Senior Security Engineer in Houston

iSphere is looking for a Senior Security Engineer who enjoys building security solutions, improving security posture, and occasionally explaining to people why "we've always done it this way" isn't actually a security strategy.

This is a hands-on engineering role supporting a mid-sized enterprise environment. The team needs someone who can move comfortably between , endpoint, network, application, and infrastructure security while helping design and implement security controls that actually work in production environments.

This is not a security analyst position. This is for someone who likes building, configuring, integrating, hardening, automating, troubleshooting, and improving security technologies across the enterprise.

You'll work closely with infrastructure, networking, development, and operations teams to strengthen security controls, support ongoing initiatives, and help drive continuous improvement across the security program.

• Strong Microsoft security engineering experience including Entra ID, Defender XDR, Intune, and Purview
• Experience implementing and supporting Privileged Management (PIM)
• Hands-on CyberArk engineering experience including vault architecture, onboarding, session management, integrations, and high availability
• Experience designing and supporting enterprise PKI environments and certificate lifecycle management
• Strong experience with F5 BIG-IP LTM and Advanced WAF technologies
• Experience with Cisco Secure Access and enterprise network security architectures
• Strong Active Directory and Windows infrastructure security background
• Knowledge of authentication, , and access management technologies
• VMware infrastructure experience
• Experience with threat hunting, incident response, root cause analysis, and remediation efforts
• Understanding of application security, API security, authentication, authorization, and secure development practices

Experience with NIST, ISO 27002, enterprise security controls, and governance frameworks is also highly valuable.

This role will spend time engineering new capabilities, improving existing controls, supporting security operations, and helping ensure security is built into infrastructure and applications instead of bolted on afterward when everybody suddenly discovers a problem.

The right person for this role is naturally curious, technically deep, and comfortable getting pulled into everything from certificate issues and problems to network security architecture and incident investigations. Somebody who can troubleshoot complex issues, explain solutions clearly, and isn't afraid to ask, "Why are we doing it this way?" when the answer matters.

If you've spent your career working across multiple security disciplines and enjoy being the person people call when the problem is bigger than a single tool, this one is worth a look.