Sr. Information Security Engineer

Glidewell Laboratories; Irvine (CA); On-site; USD 145,000 - 173,000; Full time

Job summary

Glidewell Laboratories in Irvine, CA seeks a Senior Security Engineer to configure and optimize security platforms across endpoint, network, web, email, cloud, and identity domains. You will refine detection logic and policies to improve signal quality and reduce false positives, while supporting incident response across multiple platforms.

The role requires extensive experience in information security, with preferred expertise in zScaler or Darktrace and a strong background in implementing NDR,

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, Information Technology, or related field.
• Minimum eight (8) years of experience in information security, network security, infrastructure security or equivalent.
• Experience in zScaler or Darktrace preferred
• Experience with: Network detection and response (NDR); Secure web gateway / SSE platforms; Endpoint, cloud, or identity security tools

Responsibilities

• Configures, maintains, and optimizes security platforms across endpoint, network, web, email, cloud, and identity domains.
• Continuously refines policies, detection logic, and configurations to improve signal quality and visibility.
• Investigates suspicious activity using logs, traffic, and endpoint behavior.
• Performs triage and root cause analysis, escalating as needed.
• Contributes to incident response through multi-platform analysis.
• Collaborates with IT, engineering, and business teams to resolve issues efficiently.
• Develops knowledge across multiple security domains to support resiliency and continuity.

Education

Bachelor's degree in Computer Science, Computer Engineering, Information Technology, or related field

Tools

zScaler

Darktrace

NDR (Network Detection & Response)

Secure Web Gateway / SSE platforms

Endpoint security tools

Cloud security tools

Identity security tools

Job description

Essential Functions:

• Configures, maintains, and optimizes assigned security platforms across endpoint, network, web, email, cloud, and identity domains.
• Continuously refines policies, detection logic, and configurations to improve signal quality, reduce false positives, and enhance visibility.
• Applies platform capabilities to develop and improve detection coverage (e.g., IOA, behavioral detection).
• Ensures platform health, telemetry integrity, and effective coverage across environments
• Evaluates and implements enhancements to improve effectiveness of existing tools prior to recommending new solutions.
• Analyzes alerts and raw telemetry generated by security platforms and determines appropriate action based on context and risk.
• Investigates suspicious activity using available data sources, including logs, network traffic, and endpoint behavior.
• Applies independent judgment to distinguish between benign, anomalous, and malicious activity.
• Perform triage and root cause analysis, escalating when broader coordination is required.
• Contributes to incident response through multi-platform analysis and insight.
• Troubleshoots and resolves issues related to security controls, including access disruptions, false positives, and policy conflicts.
• Applies practical, risk-based decisions when adjusting controls to balance security with operational needs.
• Collaborates with IT, engineering, and business teams to diagnose and resolve issues efficiently
• Develops working knowledge across multiple security domains to support team resiliency and continuity coverage.
• Serves as a secondary resource across security platforms including endpoint, email, vulnerability, and cloud.
• Collaborates with peers to ensure continuity of coverage and reduce single points of failure
• Identifies gaps in detection, visibility, and control effectiveness based on operational experience.
• Improves detection quality, reduces noise, and enhances response effectiveness (e.g. MTTD/MTTR).
• Contributes to development of playbooks and processes, remaining effective in situations where such guidance is incomplete.
• Implements automation or scripting where appropriate to improve efficiency.
• Communicates findings, risks, and recommendations clearly to technical and non-technical stakeholders
• Translates technical observations into business-relevant impact.
• Demonstrates strong active listening and incorporates differing perspectives.
• Maintain a collaborative, solutions-oriented approach while providing clear recommendations and direction.
• Participate in on-call rotation for after-hours response.
• Respond to security incidents and production-impacting issues in a timely and structured manner.
• Communicates important security developments, escalations, and activities to appropriate management personnel.
• Serves as a mentor and provides training to other team members.
• Recommends regulatory and industry best practice framework for security operational.
• Conducts industry research on new and emerging security technologies to ensure security solutions exhibits high levels of performance.
• Collaborates with other departments to ensure security is embedded throughout organizational processes.
• Participates in technical audits to ensure compliance with security policies and other industry standards.
• Participates in the creation and maintenance of security documents.
• Performs other related duties and projects as business needs require at direction of management.

Education and Experience:

• Bachelor's degree in Computer Science, Computer Engineering, Information Technology, or related field.
• Minimum eight (8) years of experience in information security network security, infrastructure security or any equivalent education and/or experience from which comparable knowledge, skills and abilities have been demonstrated/achieved.
• Experience in zScaler or Darktrace preferred
• Experience with security platforms such as the following, required:
  • Network detection and response (NDR)
  • Secure web gateway / SSE platforms
  • Endpoint, cloud, or identity security tools

Pay Range: $145,000.00 - $173,000.00/yr