IT System Engineer - Tier III 5463

Tier4 Group; Atlanta (GA); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Tier4 Group in the Atlanta metro area seeks a Senior Systems Engineer to enhance enterprise IT across Microsoft 365, identity management, endpoints, networking, and infrastructure. This hybrid role requires 3–4 days in the Marietta office as part of a collaborative IT team.

You will mentor teammates, resolve complex issues, and help drive a stable, secure, and scalable technology environment in partnership with IT, Security, and Infrastructure teams.

Qualifications

• 5+ years of progressive experience in IT engineering, systems administration, infrastructure support, or a related technical role.
• Strong experience supporting Microsoft-based enterprise environments.
• Hands-on experience with Microsoft 365 Administration, Active Directory and Entra ID, Intune and/or SCCM, Windows desktop and server administration, and enterprise networking fundamentals.

Responsibilities

• Serve as the senior escalation point for complex technical issues spanning endpoints, identity, infrastructure, networking, and enterprise applications.
• Perform root cause analysis and resolve issues that require advanced troubleshooting across Microsoft and enterprise technology platforms.
• Manage high-priority incidents and escalations while ensuring clear communication with stakeholders and end users.
• Administer and support Microsoft 365, Active Directory, and Entra ID environments, including identity, access, and authentication services.
• Support endpoint management platforms, including device provisioning, patch management, compliance enforcement, and configuration management.
• Troubleshoot connectivity issues involving LAN/WAN environments, VPNs, wireless networks, and remote users.
• Create and maintain technical documentation, knowledge articles, and runbooks to improve support effectiveness.
• Participate in on-call support rotations for critical business-impacting incidents.

Skills

IT engineering

Systems administration

Infrastructure support

Strong communication

Mentoring

Troubleshooting

Documentation

PowerShell scripting

Problem solving

Education

Microsoft Certifications

CompTIA Network+ or Security+

ITIL Foundations

Tools

Microsoft 365 Admin

Active Directory / Entra ID

Intune / SCCM

Windows Server Admin

LAN/WAN Networking

Job description

Location: Marietta, GA (near the Battery / Truist Park)

Full Time

Onsite

We're partnering with a growing organization to identify a Systems Engineer who enjoys solving complex technical challenges, mentoring others, and improving the overall technology experience across the business.

This role serves as a senior technical resource supporting core enterprise technologies, including Microsoft 365, identity and access management, endpoint management, networking, and infrastructure platforms. You'll partner closely with IT, Security, and Infrastructure teams to resolve complex issues, drive operational improvements, and contribute to a stable, secure, and scalable technology environment.

This position is based in the Atlanta area and follows a hybrid schedule, with approximately 3-4 days per week in the office.

What You'll Do

Advanced Technical Support & Engineering

• Serve as the senior escalation point for complex technical issues spanning endpoints, identity, infrastructure, networking, and enterprise applications.
• Perform root cause analysis and resolve issues that require advanced troubleshooting across Microsoft and enterprise technology platforms.
• Manage high-priority incidents and escalations while ensuring clear communication with stakeholders and end users.
• Administer and support Microsoft 365, Active Directory, and Entra ID environments, including identity, access, and authentication services.
• Support endpoint management platforms, including device provisioning, patch management, compliance enforcement, and configuration management.
• Troubleshoot connectivity issues involving LAN/WAN environments, VPNs, wireless networks, and remote users.
• Create and maintain technical documentation, knowledge articles, and operational runbooks to improve support effectiveness and reduce recurring issues.
• Participate in on-call support rotations for critical business-impacting incidents.

Infrastructure & Systems Administration

• Administer and maintain enterprise systems, servers, virtual environments, and supporting infrastructure.
• Support backup, recovery, business continuity, and disaster recovery processes.
• Assist with infrastructure upgrades, patching initiatives, technology refreshes, and system implementations.
• Monitor system performance and proactively identify opportunities to improve reliability, security, and operational efficiency.
• Develop automation solutions using PowerShell and other tools to streamline routine administrative tasks and reduce manual effort.
• Provide mentorship and technical guidance to Service Desk and Systems Administration team members.
• Partner with Security, Infrastructure, and Application teams on project delivery and issue resolution.
• Identify opportunities for automation, standardization, and process improvement that enhance the end-user experience.
• Contribute to evaluating and implementing new technologies, tools, and best practices.
• Help elevate overall support maturity by improving documentation, knowledge sharing, and operational processes.

What You Bring

Required Qualifications

• 5+ years of progressive experience in IT engineering, systems administration, infrastructure support, or a related technical role.
• Strong experience supporting Microsoft-based enterprise environments.
• Hands-on experience with:
• Microsoft 365 Administration
• Active Directory and Entra ID
• Microsoft Intune and/or SCCM
• Windows desktop and server administration
• Enterprise networking fundamentals (TCP/IP, DNS, DHCP, VPN)
• PowerShell scripting and automation
• Strong analytical and troubleshooting skills with the ability to manage multiple priorities in a fast-paced environment.
• Excellent communication skills and the ability to translate technical concepts for non-technical audiences.
• Experience documenting systems, processes, and technical standards.
• Passion for mentoring others and sharing technical knowledge.
• Willingness and enthusiasm for phone support as needed.

Preferred Qualifications

• Experience working within ITIL-based support and change management environments.
• Exposure to virtualization, cloud infrastructure, and modern endpoint management practices.
• Relevant certifications such as:
• Microsoft Certifications
• CompTIA Network+ or Security+
• ITIL Foundation
• Experience supporting hybrid and remote workforce environments.

Why This Opportunity?

• Join a collaborative IT team where you'll have meaningful influence and visibility.
• Work across a broad technology stack rather than being siloed into a single discipline.
• Opportunity to mentor others and help shape technical best practices.
• Exposure to infrastructure, cloud, security, and end-user technologies.
• A role that blends hands-on engineering, problem-solving, and continuous improvement.
• Excellent suite of benefits that start day one!