About UsWe are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. We're driven by a mission to stay ahead of bad actors and safeguard the digital world. Join us in our pursuit to defend data and protect people.How We WorkAt Proofpoint, you'll be part of a global team that breaks barriers to redefine cybersecurity, guided by our BRAVE core values Bold in how we dream and innovate, Responsive to feedback, challenges, and opportunities, Accountable for results and best-in-class outcomes, Visionary in future-focused problem-solving, Exceptional in execution and impact.Corporate OverviewProofpoint is a leading cybersecurity company protecting organizations' greatest assets and biggest risks vulnerabilities in people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber-attacks. Leading organizations of all sizes, including more than half of the Fortune 1000, rely on Proofpoint for people-centric security and compliance solutions mitigating their most critical risks across email, the cloud, social media, and the web.We are singularly devoted to helping our customers protect their greatest assets and biggest security risk their people. That's why we're a leader in next-generation cybersecurity. Protection Starts with People. #Proofpoint.The RoleWe are looking for a highly skilled and experienced Senior Security Engineer with a strong focus on Penetration Testing and Cloud Security Automation/DevSecOps to join our Security Engineering team.In this role, you'll lead internal penetration testing efforts and red-team style assessments of critical infrastructure and applications, enabling secure-by-default infrastructure and secure software delivery pipelines. You will also apply your expertise in scripting, infrastructure-as-code (IaC), and cloud-native security practices to improve posture, visibility, and response.Based in Cork, Ireland this key role will drive key Cloud/Data Centre security initiatives for Proofpoint Product portfolio. This is a high-impact role where you'll help define and execute both the offensive testing strategy and defensive automation roadmap. You'll be a go-to expert in uncovering vulnerabilities and building durable controls to prevent their exploitation at scale.Key ResponsibilitiesPenetration Testing & Offensive SecurityDesign and execute targeted internal red team / penetration tests across infrastructure, SaaS, APIs, and cloud environmentsPerform manual and automated testing to simulate real-world attack scenarios, including lateral movement and privilege escalationCollaborate with engineering teams to remediate findings through secure architecture and configurationPerform application security testing (black-box, grey-box, and white-box), including SAST, DAST, and manual reviewConduct red-team and purple-team exercises to simulate attacker behaviours and validate detection/resilience capabilitiesSupport the development of exploit POCs, custom tooling, and automation pipelines for recurring testing scenariosSecurity Automation & DevSecOps Architect and build scalable cloud security automation pipelines from first principles, Develop and maintain Terraform modules, CI/CD integrations, and IaC security gates, Build and operate security data pipelines to ingest and analyse scan and detection data at scaleArchitect, build, and maintain security data pipelines to ingest, normalize, and analyse telemetry at scaleLead or contribute to threat modelling, risk assessments, and security architecture reviews.What You Bring To The TeamExtensive experience in Offensive Security, DevSecOps, security engineering rolesPenetration testing experience across infrastructure, cloud services, and web applicationsFamiliarity with tools such as Burp Suite, Metasploit, Nmap, OSINT, BloodHound, Prowler, Kube-hunter, or custom scriptsSolid understanding of MITRE ATT&CK, OWASP Top 10, CWE, and cloud attack pathsThorough understanding of AWS, Azure, or GCP security models, IAM, and threat surfacesProven ability to build cloud-native security automation using Terraform (IaC), CI/CD tools and pipelines, Python/Go/BashExcellent communication and collaboration skills with the ability to drive cross-functional initiatives.Beneficial ExperienceExperience with SIEMs, SOAR, or threat intel platformsExperience with container security (e.g., Docker, Kubernetes, Falco, Trivy)Exposure to managing Network IPS/IDS systems (such as Stamus/SuricataCertifications OSCP, OSWE, OSEP, CRTO, GXPN or equivalent are a plusWhy ProofpointProtecting people is at the heart of our award-winning lineup of cybersecurity solutions, and the people who work here are the key to our success. We're a customer-focused and a driven-to-win organization with leading-edge products. We are an inclusive, diverse, multinational company that believes in culture fit, but more importantly 'culture-add', and we strongly encourage people from all walks of life to apply.We believe in hiring the best and the brightest to help cultivate our culture of collaboration and appreciation. Apply today and explore your future at ProofpointWhy Proofpoint? At Proofpoint, we believe that an exceptional career experience includes a comprehensive compensation and benefits package. Here are just a few reasons you'll love working with usCompetitive compensationComprehensive benefitsLearning & Development We are committed to the growth and development of our team members, offering a range of programs including leadership and professional development workshops, stretch project assignments, and mentoring opportunities to help employees reach their full potential.Flexible work environment (Remote options, hybrid schedules, flexible hours, etc.).Annual wellness and community outreach daysAlways on recognition for your contributionsGlobal collaboration and networking opportunitiesOur CultureOur culture is rooted in values that inspire belonging, empower purpose and drive success-every day, for everyone. We encourage applications from individuals of all backgrounds, experiences, and perspectives. If you need accommodation during the application or interview process, please reach out to How to Apply Interested? Submit your application here https We can't wait to hear from you