Senior Information Security Engineer

As one of the first information security engineers hired at this company, you will have the opportunity to help define its strategy and quickly move into a leadership role. This is an opportunity to make a considerable impact.

Let's get the basics out of the way first :

You must be a US Citizen or green card holder; no visa sponsorship or OPT applicants, please.

This is a hands-on Senior Cybersecurity Engineering role, not an analyst role or an opportunity for an early career professional (don't apply yet, but watch this space as those will be coming once this first phase of hiring is completed).

The role is 100% onsite in Irvine, CA. Please only apply if you live close enough to commute or are willing to move (the company will help).

You will take ownership of critical security infrastructure projects in a complex, hybrid environment. Again, This hands-on engineering role is not an analyst position focused on building, implementing, and optimizing defenses across cloud and on-prem systems.

Key Responsibilities :

• Engineer and tune security platforms, including SIEM, EDR, IDS / IPS, firewalls, and DLP
• Drive implementation of TLS encryption and implement secure email gateway infrastructure
• Develop detection logic and automate workflows using Python, PowerShell, or Bash
• Conduct forensic analysis, threat hunting, and log correlation across diverse environments
• Harden Windows, Linux, and cloud systems using industry-standard controls
• Integrate security into CI / CD and work closely with infrastructure and DevOps teams
• Lead tool evaluations, proof-of-concepts, and architecture improvements
• Provide advanced support during security incidents and mentor junior engineers

What We're Looking For :

4+ years in a hands-on commercial security engineering role

Experience implementing TLS decryption, web proxying, and email security technologies

Deep scripting and automation skills (Python, PowerShell, Bash)

Strong knowledge of tools such as Splunk, SentinelOne, CrowdStrike, IDS / IPS, and firewalls

Proven experience securing cloud and on-prem systems in complex environments

Strong problem-solving mindset and ability to work across engineering and security teams

If you're a builder who thrives on technical ownership and solving real-world security problems at scale, we’d like to connect.