Ernst & Young

Ernst & Young

Global professional services: consulting, tax, assurance.

Cyber Defense Incident Responder

Full-Time
No salary listed
Expert
Bachelor's, Master's
Sydney NSW, Australia
In Person

About the job

Requirements
  • A Bachelor's or Master's Degree in Computer Science, Information Systems, Engineering, a related field, or equivalent experience.
  • 10+ years’ collective experience across Information Security Professional and Information System Administration/Engineering roles.
  • 5+ years’ collective experience across Security Operations Center Analyst/Manager, Cybersecurity Threat Intelligence, Cybersecurity Detection Engineering, other relevant Cyber Defense functions, Attack & Penetration Testing, or eDiscovery/forensic roles.
  • 3+ years’ collective experience across Cybersecurity Digital Forensics Incident Response Analyst/Manager and Cybersecurity Incident Coordinator roles.
  • Intricate understanding of security threats, vulnerabilities, and incident response.
  • Mastery of electronic investigation, forensic tools and methodologies, log correlation and analysis, forensic handling of electronic data, computer security investigative processes, and malware identification and analysis.
  • Familiarity with the legalities surrounding electronic discovery, collection, and analysis of digital evidence.
  • Understanding of network topology and protocols.
  • Understanding of and adaptability to regulatory stipulations regarding security incidents on a global scale.
  • Experience operationalizing automation to support process efficiency.
  • Experience with Security Information and Event Management technologies, including Sentinel, cloud-based management and investigation consoles, including Azure, and other digital forensics analysis tools.
  • Deep understanding of Windows and Unix/Linux operating systems, with adaptability to previously unknown interfaces, operating systems, consoles, and non-standard devices such as kiosks, Internet of Things devices, and mobile phones.
  • Willingness to be on-call during off-hours in rotation with other team members.
  • Ability to coordinate high-profile, complex, and global cybersecurity incidents from incident declaration through resolution.
  • Ability to identify cybersecurity incident gaps and drive post-incident lessons-learned efforts to resolution.
  • Comprehensive knowledge of Information Security domains and associated technologies to support collaboration, eradication, remediation, and gap assignment during cybersecurity incidents.
  • Ability to analyze investigative findings and develop fact-based reports.
  • Ability to identify and articulate improvement opportunities while driving lessons-learned activities.
  • Demonstrated integrity and judgment in a professional environment.
  • Ability to manage ambiguity and make sound judgments in stressful environments.
  • Talent management of direct reports with empathy and patience while developing them professionally.
  • Presentation and communication skills across written and verbal mediums.
  • Ability to work independently, build relationships across cultures, and manage customer and stakeholder interactions.
  • Strong organizational, teaming, management, social, communication, writing, and customer service skills.
Responsibilities
  • Independently coordinate complex response efforts to global cybersecurity incidents caused by external threats, including during nontraditional working hours.
  • Serve as a liaison and relationship manager for different businesses, Information Security teams, business partners, management, vendors, and external parties.
  • Establish, foster, and maintain relationships with General Counsel, Data Privacy and Protection, and Risk Management contacts.
  • Drive integration with corporate incident management programs to ensure consistency and alignment with peer support teams within Information Technology.
  • Oversee critical Cyber and Investigative Services projects as directed by leadership.
  • Serve as a counselor and manager for junior members of the Cyber Incident Response team.
  • Lead process and documentation development and improvements for the Cyber and Investigative Services team.
  • Develop and document processes for consistent and scalable response operations and continuous improvement of the global cybersecurity incident response plan.
  • Develop and deliver metrics to leadership regarding operational improvement of the cybersecurity incident response process.
  • Report on team performance and deficiencies, identify improvement areas, and institute corrective or enhancement programs.
  • Draft communications and provide timely reports and updates to leadership for assigned cases and cases of direct reports during and after incidents.
  • Own or oversee processes and corresponding documentation.
  • Participate in an off-hours on-call rotation.
Desired Qualifications
  • Willingness to pursue related professional certifications such as GCFE, GCFA, GCIH, CISA, CISM, CISSP, or CCIM.

About the company

EY is a global professional services firm that offers consulting, assurance (audits), tax, and transaction advisory services to a wide range of clients including corporations, SMEs, and government entities. It earns fees for these services and uses its industry expertise and a worldwide network to help clients optimize operations, manage risk, and achieve sustainable growth. EY differentiates itself through its scale and reach, industry specialization, focus on end-to-end services, strategic alliances, and emphasis on innovation and sustainability, including improving audit quality and addressing digital economy needs and supply chain visibility. The company’s goal is to help clients navigate complex regulatory and business environments, transform finance and tax functions, and drive efficiency and resilience across their operations.

Company Size

1,001-5,000

Company Stage

N/A

Total Funding

N/A

Headquarters

London, United Kingdom

Founded

1991

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Simplify's Take

What believers are saying

  • EY reported AI-related revenue growth of 30% year-over-year in 2025.
  • EY's AI router cut internal token costs by 60% since April 2026.
  • EY opened Bengaluru's ey.ai Centre for Reimagination to sell enterprise AI transformation.

