Senior Network Security Engineer, Commonwealth Bank of Australia, AU

Senior Network Security Engineer 

• You are highly experienced in building customer focussed solutions 

• We are a team of big thinkers, who love to push boundaries and create new solution 

• Together we will build tomorrow’s bank today, using world-leading technology and innovation 

Do work that matters: 

The purpose of this role is to provide design, implementation and support in order to drive excellence, quality and performance for an IT service, across one or multiple portfolios. The role has: 

• Active responsibility to work on the design, implementation & Network engineering for the Utilisation of standardised IT services to promote business value 

• Accountability to support and maintain the utility of provided services and meet the ongoing technology requirements for business, projects and IT stakeholders. 

• Provide support for escalation of operational issues whenever required. 

• Flexibility in working hours to accommodate after hour changes. 

See yourself in our team 

The Network Security Engineering team is responsible for delivering network security requirements and implementation to achieve business outcomes.

The GTS Networks team is responsible delivering, supporting and continuously improving the Bank’s Global Network and Security services.

Our Global Technology Services (GTS) products and services are leveraged across all Business Unit Platforms within the Bank to deliver industry-leading software including: CommBank App, Netbank, CommSee, CommSec, CommBiz and Commbank.com.au 

You will be reporting directly to a Chapter Lead as part of the Global Technology Services business unit. Your wider team consists of multiple squads in the Engineering disciplines of Network Security, Partner Connectivity, Workload Connectivity, Software Defined Network, Cloud Networking, Network Automation and Workforce Connectivity. 

CORE RESPONSIBILITIES

• Execute and support the Global Technology Services business unit with design, engineering and implementation of network security, to provide business value across multiple programmes and initiatives.

• Identify and mitigate issues or risks associated with the network security design or solution proposals

• Provide technical consulting and advice to projects to ensure alignment to Cyber Security, Network Architecture, and operational stability of CBA’s network assets.

• Practice engineering principles, patterns, standards and guidelines across projects and programmes

• Support transitioning target architecture from current to desired state

• Mentor to junior engineers and local team members

• Provide feedback on effectiveness of target solution architecture

• Work within a team environment and across business units to complete associated tasks

• Stay up to date on emerging Technology that may benefit the Group’s strategic direction

• Produce high quality, sustainable solutions to meet business requirements, leveraging approved delivery frameworks.

• Influence and guide stakeholders to ensure that solutions are robust, secure and highly available.

• Uplift the quality of technical solutions by applying industry best practice.

• Technical governance of project delivery to ensure successful delivery and adoption.

• Role model continuous improvement mindset in team and project interactions

• Manage escalation of complex technical issues from suppliers, operations and application teams

• Supporting and implementation of changes outside of regular business hours

• Author complex implementation plans and configuration of network security changes into CBA’s network services and devices

• Adhere to the Code of Conduct. The Code of Conduct sets the standards of   behaviour, actions and decisions we expect from our people.

• Undertake any other tasks assigned by your manager that you have the capability to perform safely in line with relevant internal Bank policies and external regulatory requirements.

We’re interested in hearing from people who 

• Are familiar with the Full Cycle model, where engineers are involved in Design, Build, Challenge and Run 

• Have a passion working with data centre networks. 

• Have experience with technology in a large organization 

Tech Skills

We use a broad range of tools, languages, and frameworks. We don’t expect you to know them all but experience or exposure with some of these (or equivalents) will set you up for success in this team;   

• Mandatory knowledge and demonstrated experience of Cisco Switches (Nexus and IOS), Routers and Firewalls.

• Author and maintain detailed network security design documents, ensuring accuracy and representation of firewall configuration and deployment of security policy.

• Extensive experience in Palo Alto/Cisco/NSX firewall technologies 

• Desirable experience in F5 GTM, LTM and DNS VMWare NSX, and Azure/AWS network security group enforcement policies and firewall management.

• Discovery and validation of network connectivity requirements using enterprise tools such as Algosec, vRealise Network Insight, Splunk, Azure VSTS, and AWS VPC flow logs, R53, Cloud redirect and Cloudfront, SolarWinds, Qualys, and Infoblox.

• Network scripting and automation tools such as Ansible, Python, NSO, Yang, Terraform, JSON Script 

• Contribute to the documenting of current infrastructure services.

• Demonstrated understanding and design of core switching and routing technologies such as VXLAN, VPN BGP, and OSPF.

• Mentoring of Engineers across multiple technologies

• Flexibility in working hours to accommodate after hour changes

Working with us 

Whether you're passionate about customer service, driven by data, or called by creativity, a career with CommBank is for you. Our people bring their diverse backgrounds and unique perspectives to build a respectful, inclusive, and flexible workplace with flexible work locations. 

Here, you’ll thrive. You’ll be supported when faced with challenges and empowered to tackle new opportunities. We’re hiring engineers from across all of Australia and have opened technology hubs in Melbourne and Perth. We really love working here, and we think you will too.   

We support our people with the flexibility to balance where work is done with at least half their time each month connecting in office. We also have many other flexible working options available including changing start and finish times, part-time arrangements and job share to name a few. Talk to us about how these arrangements might work in the role you’re interested in. 

If this sounds like the role for you then we would love to hear from you. Apply today! 

Advertising End Date: 29/09/2025