Staff Vulnerability Engineer / ACAS Lead (Air-Gapped IL6)

Confirmed live in the last 24 hours

Zscaler

Crystal City, Virginia, USA

Hybrid

Posted April 3, 2026

Job Description

About Zscaler

Zscaler accelerates digital transformation to ensure our customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise, we are constantly pushing the envelope, leveraging the world’s largest security data lake to power our cloud-native Zero Trust Exchange platform. This innovation protects our customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location.

Here, impact in your role matters more than title and trust is built on results. We say, impact over activity. We seek innovators who actively use AI to amplify their impact and who thrive in an environment where we leverage intelligent systems to stay ahead of evolving threats. We believe in transparency and value constructive, honest debate—we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession, collaboration, ownership, and accountability.

We value high-impact, high-accountability with a sense of urgency where you’re enabled to do your best work and embrace your potential. If you’re driven by purpose, thrive on solving complex challenges, and want to be part of the team that’s helping to secure the AI age, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity.

Role

We are looking for a Staff Vulnerability Engineer / ACAS Lead to join our Engineering team. This is a fully onsite role based near Crystal City, VA, reporting to the VP of Product Security. You will operate as the founding vulnerability management engineer inside a brand-new U.S. Federal IL6 (SCIF) environment.

This role is critical to maintaining our multitenant architecture and global security footprint. This is a rare "Zero-to-One" opportunity to build the vulnerability management engine, engineer the offline infrastructure, and establish the governance playbook from the ground up, free from legacy technical debt. You will define the end-to-end vulnerability management architecture, including platform selection, sizing, and security control implementation strategy for the new air-gapped IL6 environment. You will ensure we enable organizations worldwide to harness speed and agility while operating strictly within a U.S. SCIF and adhering to one-way diode transfer protocols.

What You’ll Do (Role Expectations)

Design and execute authenticated and unauthenticated network and host scanning using IL6-approved tools (Tenable.sc, Nessus Manager, or ACAS)
Advance the continuous security monitoring controls in the environment as autonomous and innovative systems
Oversee patch and system hardening campaigns (aligning with DISA STIGs and IAVM directives) in collaboration with IL6 service owners
Develop and deliver high-impact reports, integrating POA&M tracking and remediation status
Maintain essential documentation including runbooks, SOPs, exception governance, and change control processes within the SCIF environment

Who You Are (Success Profile)

You thrive in ambiguity. You're comfortable building the path as you walk it. You thrive in a dynamic environment, seeing ambiguity not as a hindrance, but as the raw material to build something meaningful.
You act like an owner. Your passion for the mission fuels your bias for action. You operate with integrity because you genuinely care about the outcome. True ownership involves leveraging dynamic range: the ability to navigate seamlessly between high-level strategy and hands-on execution.
You are a problem-solver. You love running towards the challenges because you are laser-focused on finding the solution, knowing that solving the hard problems delivers the biggest impact.
You are a high-trust collaborator. You are ambitious for the team, not just yourself. You embrace our challenge culture by giving and receiving ongoing feedback—knowing that candor delivered with clarity and respect is the truest form of teamwork and the fastest way to earn trust.
You are a learner. You have a true growth