Summary

We are seeking a Senior Onsite Network Engineer with 8-10 years of hands-on experience managing enterprise network infrastructure across physical datacentres and campus/site environments. You are a seasoned network professional who understands the core fundamentals of networking and datacentre operations - from cabling and rack-and-stack through to advanced routing, switching, and application delivery. You bring deep expertise in Cisco and Aruba platforms (physical and virtual, modern and legacy), and are an F5 BIG-IP expert with strong load balancer administration skills.

Critically, you have led or significantly contributed to IT separation programs at both a physical datacentre/site level and at an individual device level. This is an onsite role requiring physical presence for hands-on infrastructure work, incident response, and site-level project delivery.

Key Responsibilities

Core Network Services Management

- Manage and maintain all core network services across the enterprise - LAN, WAN, WLAN, DNS, DHCP, NTP, and internet edge
- Ensure high availability, performance, and resilience of network infrastructure supporting business-critical applications
- Design, implement, and maintain network segmentation (VLANs, VRFs, ACLs) aligned with security and operational requirements
- Manage network address planning (IP addressing schemes, subnetting, IPAM)
- Administer and troubleshoot routing protocols - OSPF, EIGRP, BGP (eBGP/iBGP), static routing
- Administer and troubleshoot switching technologies - STP/RSTP/MSTP, VTP, EtherChannel/LACP, port security, 802.1Q trunking
- Manage WAN connectivity - MPLS, SD-WAN, site-to-site VPN (IPSec, GRE), internet breakout
- Administer wireless network infrastructure - controller-based and cloud-managed deployments
- Manage DNS and DHCP services (Windows DNS, Infoblox, or equivalent)
- Monitor network health and performance using SNMP, NetFlow, syslog, and enterprise monitoring platforms

Cisco Platform Administration
- Administer and maintain Cisco routing platforms - ISR series (ISR 4000, ISR 1000), ASR series, CSR (virtual routers), Catalyst 8000
- Administer Cisco switching platforms - Catalyst 9000 series, Catalyst 3000/4000/6000 (legacy), Nexus 5000/7000/9000 (datacentre)
- Configure and manage Cisco ACI fabric or traditional Nexus-based datacentre switching where deployed
- Manage Cisco Wireless LAN Controllers (WLC) and Catalyst 9800 series controllers
- Administer Cisco firewalls - ASA and Firepower Threat Defense (FTD) managed via FMC
- Manage Cisco ISE for network access control (802.1X, MAB, profiling, posture assessment)
- Maintain Cisco DNA Centre / Catalyst Centre for network assurance and automation where deployed
- Support legacy Cisco platforms still in production (Catalyst 2960/3750, ISR G2 series) through to decommission
- Perform IOS/IOS-XE/NX-OS upgrades, patch management, and configuration standardisation

Aruba Platform Administration
- Administer Aruba wireless infrastructure - Aruba APs, Mobility Controllers, and Aruba Central (cloud-managed)
- Configure and manage Aruba CX switching platforms (CX 6000/8000 series) for campus and datacentre
- Manage Aruba legacy platforms (ArubaOS-Switch / ProCurve heritage) where still in production
- Implement and maintain Aruba Dynamic Segmentation and role-based access
- Administer Aruba ClearPass Policy Manager for network access control, guest access, and device profiling
- Manage Aruba SD-Branch and EdgeConnect SD-WAN where deployed




- Perform ArubaOS firmware upgrades, AP provisioning, and RF optimisation
- Maintain Aruba virtual platforms (VMC - Virtual Mobility Controllers) alongside physical appliances

