Senior DevSecOps Engineer

Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions.

We are seeking a Senior DevSecOps Engineer based in Macquarie Park, Sydney to own the technical direction and day-to-day execution of our DevSecOps strategies and platform delivery goals. You'll work closely with the Associate Director to drive group-wide initiatives, provide deep technical guidance, and coordinate engineering effort across the team. If you thrive in a hands-on senior role where you can shape platform strategy, mentor peers, and embed modern security practices across the delivery lifecycle — this one's for you.

What You'll Do

• Drive day-to-day technical prioritisation across the team, including backlog refinement, sprint planning, and coordination of parallel workstreams.
• Design, implement, and govern CI/CD pipelines using GitLab CI, ArgoCD (GitOps), and secrets management platforms such as HashiCorp Vault.
• Operate and troubleshoot Kubernetes clusters (OpenShift/Rancher) in production environments.
• Build and maintain GCP infrastructure using Terraform, supporting GKE, VPC networking, IAM, monitoring, and cost optimisation.
• Govern security pipeline stages across the SDLC — including SAST, DAST, SCA, and quality gate enforcement — ensuring findings are actioned before promotion.
• Engage cross-functional teams (Software Operations, Platform, Testing, Delivery, Architecture) to align on tooling, standards, and delivery approaches.
• Produce and maintain documentation and operational runbooks in Confluence.

What makes you perfect for the role?

• Advanced Kubernetes operations (OpenShift/Rancher) with strong production troubleshooting experience.
• Hands-on GCP experience across provisioning, operations, monitoring, and incident response (GKE, VPC, IAM).
• Solid CI/CD pipeline design and governance skills using GitLab CI, with GitOps delivery patterns via ArgoCD.
• Infrastructure-as-Code proficiency using Terraform and/or Ansible, plus strong scripting in Python and Bash.
• Experience with pipeline security tooling (SAST, DAST, SCA) and secrets management (HashiCorp Vault or equivalent).
• Strong hands-on experience with Red Hat Enterprise Linux and container hardening.
• Ability to mentor peers and provide technical leadership across a platform engineering team.

The good stuff….

• 💜 Competitive remuneration and employee discounts. Make life easier (and more affordable) with $80 monthly credit and 25% off Optus products and unique shopping discounts with our retail partners.
• 🏠 Flexible working arrangements with opportunities to work three days in the office, two days remote or home.
• 🙌 Vibrant and collaborative office campus that includes cafes, convenience store, chill out zones, GP, post office, gym and on-site childcare centre.
• 📅 Competitive leave policies, including additional 'Connected' days to focus on culture, family, health, community, or whatever's important to you.
• 👨‍👩‍👧 We support growing families with inclusive, carer-neutral paid Parental Leave of up to 16 weeks.
• 🌱 Direct your own development and build future-ready skills with Optus U's industry-focused micro-credentials, developed with La Trobe and Macquarie Universities.
• 🤝 Build meaningful connections through employee-led networks and diversity initiatives including Culture Connect, Elevate Women, Disability Network and Express Yourself (LGBTQIA+).
• 🧘 Put your wellbeing first with free access to counselling and support services, 24/7 — in-person, by phone, SMS, or video.
• 🚌 Free Optus bus from Macquarie University Metro Station (every 6-8 minutes); morning and afternoon.

At Optus, we are strengthened by others and that means valuing diversity and saying 'yes' to embracing individual differences. We are committed to ensuring that our application process provides an equal employment opportunity to all job seekers, including individuals from diverse gender, cultural and linguistic backgrounds, individuals with a disability, individuals identifying as being part of the LGBTQIA+ community, individuals who may have served in the armed forces or who identify as Aboriginal and/or Torres Strait Islander. We also want to do our best to make our recruitment process inclusive. If you require any adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email [email protected] or call 1800 309 170. For more information on Diversity, Inclusion & Belonging at Optus, please visit https://www.optus.com.au/about/inclusion-diversity