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Triune Infomatics Inc · 1 day ago

Cybersecurity Operations Engineer

oakland, CA

Full-time

Onsite

Mid, Senior Level

5+ years exp

Triune Infomatics Inc is seeking a mid-to-senior level Cybersecurity Operations Engineer to take ownership of core security operations and engineering functions. The role focuses on maintaining stability, reducing risk, and improving detection and response across various security tools and practices.

Business Information SystemsConsultingInformation and Communications Technology (ICT)Information ServicesInformation Technology

H1B Sponsor Likely

Responsibilities

Provide Tier 2/3 support for firewall policy administration, change control, and troubleshooting; optimize rulesets and ensure continued stability and secure configurations

Maintain and tune email security policies (anti-phishing, impersonation protection, URL/file controls); support investigations and ongoing stability of the email security platform

Manage Tenable scanning from validation to full production; ensure scan coverage, credentialed scanning where applicable, tuning to reduce noise, and actionable reporting for remediation teams

Monitor and manage CrowdStrike detections; perform triage and investigations, execute response actions, and maintain a low-noise, automation-friendly detection environment

Support Azure security monitoring and hardening initiatives, including secure configurations, identity and access best practices, logging/telemetry validation, and remediation tracking

Coordinate penetration testing activities, ensure findings are tracked to closure, validate remediations, and maintain evidence of pass/fail outcomes

Create and maintain runbooks/playbooks for common investigations, changes, and recurring operational tasks; improve repeatability and reliability

Provide limited support for GRC reporting or control evidence coordination (Hyperproof) as requested

Qualification

Network SecurityEmail Security GatewayThreat & Vulnerability ManagementEDR / Endpoint SecurityCloud Security (Azure)Pen TestingFortinetMimecastTenable.io/Tenable.scCrowdStrike FalconIncident TriageDocumentationCross-team Coordination

Required

5+ years (or equivalent) hands-on experience in security operations/engineering

Strong hands-on experience with firewall policy administration, rule lifecycle management, troubleshooting, and change control (Fortinet preferred)

Administration and tuning of email security controls (Mimecast preferred), including policy maintenance and investigation workflows

Proficiency with Tenable.io/Tenable.sc for production scan deployments, tuning, coverage management, and reporting

Experience with CrowdStrike Falcon operations—alert triage, investigation, response actions, and tuning for low-noise/high-signal outcomes

Experience with Azure security controls, monitoring, and secure configuration practices (e.g., identity, logging, network controls, posture management)

Experience coordinating internal/external penetration tests, tracking remediation, and validating fixes/closures