Senior Cyber Exposure Specialist (Sydney, Australia)

Singtel; Sydney; Hybrid; Confidential; Full time

Benefits offered by this job

Competitive remuneration

Hybrid work arrangement

Employee discounts

Counselling and wellbeing support

On-site facilities

Job summary

Optus is seeking a senior security professional to lead exposure management, vulnerability lifecycle, and risk prioritisation across external and internal surfaces. You will collaborate with infrastructure, cloud, and development teams to drive remediation and enhance cyber resilience.

The role requires deep knowledge of attack surface management, threat intel and MITRE ATT&CK, plus strong stakeholder engagement and automation skills. Hybrid work options are available.

Qualifications

• Experience across the exposure lifecycle from discovery to remediation.
• Strong technical understanding of cloud, containers, APIs and CI/CD.
• Proven ability to prioritise risk using threat intel and business impact.
• Ability to translate technical findings into business risk and actions.

Responsibilities

• Lead threat exposure management across external and internal surfaces.
• Manage discovery, triage, validation and remediation tracking.
• Prioritise exposures by exploitability and business impact.
• Coordinate rapid remediation for incidents and zero-days.
• Collaborate with infrastructure, cloud, engineering and app teams.
• Validate exposures via attack-path analysis and safe exploitation.
• Turn exposure findings into detections and security controls.
• Drive tooling, automation, reporting and process improvements.

Skills

Exposure Management

Vulnerability Management

Attack Surface Management

Offensive Security

Security Analytics

KQL/SPL/SQL/XQL

Automation Scripting

MITRE ATT&CK

Stakeholder Engagement

Education

Cyber Security/IT/CS degree

OSCP/CISSP/GCIH/GWAPT (certifications)

Vendor security certifications (Tenable/Qualys/Rapid7)

Tools

Tenable

Qualys

Rapid7

Cloud/Container security tooling

Attack surface management platforms

Job description

Optus is a leading Telecommunications company that is known for delivering innovative solutions to its customers, disrupting the industry, and becoming a technology company with a diverse offering of products and services. With a strong commitment to excellence and a customer-centric approach, we're dedicated to protecting our customers, networks and critical infrastructure against an increasingly complex cyber threat landscape.

What You'll Do

Partnering closely with the Director, Exposure Management and stakeholders across Optus, you will be responsible for:

• Leading continuous threat exposure management activities across Optus' external attack surface and internal vulnerability landscape, maintaining a threat-informed view of cyber risk.
• Continuously discovering, investigating and managing internet-facing assets, exposed services, APIs, cloud resources, certificates, shadow IT and third-party dependencies.
• Driving the end-to-end vulnerability management lifecycle including scanning, triage, validation, prioritisation, remediation tracking and verification.
• Prioritising exposures based on exploitability, business impact, attack-path reachability and threat intelligence rather than severity scores alone.
• Managing cyber exposure incidents, including zero-day vulnerabilities, mass exploitation events and software supply chain compromises, coordinating rapid assessment and remediation activities.
• Partnering with infrastructure, cloud, engineering and application teams to drive remediation to closure and improve organisational cyber resilience.
• Validating exposures through attack-path analysis, breach and attack simulation, and safe exploitation techniques to focus efforts on genuine risk.
• Collaborating with threat hunting, detection engineering and incident response teams to convert exposure findings into actionable detections and security controls.
• Driving continuous improvement across exposure management tooling, automation, reporting, metrics and operational processes.

What You'll Bring

• Extensive experience in Exposure Management, Vulnerability Management, Attack Surface Management, Offensive Security, or a related cyber security discipline.
• Strong hands-on experience managing the exposure lifecycle from discovery through remediation and risk reduction.
• Deep understanding of modern enterprise technology environments, including cloud platforms, infrastructure, applications, containers, APIs, CI/CD pipelines and identity systems.
• Experience using vulnerability management, attack surface management and exposure management platforms to assess and prioritise cyber risk.
• Proficiency with security analytics and query languages such as KQL, SPL, SQL or XQL, along with scripting skills for automation and analysis.
• Strong understanding of vulnerability exploitation, attack-path analysis, threat intelligence and MITRE ATT&CK frameworks.
• Exceptional stakeholder engagement skills, with the ability to influence remediation outcomes across teams you do not directly manage.
• Strong written and verbal communication skills, capable of translating technical findings into meaningful business risk and action plans.
• Relevant qualifications in Cyber Security, Information Technology, Computer Science or equivalent experience. Industry certifications such as OSCP, CISSP, GCIH, GWAPT or vendor certifications from Tenable, Qualys or Rapid7 will be highly regarded.

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.

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 [e-mail] or call 1800 309 170. We're here to help.