F5 BIG-IP & Load Balancer Administration
- Serve as the F5 BIG-IP subject matter expert for the organisation
- Administer F5 BIG-IP LTM (Local Traffic Manager) - virtual servers, pools, nodes, monitors, persistence profiles, and iRules
- Configure and manage SSL offloading, certificate management, and TLS profiles on F5 platforms
- Administer F5 BIG-IP GTM/DNS for global server load balancing and DNS resolution
- Manage F5 BIG-IP ASM/Advanced WAF policies where deployed for application security
- Implement and maintain F5 BIG-IP APM for remote access and application-level access control where applicable
- Manage F5 platform upgrades (TMOS), hotfix deployment, and HA (active/standby, active/active) failover configurations
- Design and implement current load-balanced virtual services in collaboration with application teams
- Troubleshoot complex load balancing issues - health monitor failures, SSL handshake errors, persistence problems, iRule logic
- Manage F5 BIG-IP virtual editions (VE) alongside physical appliances
- Administer F5 via GUI (TMUI), CLI (TMSH), and iControl REST API for automation
- Produce and maintain F5 configuration documentation including VIP inventories, pool mappings, and certificate expiry tracking

IT Separation Programs (Datacentre & Device Level)
- Lead or significantly contribute to IT separation/divestiture programs involving physical network infrastructure
- Plan and execute site-level network separations - splitting shared datacentre environments into isolated network domains for divesting entities
- Perform device-level separations - reconfiguring shared routers, switches, firewalls, and load balancers to logically or physically segregate traffic between entities
- Design and implement transitional network architectures (DMZ interconnects, cross-connects, transit VLANs) to maintain service during separation transitions
- Migrate network services (DNS, DHCP, NTP, RADIUS/TACACS+) from shared to standalone infrastructure during separations
- Coordinate physical datacentre activities - cross-connect installations, cable migrations, rack relocations, and power/cooling considerations
- Manage firewall rule migrations and access control changes to enforce separation boundaries
- Decommission shared network infrastructure post-separation and validate clean removal
- Develop separation runbooks, cutover plans, rollback procedures, and risk registers
- Coordinate with project managers, application teams, and receiving entities on separation timelines and dependencies
- Validate post-separation network integrity - routing isolation, no traffic leakage, performance baseline confirmation

Datacentre & Physical Infrastructure
- Maintain physical datacentre network infrastructure - structured cabling (copper/fibre), patch panels, cable management, rack layout
- Manage datacentre interconnects - dark fibre, DWDM, cross-connects between cages/suites
- Understand and manage power and cooling considerations as they relate to network equipment placement
- Coordinate with datacentre facility teams on capacity planning, rack space allocation, and physical access
- Maintain physical network documentation - rack elevations, port maps, cable schedules, floor plans
- Manage hardware lifecycle - RMA processes, spare parts inventory, vendor hardware support contracts
- Perform hands-on rack-and-stack activities for new deployments and hardware refreshes
- Manage out-of-band management (OOBM) networks and console server access for remote recovery

Network Security
- Implement and manage firewall policies (Cisco ASA/FTD, Palo Alto, or equivalent)
- Configure and maintain VPN infrastructure - site-to-site IPSec, DMVPN, remote access VPN (AnyConnect)
- Administer network access control (Cisco ISE, Aruba ClearPass) - 802.1X, MAB, guest portals
- Implement micro-segmentation and zero-trust network access principles where applicable
- Manage DDoS mitigation and traffic scrubbing configurations
- Conduct regular firewall rule reviews and cleanup in coordination with security teams
- Support penetration testing and vulnerability remediation activities from a network perspective

Operations, Documentation & Leadership
- Serve as L3/L4 escalation point for all network infrastructure incidents and problems
- Provide onsite incident response for P1/P2 network outages - hands-on troubleshooting and restoration




- Participate in on-call rotation for critical network infrastructure
- Mentor and upskill junior network engineers on Cisco, Aruba, F5, and general networking
- Maintain comprehensive network documentation - topology diagrams (Visio/draw.io), configuration standards, runbooks, SOPs
- Participate in Change Advisory Board (CAB) meetings and own network change requests
- Plan and execute maintenance windows for firmware upgrades, hardware replacements, and configuration changes
- Collaborate with Security, Server, Cloud, and Application teams on cross-functional projects
- Manage vendor relationships and support contracts (Cisco TAC, Aruba TAC, F5 Support)
- Drive network modernisation and tech debt reduction initiatives

