Senior Incident Responder

Singapore Telecommunications; Sydney; Hybrid; AUD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible work

Employee discounts

On-site gym

Parental leave 16 weeks

Wellbeing support

Job summary

Optus is seeking a Senior Incident Responder to join our Cyber Defence Operations team in Australia. You will lead major security incidents, coordinate across technical and business stakeholders, and drive containment, eradication, and recovery efforts across complex environments.

You will own communications with leadership, legal, and impacted teams, perform advanced digital forensics, and help uplift our capabilities through exercises and improved tooling.

Qualifications

• Extensive experience in cyber incident response, digital forensics, and security operations.
• Experience leading major cyber security incidents with multiple stakeholders.
• Familiarity with regulatory requirements and evidence handling practices.

Responsibilities

• Lead response to major cyber security incidents as incident commander across multi-team investigations.
• Direct containment, eradication, and recovery with cross-team coordination.
• Perform advanced forensics across host, memory, network, identity and cloud environments.
• Own communications to leadership, legal, and impacted business units during incidents.
• Act as escalation point for incident responders on high-impact events.
• Review casework and evidence handling; uphold investigative standards.
• Lead cyber readiness activities: simulations, reviews, and capability uplift.
• Improve incident response tooling, procedures, and playbooks.
• Participate in 24x7 on-call roster for high-priority incidents.

Skills

Incident response leadership

Digital forensics

Security operations

Scripting and analysis

Communications with executives

Education

Cyber Security degree

Tools

SIEM

XDR

EDR

Log analysis

Job description

Optus is a leading Telecommunications company known for delivering innovative solutions to its customers, disrupting the industry, and evolving as a technology company with a diverse portfolio of products and services. As cyber threats continue to evolve, protecting our customers, people, and business remains a critical priority.

We're looking for a Senior Incident Responder to join our Cyber Defence Operations team. This is an exceptional opportunity to play a leading role in defending one of Australia's largest and most complex technology environments, driving incident response outcomes and enhancing our cyber resilience.

Optus is a leading Telecommunications company known for delivering innovative solutions to its customers, disrupting the industry, and evolving as a technology company with a diverse portfolio of products and services. As cyber threats continue to evolve, protecting our customers, people, and business remains a critical priority.

We're looking for a Senior Incident Responder to join our Cyber Defence Operations team. This is an exceptional opportunity to play a leading role in defending one of Australia's largest and most complex technology environments, driving incident response outcomes and enhancing our cyber resilience.

What You'll Do

Partnering closely with the Director, Incident Response & Readiness and key stakeholders across Optus, you will be responsible for:

• Leading the response to major cyber security incidents, acting as incident commander across complex, multi-team investigations and recovery efforts.
• Directing containment, eradication, and recovery activities while ensuring clear coordination across technical teams and business stakeholders.
• Performing advanced digital forensic investigations across host, memory, network, identity, and cloud environments.
• Owning communications throughout significant incidents, providing clear and actionable updates to leadership, legal, and impacted business teams.
• Acting as the primary escalation point for Incident Responders on complex, sensitive, or high-impact security events.
• Maintaining investigative excellence by reviewing casework, forensic methodologies, and evidence handling practices.
• Leading cyber readiness activities, including simulation exercises, incident reviews, and capability uplift initiatives.
• Driving continuous improvement across incident response tooling, automation, procedures, and playbooks.
• Participating in the 24x7 on-call roster as a senior escalation point and incident commander for high-priority events.

What You'll Bring

• Extensive experience in cyber incident response, digital forensics, and security operations within large or complex environments.
• Proven experience leading or commanding major cyber security incidents involving multiple stakeholders and technical domains.
• Deep expertise in forensic investigations across endpoints, memory, networks, identities, and cloud platforms.
• Strong understanding of evidence handling, investigative methodologies, and regulatory or legal requirements.
• Experience using SIEM, XDR, EDR, and log analysis tools to investigate and respond to sophisticated threats.
• Strong scripting and analytical capabilities to support large-scale investigations and threat analysis.
• Excellent communication skills with the ability to engage technical teams, executives, legal stakeholders, and external partners.
• Calm, decisive leadership under pressure and a track record of delivering successful outcomes during high-impact incidents.
• Relevant qualifications in Cyber Security, Digital Forensics, Computer Science, or a related discipline. Industry certifications such as GCFA, GREM, GNFA, or GCIH 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.

If you require adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email ***************@optus.com.au or call 1800 309 ***. We're here to help.