Job Title: Senior / Principal IP Networks & Security Architect

Experience: 10–15+ years

Role Overview

We are seeking a highly experienced IP Networks & Security Architect to lead the design, evolution, and governance of large-scale service provider networks. This role is focused on advanced routing architectures, MPLS-based services, and security frameworks within mobile operator environments.

The ideal candidate will bring deep expertise in eBGP, L3VPN, and edge security, with hands‑on experience across multi‑vendor ecosystems.

Key Responsibilities:

- Design and architect scalable IP/MPLS networks supporting mobile core, aggregation, and edge environments.
- Develop and optimize routing strategies using eBGP, iBGP, OSPF/IS-IS, and advanced traffic engineering techniques.
- Architect and maintain MPLS services including L3VPN, L2VPN, and segment routing (preferred).
- Lead the integration of IP networks with mobile packet core (4G/5G), including Gi/SGi/N6 interfaces.
- Define and implement network security architecture, including edge firewall placement, segmentation, and policy control.
- Evaluate and integrate firewall solutions (Fortinet, Check Point, Cisco)



into service provider environments.
- Drive high availability and resiliency designs (quick convergence, redundancy models, failure domains).
- Provide technical leadership for network transformation initiatives, including virtualization and cloud integration.
- Collaborate with operations, engineering, and vendors for deployment, troubleshooting, and optimization.
- Produce high- and low-level design documentation (HLD/LLD), standards, and architectural guidelines.

Required Skills & Experience:

- 10–15+ years in IP networking, with significant experience in service provider or mobile operator environments.

Strong expertise in:

- eBGP (multi-homing, route policies, scaling, convergence tuning)
- MPLS (L3VPN, LDP, RSVP-TE, Segment Routing preferred)
- Core routing protocols (IS-IS, OSPF)
- Deep understanding of mobile network architectures (4G EPC, 5G Core) and IP transport integration.
- Proven experience with edge security design and firewall technologies.
- Hands‑on experience with at least two of the following vendors:

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📌 Senior IP Network Security Architect (City of Sydney)
🏢 CareCone Group
📍 City of Sydney