Job Description

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

The Enterprise Security Architect is accountable for defining and driving security architecture strategy, standards, and innovation for their designated domain within Optus. As a principal-level architect, this role establishes enterprise-wide architecture standards, leads strategic technology initiatives, provides thought leadership, and ensures security architecture excellence across their domain of expertise.

As a member of the Enterprise Security Architecture team and Security Architecture Chapter, this Principal Architect provides strategic guidance and technical authority to platform engineering teams, conducts advanced security research and proof-of-concepts, mentors embedded platform architects, and drives security architecture alignment across the organization.

This is a senior technical leadership role (individual contributor) requiring deep domain expertise, thought leadership capability, and the ability to influence enterprise-wide security strategy and platform engineering delivery through architectural authority, innovation, and technical excellence without direct management responsibility.

What You’ll Do

• Design and drive the security architecture vision and strategy for the domain, establishing standards and reference architectures aligned to business and industry best practice.
• Evolve and integrate domain security architecture across the enterprise, providing thought leadership to address emerging threats and ensure cohesion.
• Develop and maintain architecture standards and patterns, covering security controls, integrations, data flows, and technology configurations.
• Govern architectural decisions and adoption, maintaining ADRs and repositories and embedding standards and best practices across engineering teams.
• Drive security technology research and innovation, evaluating emerging threats, platforms, and vendors, and leading proof‑of‑concepts for future capabilities.
• Provide architectural authority to platform teams, reviewing designs, resolving complex issues, and ensuring alignment with enterprise architecture.
• Enable governance, mentorship, and cross‑domain collaboration, representing the domain in enterprise forums and developing architectural capability across teams.

What makes you perfect for the role?

• Bachelor’s degree (minimum) in Computer Science, Information Security, or related field, with strong grounding in enterprise and security architecture disciplines.
• 12+ years in information security, including 7+ years in security architecture and 3+ years in senior/principal/enterprise architect roles.
• Proven experience designing enterprise‑scale security architectures in large, complex, and regulated environments.
• Expert knowledge of domain security technologies, platforms, and frameworks and integration architectures.
• Strong architectural governance and documentation capability, including standards, reference architectures, ADRs, and architecture models.
• Recognised architectural leader with strong communication, influence, and mentoring skills, able to balance strategic rigor with pragmatic delivery across teams.

What’s in it for you?

• 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.
• 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.

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 AccessibleRecruitment@optus.com.au or call 1800 309 170. We're here to help. When you contact us, please advise your preferred method of contact and we will be in touch within 48 hours.

For more information on Diversity, Inclusion & Belonging at Optus, please visit https://www.optus.com.au/about/inclusion-diversity