What critics are saying

  • EY set aside £188 million for UK fines and legal claims in 2025.
  • FRC fined EY for Made.com audit failures; NMC Health litigation still haunts audits.
  • Australia is reviewing EY misconduct complaints after the PM bank-account breach scandal.

What makes Ernst & Young unique

  • EY and Microsoft invested over $1 billion in May 2026 AI delivery.
  • EY serves audit, tax, consulting, and transactions across 400,000 employees worldwide.
  • EY wins massive public-sector training work, including the £137 million UK civil-service contract.

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Benefits

Professional Development Budget

Flexible Work Hours

Remote Work Options

Company News

PR Newswire
Sep 9th, 2026
US oil producers hit record output as capital spending drops 49% and reserve replacement falls

An Ernst & Young study found US oil and gas producers reached record production in 2025 while becoming more selective with investments. The analysis of 30 major exploration and production companies, representing 43% of US oil and gas output, showed oil production hit a study-period high, yet reserve additions from extensions and discoveries declined 11% year over year and failed to fully replace production volumes for the first time since 2021. Total capital expenditures fell 49% year over year, whilst M&A spending declined 70%. Exploration spending dropped 11% to $4.8 billion, representing only 3% of total capital expenditures. Natural gas showed stronger fundamentals, with production rising 18%, reserves increasing 14%, and discoveries up 21%.

Yahoo Finance
Aug 31st, 2026
EY commits $100M to bonuses rewarding human skills alongside AI adoption

Ernst & Young's US division is allocating $100 million this fiscal year to bonus payments rewarding employees who demonstrate adaptability, innovation, and judgement. Individual spot awards reach $500, whilst employees or teams making significant contributions can receive between $10,000 and $25,000, five times the previous programme's ceiling. The initiative also covers AI experimentation. "What we recognise signals what we value," said Ginnie Carlier, chief talent and culture officer for EY Americas. The bonuses form part of a broader strategy to reshape employee development across all career levels. Other professional services firms are pursuing similar approaches. KPMG restructured its audit internship this summer to emphasise critical thinking, whilst PwC US introduced training combining AI proficiency with human qualities like empathy. EY reported AI-related revenue grew 30% year-over-year in 2025.

Consultancy.eu
Aug 28th, 2026
EY-Parthenon acquires Dutch digital strategy consultancy SparkOptimus

EY-Parthenon has acquired SparkOptimus, a Dutch digital strategy consultancy founded in 2010. The Amsterdam-based firm employs around 50 consultants and specialises in AI transformation, digital business model redesign and technology-driven transformation. SparkOptimus founders Alexandra Jankovich and Tom Voskes, both former McKinsey consultants, said joining EY-Parthenon will create significant value for clients and staff whilst providing access to broader capabilities. The acquisition marks EY-Parthenon's first European deal since 2021. EY-Parthenon, established in 2014, is EY's strategy consulting and transactions advisory business with around 25,000 professionals globally. Mark Reich, Partner at EY-Parthenon Netherlands, said SparkOptimus' expertise will complement existing capabilities in the Dutch market. The deal closes on 1 September 2026. Financial terms were not disclosed.

Yahoo Finance
Aug 18th, 2026
KPMG and EY win $579M UK civil servants training contract despite consultancy spending pledge

The UK Government has awarded a contract worth up to £456 million to KPMG and EY to train civil servants, the Financial Times reported, citing government procurement tracker Tussell. Under the arrangement, the firms will train officials across various skills areas, including AI, between 2026 and 2028. KPMG's share is capped at £319 million, representing almost a quarter of its total UK advisory net sales from last year. EY's portion is worth £137 million, equivalent to around 13% of its UK consulting revenue. The deal is the largest single contract awarded to Big Four companies since Tussell started tracking records in 2012. The previous record was a £322 million deal between the Foreign Office and PricewaterhouseCoopers in 2012.

Business Insider
Jul 30th, 2026
EY's 'invisible' AI router cuts token costs by 60% by directing queries to cheaper models

EY has introduced an "invisible" AI router to manage internal AI spending, helping cut token consumption by up to 60% since its April rollout. The router sits behind specialised AI tools and directs employee queries to the most appropriate model for each task, rather than defaulting to the most powerful option. Token costs have become a growing concern as AI providers increasingly charge based on usage. EY's AI Pulse survey found that 82% of senior leaders at companies investing in AI were worried about token usage. The router has been deployed on department-specific platforms, including tax and risk functions, though not on the general Microsoft Copilot chatbot available to all staff. EY has also implemented token budgets based on employees' roles and departments. The firm's global consulting AI leader Dan Diasio said companies should focus AI investment on areas with the deepest impact rather than spreading resources thinly.