Senior IT Systems Engineer

Horizon3.ai

. Administer and secure Okta or an equivalent identity/SSO provider, including authentication policies, access provisioning, and downstream application integrations .

Posted 9/29/2026full-timeRemote • United StatesSenior💰 $142,000 - $162,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in administering and securing identity/SSO platforms like Okta, managing email security configurations, and maintaining enterprise network infrastructure. Proficient in incident response, project management, and supporting a distributed workforce.

Highest-signal resume keywords

Okta AdministrationEmail Security ConfigurationNetwork Infrastructure ManagementIncident ResponseProject Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Identity/SSO AdministrationEmail Security GatewaysSPF ConfigurationDKIM ConfigurationDMARC ConfigurationFirewall Policy ManagementNetwork SegmentationRouting TechnologiesSwitching TechnologiesVPN Architecture

Soft Skills

CollaborationProblem-SolvingCustomer SatisfactionProcess Improvement

Tools & Technologies

Google WorkspaceMicrosoft 365Palo Alto FirewallsFortinet FirewallsNetwork Monitoring ToolsProofpointMimecast

Certifications & Qualifications

Security+CCNACCNPOkta Certifications

Industry Keywords

Identity SecurityEmail SecurityNetwork SecuritySASEZero Trust ArchitectureCybersecuritySaaS

Tech Stack

Tools & technologies

CloudCyber SecurityFirewallsPythonSwitching

About the role

Key responsibilities & impact

Administer and secure Okta or an equivalent identity/SSO provider, including authentication policies, access provisioning, and downstream application integrations
Architect, administer, and secure the company email and collaboration platform
Configure mail flow rules, spam/phishing filtering, DKIM, DMARC, SPF, and data loss prevention policies
Own operations, monitoring, and incident response for network, email, and identity security controls
Manage firewall policy and threat detection
Triage incidents and remediate or escalate them according to incident response procedures
Collaborate with Security and Help Desk teams to resolve escalated connectivity issues
Support employee onboarding and offboarding
Evaluate and recommend improvements to identity architecture, email security posture, and related tooling
Administer and maintain switches, routers, firewalls, and wireless access points
Support a distributed workforce through capacity planning and performance monitoring
Design and implement VLAN, routing, and firewall rule changes with minimal business disruption
Maintain accurate documentation of network topology, configurations, and email/identity security architecture
Manage vendor relationships and support contracts for network, firewall, identity, and email security tooling
Demonstrate commitment to integrity, process improvement, and customer satisfaction

Requirements

What you’ll need

3–5 years of experience in systems administration, identity/security engineering, or network administration
Hands-on production experience administering an identity/SSO platform such as Okta, including access policies and application integrations
Experience configuring and maintaining SPF, DKIM, DMARC, anti-phishing, and anti-spam controls
Experience administering a cloud email/collaboration platform such as Google Workspace or Microsoft 365
Hands-on production experience administering enterprise network infrastructure, including switches, routers, firewalls, and VPN
Working knowledge of network segmentation, firewall policy management, and VPN architecture
Experience troubleshooting complex network, identity, and email connectivity issues with minimal escalation
Experience documenting configurations, architecture diagrams, and operational runbooks
Ability to scope and manage moderately complex projects end-to-end with little to no direction
Experience supporting a distributed or remote-first workforce
Experience with identity/SSO platforms such as Okta
Experience with email security gateways or anti-phishing tooling such as Proofpoint or Mimecast
Experience with Google Workspace, Microsoft 365, or similar platforms
Experience with enterprise firewalls such as Palo Alto or Fortinet
Experience with routing and switching technologies such as Cisco or Meraki
Experience with network monitoring tools
Relevant certifications such as Security+, CCNA, CCNP, or Okta certifications are advantageous
Experience with SASE/SSE platforms or Zero Trust network architecture is advantageous
Experience automating identity, network, or email security tasks using Python, PowerShell, or similar is advantageous
Experience in high-growth SaaS or cybersecurity companies is advantageous
Must be legally authorized to work in the United States; employment visa sponsorship may be required to disclose

Benefits

Comp & perks

Equity package in the form of stock options for all full-time roles
Health, vision, and dental insurance for you and your family
Flexible vacation policy
Generous parental leave
Career development opportunities
Inclusive and collaborative culture
Remote and hybrid work models depending on role and location
Up to 15% travel may be required