Network Security II Engineer III

Senior Network Security Engineer

Join a high-performance culture that drives innovation and excellence at Vertiv, we don't just hire talent - we cultivate leaders who drive innovation and engage teams to push the limits of what's possible. As a global leader in critical digital infrastructure, we are scaling up to meet the demands of AI, data centers, and next-gen technology—and we need bold, high-performing individuals like YOU to take us to the next level.

Why Vertiv?

• High-Performance Culture: We empower you to think big, execute with excellence, and deliver impact. Our performance-driven mindset rewards those who challenge the status quo and drive meaningful change. Over 50 CEO Awards are given annually to recognize top talent moving the needle forward.
• Leadership Without Limits: Leadership at Vertiv goes beyond just titles—it's about accountability, trust, and ownership. Our leaders engage and drive with collaboration, innovation, and customer-centric thinking, setting the foundation for an action-focused culture.
• Limitless Growth & Learning: We believe in continuous development. Whether through rotational programs or high-impact projects, you'll have the opportunity to expand your expertise and grow your career.
• A Place for Everyone: Our commitment to inclusion ensures that all employee's unique strengths and perspectives are valued. Your voice matters, your growth is prioritized, and your success is celebrated.

Role Summary

We're seeking a Senior Network Security Engineer to enhance our global security posture, focusing mainly on Palo Alto, Zscaler, WAF, IoT/OT security, and zero-trust architecture. You will design and deploy network security controls across standalone and hybrid environments, safeguard critical web applications with WAF, implement IoT/OT security measures in a manufacturing setting, and lead teams in developing secure, scalable solutions within an agile framework.

Key Responsibilities

• Design and implement network security architectures using Palo Alto Next-Generation Firewalls (NGFWs) and Zscaler (ZIA/ZPA) across on-premises, cloud, and remote settings.
• Lead the development and enforcement of zero-trust principles, including identity-aware policies, network segmentation, and least-privilege access.
• Configure and maintain Palo Alto firewalls and Panorama, managing policies, NAT, VPNs, SSL decryption, GlobalProtect, and logging functionalities.
• Deploy and oversee Zscaler services, integrating traffic forwarding methods, security policies, and identity provider (IdP) connections.
• Design, implement, and fine-tune Web Application Firewalls (WAF) to safeguard against the OWASP Top 10 threats and sophisticated web-based attacks.
• Develop and enforce IoT and operational technology (OT) security controls tailored for manufacturing plants.
• Resolve complex network security issues and monitor security controls and applications through log analysis, packet captures, and traffic flow examination.
• Utilize your expertise in switching and routing, including VLANs, BGP, and OSPF, to ensure secure and reliable connectivity.
• Work collaboratively with agile teams, contributing to sprint planning, refining user stories, and iteratively delivering security features.
• Follow change control processes that involve conducting risk assessments, documenting changes, and validating implementation post-execution.
• Create clear technical documentation, set standards and runbooks, and provide mentorship to junior engineers as needed.

Required Qualifications

A Bachelor of Science degree in Information Technology, Cybersecurity, Computer Science, or a closely related field.

Experience & Skills

• Extensive hands-on experience (ideally 5+ years) in network security engineering within medium to large organizations.
• Proven expertise in managing Palo Alto firewalls, preferably using Panorama in a production environment.
• Practical experience in deploying and managing Zscaler solutions (ZIA/ZPA/ZDX or similar).
• A deep understanding of zero-trust principles and how to apply them effectively in real-world scenarios.
• Solid background in architecting, implementing, and troubleshooting Web Application Firewalls (WAF).
• Demonstrated proficiency in designing and deploying security frameworks for Internet of Things (IoT) and Operational Technology (OT) environments.
• Strong knowledge of network switching and routing, covering Layer 2/Layer 3 fundamentals, along with experience in at least one major routing protocol.
• Comfortable working in an agile project management environment Scrum preferred.
• Excellent troubleshooting skills coupled with strong communication and documentation capabilities.

Certifications

At least one of the following certifications is required:

• PCNSE, PCNSA, ZDTA, ZDTE, or ZDXA
• CCNA
• CISSP

Nice to Have

• Experience with major cloud platforms like AWS, Azure, or GCP.
• Familiarity with SIEM/SOAR integrations and analysis.

The successful candidate will embrace Vertiv's Core Principals & Behaviors to help execute our Strategic Priorities.

OUR CORE PRINCIPALS: Safety. Integrity. Respect. Teamwork. Diversity & Inclusion.

OUR STRATEGIC PRIORITIES

• Customer Focus
• Operational Excellence
• High-Performance Culture
• Innovation
• Financial Strength

OUR BEHAVIORS

• Own It
• Act With Urgency
• Foster a Customer-First Mindset
• Think Big and Execute
• Lead by Example
• Drive Continuous Improvement
• Learn and Seek Out Development
• Transparent and Open Communication

About the Team

Work Authorization No calls or agencies please. Vertiv will only employ those who are legally authorized to work in the United States. This is not a position for which sponsorship will be provided. Individuals with temporary visas such as E, F-1, H-1, H-2, L, B, J, or TN or who need sponsorship for work authorization now or in the future, are not eligible for hire. Equal Opportunity Employer We promote equal opportunities for all with respect to hiring, terms of employment, mobility, training, compensation, and occupational health, without discrimination as to age, race, color, religion, creed, sex, pregnancy status (including childbirth, breastfeeding, or related medical conditions), marital status, sexual orientation, gender identity / expression (including transgender status or sexual stereotypes), genetic information, citizenship status, national origin, protected veteran status, political affiliation, or disability.

Job Info

• Job Identification 20269765
• Job Category IT Security
• Posting Date 04/24/2026, 01:52 AM
• Locations Mandaluyong City, Philippines