Senior Network & Security Engineer - Hybrid, Mentoring

AC3; Sydney; Hybrid; AUD 140,000 - 180,000; Full time

Benefits offered by this job

Hybrid work (50% in Sydney CBD office)

Health insurance

Salary packaging

Half-day Fridays once a month

Career development opportunities

Job summary

AC3 is seeking a Senior Network & Security Engineer to design, build and secure complex networks across on‑prem, AWS and Azure with a hybrid work model in Sydney. You will mentor engineers, translate customer needs into practical infrastructure, and influence architecture decisions with senior stakeholders.

You’ll need 10+ years in Network & Security, strong Cisco R&S and cloud experience, and relevant certifications.

Qualifications

• 10+ years in Network & Security roles.
• Experience in MSP or consulting is a plus.
• Strong knowledge across Cisco R&S, SD-WAN, Azure, AWS.
• Certifications such as CCNA, CCNP, CCIE, Palo Alto or F5 are highly regarded.
• Australian citizenship, eligible for security clearance.

Responsibilities

• Review and improve Scope of Works (SOWs) with pre‑sales consultants/architects.
• Design and document network and security solutions and handover to delivery.
• Provide technical guidance for implementation and support of customer environments.
• Deliver and hand over relevant documentation for smooth onboarding.
• Identify and proactively resolve delivery issues and become a trusted advisor.

Skills

Network & Security

Customer communication

Mentoring

Independent

Pre-sales support

Tools

Cisco R&S

SD-WAN

Azure

AWS

Palo Alto

Fortinet

WiFi

Job description

AC3 is seeking a Senior Network & Security Engineer to design, build and secure complex networks across on‑prem, AWS and Azure with a hybrid work model in Sydney. You will mentor engineers, translate customer needs into practical infrastructure, and influence architecture decisions with senior stakeholders.

You’ll need 10+ years in Network & Security, strong Cisco R&S and cloud experience, and relevant certifications.