Required Experience & Skills
- 8-10 years of progressive experience in network engineering, with significant onsite/datacentre exposure
- Deep Cisco expertise - routing (ISR, ASR, CSR), switching (Catalyst, Nexus), wireless (WLC/9800), security (ASA/FTD), across modern and legacy platforms
- Strong Aruba expertise - wireless (APs, Mobility Controllers, Aruba Central), switching (CX series), ClearPass, including legacy ProCurve/ArubaOS-Switch platforms
- F5 BIG-IP expert - LTM administration (virtual servers, pools, monitors, iRules, SSL offloading), GTM/DNS, platform upgrades, HA management
- Proven experience in IT separation programs - physical datacentre/site-level separations and device-level logical/physical segregation
- Deep understanding of networking fundamentals - OSI model, TCP/IP, subnetting, routing protocols (OSPF, BGP, EIGRP), switching (STP, VLANs, LACP)
- Strong datacentre knowledge - structured cabling, rack-and-stack, cross-connects, power/cooling, physical documentation
- Experience with network security - firewalls, VPN, NAC (802.1X), ACLs, network segmentation
- Hands-on WAN/SD-WAN experience - MPLS, IPSec VPN, SD-WAN overlays
- Proficiency with network monitoring tools - SolarWinds (NPM/NCM), PRTG, or equivalent
- Experience with network automation - Ansible, Python (Netmiko, NAPALM), or equivalent
- Strong troubleshooting skills - packet capture analysis (Wireshark), protocol debugging, systematic root cause analysis
- Experience working within ITIL frameworks and ITSM tools (ServiceNow, Jira)
- Comfortable working in physical datacentre environments - lifting equipment, working in raised-floor environments, managing cabling
- Excellent communication skills - able to produce clear documentation and communicate with technical and non-technical stakeholders

Desirable / Differentiating Experience
- Cisco certifications: CCNP Enterprise (or higher), CCNP Security, CCIE (any track)
- Aruba certifications: ACNP, ACNX, or equivalent
- F5 certifications: F5 Certified Administrator, F5 Certified Technical Specialist (LTM)
- Experience with Palo Alto firewalls (additional to Cisco ASA/FTD)
- Hands-on with Cisco ACI fabric administration
- Experience with SD-WAN platforms (Cisco Viptela/SD-WAN, Aruba EdgeConnect, Fortinet)
- Background in network automation at scale - Ansible playbooks, Python scripting, CI/CD for network config
- Experience with cloud networking - AWS VPC/TGW, Azure VNets, or hybrid connectivity (Direct Connect/ExpressRoute)
- Familiarity with network-as-code principles and source-controlled configurations
- Experience in M&A; or divestiture programs spanning multiple sites or geographies
- Background in regulated industries (financial services, healthcare, government) with compliance requirements
- Experience managing large-scale network refresh programs (multi-site switch/router replacements)

Key Performance Indicators
- Network availability maintained at >99.95% across core infrastructure
- IT separation milestones delivered on schedule with zero unplanned outages or traffic leakage
- F5 virtual service availability >99.99% for business-critical applications
- Network incident MTTR within agreed SLAs (P1: <1 hour, P2: <4 hours)
- Zero critical audit findings related to network security (firewall rules, segmentation, NAC)
- Firmware/patch compliance across network estate within defined SLA windows
- Network documentation accuracy - quarterly audit with >95% accuracy
- Change success rate >98% (changes implemented without causing incidents)
- Successful mentoring - junior engineers handling L2 incidents independently within 6 months

Senior Onsite Network Engineer

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EEO Statement:

ALOIS Australia is committed to fostering a diverse and inclusive workplace. We provide equal employment opportunities to all qualified applicants and do not discriminate on the basis of race, colour, religion, sex, age, national origin, disability, or any other characteristic protected under applicable laws. We value diversity and believe it strengthens our people, our culture, and the outcomes we deliver.

📌 Senior Onsite Network Engineer (Melbourne)
🏢 ALOIS Australia
📍 Melbourne