Infrastructure Administrator

Trifecta; Allentown (Lehigh County); Hybrid; USD 90,000 - 130,000; Full time

Job summary

Trifecta is seeking a highly skilled Infrastructure Administrator to manage and support on‑prem and cloud infrastructure for Trifecta and clients. The role covers secure, scalable systems across physical, virtual, and cloud environments in a fast-paced, hybrid setting.

The ideal candidate has 7+ years in network or systems administration, 7+ years in Microsoft 365/Azure, and advanced networking certifications. Excellent troubleshooting and MSP experience are required.

Qualifications

• Bachelor's degree in IT/CS or related field.
• 7+ years of Network or Systems Administration experience.
• 7+ years of Microsoft 365 and/or Azure administration.
• Advanced networking certifications (CCNA, CCNP, Fortinet NSE, or equivalent).
• Experience in a Managed Services (MSP) environment.

Responsibilities

• Maintain on-prem and cloud infrastructure for Trifecta and clients.
• Monitor performance, security, and capacity across hybrid environments.
• Provide Tier 2/3 technical support.
• Collaborate with vendors and internal stakeholders.
• Perform patch management and system upgrades.
• Manage backups and disaster recovery processes.
• Configure and monitor hybrid Microsoft environments (Azure AD, Entra ID, Intune).

Skills

Network Administration

System Administration

Microsoft 365 Administration

Azure Administration

Network Certifications

Troubleshooting

Education

Bachelor's degree in Information Technology or Computer Science

Advanced networking certifications (CCNA/CCNP/Fortinet NSE)

Tools

Jira

Freshdesk

Azure AD

Intune

Entra ID

VMs

Job description

At Trifecta, we are more than just a technology company. We are a community of innovators, collaborators, and problem solvers dedicated to driving positive change in the world of technology. We are a dynamic organization that embraces diversity, fosters inclusion, and values the unique contributions of each of Trifecta Teammates. At Trifecta you will find a supportive and inclusive culture, endless opportunities for growth and development, and a vibrant community of passionate professionals dedicated to shaping the future!

About the role

We are seeking a highly motivated and detail-oriented Infrastructure Administrator to manage and support Trifecta and client on-prem and cloud-based infrastructure. This role is responsible for maintaining secure, reliable, and scalable systems across physical, virtual, and cloud environments. The ideal candidate is proactive, solutions-focused, and comfortable working in a fast-paced environment with multiple priorities. This is a hybrid role.

Key Responsibilities

Infrastructure and System Administration

• Maintain file servers, print services, and core routing services
• Provide technical administration of enterprise switches (Aruba, Fortinet, Unifi, Dell)
• Provide technical support and maintenance of campus fiber (single and multi-mode), Cat6, etc.
• Advanced knowledge of TCP/IP, SNMP, 802.11, VoIP, and PoE, DNS, DHCP, VLANs, and routing protocols (BGP, OSPF, RIP, etc.)
• Expert knowledge of SAN technologies (Dell, Synology, etc.)
• Monitor system performance, availability, and capacity
• Perform patch management and system upgrades
• Manage backups and disaster recovery processes
• Experience with backup solutions and disaster recovery
• Knowledge of network automation and scripting (PowerShell, Python, etc.)
• Familiarity with Jira or Freshdesk ticketing systems, and IT documentation platforms
• Administer Microsoft 365 (Exchange Online, SharePoint, Teams, OneDrive)
• Manage hybrid Microsoft environments (Azure AD, Entra ID, Intune, VMs, storage)
• Support hybrid hosting environments and cloud connectivity (site-to-site VPN, SD-WAN, direct connections)
• Configure and monitor cloud security and compliance controls
• Experience with Intune or similar MDM management platforms for Apple and Windows devices

Security and Compliance

• Implement CrowdStrike and ESET endpoint protection and security best practices
• Maintain DUO and Microsoft MFA, conditional access policies, and role-based access control
• Conduct regular CrowdStrike and Nessus vulnerability remediation
• Ensure systems meet internal and regulatory compliance requirements
• Knowledge of monitoring tools (Zabbix, Nagios, SolarWinds, PRTG, etc.)
• Experience with enterprise firewalls and security technologies
• Knowledge of cybersecurity frameworks and best practices

User and Operational Support

• Provide Tier 2/3 technical support
• Troubleshoot complex infrastructure and cloud-related issues
• Document systems, processes, and procedures
• Collaborate with vendors and internal stakeholders

Required Qualifications

• Primary residence within 2 hours of Allentown, PA
• Bachelor’s degree in Information Technology, Computer Science, or related field
• 7+ years of Network or Systems Administration experience
• 7+ years of Microsoft 365 and/or Azure administration
• Advanced networking certifications such as CCNA, CCNP, Fortinet NSE, or equivalent
• Experience in a Managed Services (MSP) environment
• Excellent troubleshooting and problem-solving skills