Senior IT Systems Engineer
New
H
Horizon3Cybersecurity
US, RemoteFull-TimeSenior
SalaryBase salary range: $142,000 - $162,000 annually. Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.
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Job Details
- Experience
- 3–5 years of experience in systems administration, identity/security engineering, or network administration
- Required Skills
- Google Workspace
Requirements
- Have 3–5 years of experience in systems administration, identity/security engineering, or network administration.
- Have hands-on production experience administering an identity/SSO platform, including access policies and application integrations.
- Have experience configuring and maintaining email security controls, including SPF, DKIM, DMARC, and anti-phishing/anti-spam tooling.
- Have experience administering a cloud email/collaboration platform such as Google Workspace or Microsoft 365.
- Have hands-on production experience administering enterprise network infrastructure, including switches, routers, firewalls, and VPN.
- Have working knowledge of network security principles, including segmentation, firewall policy management, and VPN architecture.
- Have experience troubleshooting complex network, identity, and email connectivity issues with minimal escalation.
- Have experience documenting configurations, architecture diagrams, and operational runbooks.
- Be able to scope and manage moderately complex projects end-to-end with little to no direction.
- Have experience supporting a distributed or remote-first workforce.
- Relevant certifications such as Security+, CCNA, CCNP, or Okta certifications are listed as differentiators.
Responsibilities
- Administer Okta or an equivalent identity/SSO platform, including authentication policies, access provisioning, and downstream application integrations.
- Administer and secure the email and collaboration platform, including mail flow rules, spam and phishing filtering, SPF, DKIM, DMARC, and data loss prevention policies.
- Operate, monitor, and respond to incidents involving network, email, and identity security controls, including firewall policy and threat detection.
- Triage incidents and remediate or escalate them according to incident response procedures.
- Partner with Security and Help Desk to resolve escalated connectivity issues and support onboarding and offboarding.
- Administer and maintain switches, routers, firewalls, and wireless access points, including capacity planning and performance monitoring.
- Design and implement VLAN, routing, and firewall rule changes with minimal disruption to business operations.
- Evaluate improvements to identity architecture, email security, and related tooling.
- Document network topology, configurations, and email and identity security architecture.
- Manage vendor relationships and support contracts for network, firewall, identity, and email security tooling.
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