Overview We are seeking an IT Infrastructure & Security Specialist to join our IT Operations team. This role combines cloud infrastructure management, cybersecurity operations, networking, and L1/L2 technical support . The ideal candidate has strong experience managing Microsoft 365, Azure, AWS infrastructure, networking, and enterprise systems , while also supporting internal users and maintaining secure, reliable IT operations in a fast-growing organization. The role also plays an important part in maintaining Frontier’s security posture , including security tooling, monitoring, and internal security awareness initiatives. Key Responsibilities Infrastructure & Cloud Operations Administer and maintain Microsoft 365 services including Entra ID (Azure AD), Exchange Online, SharePoint, endpoint management, and security configurations. Support and maintain Azure and AWS cloud infrastructure , including virtual networks, access controls, system monitoring, and connectivity. Manage VPN connectivity, networking infrastructure, firewalls, and virtual networks to ensure secure and reliable connectivity across systems and users. Maintain and support SFTP servers and secure file transfer processes used for business integrations. Assist with maintenance, monitoring, and troubleshooting SQL databases supporting internal applications and integrations. Administer and support VoIP and cloud telephony platforms (such as RingCentral) , including user provisioning, call routing, integrations, and troubleshooting. Cybersecurity Administer and monitor Microsoft Defender and other enterprise security platforms used for endpoint, identity, and email protection. Investigate security alerts, assist with incident response, and support vulnerability remediation and access management practices including MFA enforcement. Help maintain Frontier’s overall security posture through monitoring, policy enforcement, and collaboration with leadership on security initiatives. Lead internal security awareness initiatives , including employee security training programs and simulated phishing campaigns. Coordinate with external security vendors to conduct periodic penetration testing and vulnerability assessments, including managing testing scope, scheduling, remediation tracking, and follow-up verification. IT Support & Business Systems Provide L1–L2 technical support for employees across the organization, troubleshooting issues related to Microsoft 365, ERP, networking, and SaaS platforms. Manage user provisioning, permissions, device setup, and access controls across enterprise systems. Collaborate with internal teams to resolve system issues, improve reliability, and document processes and solutions. Required Qualifications 5–7+ years of experience in IT infrastructure, systems administration, or similar roles. Hands-on experience administering Microsoft 365 environments , including identity and security management. Experience managing Azure and AWS cloud infrastructure . Strong knowledge of networking, VPNs, firewalls, and virtual networks. Experience supporting IT Helpdesk / L1-L2 support in a business environment. Experience maintaining SFTP servers and secure file transfer processes. Experience with SQL database maintenance, backups, and troubleshooting. Experience supporting ERP systems (preferably Acumatica) and other SaaS business applications. Experience administering Microsoft Defender or comparable enterprise security platforms . Nice to Have Experience with PowerShell or scripting for automation Experience working in e-commerce environments Experience supporting or maintaining infrastructure for chatbots, AI tools, or conversational platforms Experience supporting or maintaining data warehouse infrastructure and data pipelines #J-18808-Ljbffr