Tier 3 Engineer - Systems Integrator

Hamilton Barnes Associates Limited; Wisconsin; Hybrid; USD 100,000 - 140,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Company-paid life insurance

Disability coverage

401(k) with company match

Paid time off and holidays

On-call differential

Hybrid or fully remote flexibility

Job summary

Hamilton Barnes Associates Limited is seeking a senior engineer to serve as the final escalation point across multi-client MSP environments, focusing on complex infrastructure, cloud, networking, and security issues. The role emphasizes root-cause analysis, technical standards, and high-impact problem resolution.

The position offers growth opportunities, hybrid or fully remote options, and a salary range of $100,000–$140,000 based on experience.

Qualifications

• 5+ years in MSP, IT consulting, or multi-client environments.
• 2+ years at senior/escalation-level responsibility.
• Expert Windows Server and Active Directory expertise.
• PowerShell administration and automation experience.

Responsibilities

• Serve as the final escalation point for complex incidents.
• Perform root-cause analysis and eliminate recurring issues.
• Lead technical response during major outages and security incidents.
• Develop documentation, runbooks, and standard operating procedures.
• Mentor Tier 1 and Tier 2 engineers.

Skills

MSP experience

Escalation leadership

PowerShell automation

Automation scripting

Documentation

Communication

Tools

RMM scripting

Azure

Job description

Looking for a role with plenty of growth opportunities?

Join a growing managed services provider delivering practical, cost-effective IT solutions and reliable support to help businesses manage their technology needs as they grow. The organisation focuses on building long-term partnerships through expert guidance and dependable IT services.

The role offers the opportunity to join as a senior-level engineer and act as the final technical escalation point for complex infrastructure, cloud, networking, and security issues across multiple client environments. You’ll focus on solving high-impact technical problems, identifying root causes, and establishing technical standards across managed environments.

Responsibilities

• Serve as the final escalation point for complex incidents.
• Perform root-cause analysis and eliminate recurring issues.
• Lead technical response during major outages and security incidents.
• Develop and maintain infrastructure and security standards.
• Design and maintain Microsoft 365 and Entra ID environments.
• Manage Windows Server, Active Directory, Group Policy, DNS/DHCP, and certificates.
• Design and maintain Azure infrastructure and cloud services.
• Configure firewalls, switching, routing, VPN, wireless, and SD-WAN/SASE environments.
• Manage virtualization, backup, disaster recovery, and restore testing.
• Support security assessments and compliance requirements.
• Review architecture, scope, and technical designs for projects.
• Lead select high-complexity infrastructure implementations.
• Ensure projects transition successfully into managed services.
• Mentor Tier 1 and Tier 2 engineers.
• Develop documentation, runbooks, and standard operating procedures.
• Automate recurring tasks using PowerShell and RMM scripting.
• Improve monitoring, alerting, and proactive remediation.
• Contribute to technical hiring and candidate assessments.

Skills/Must have

• 5+ years in MSP, IT consulting, or multi-client environments.
• 2+ years at senior/escalation-level responsibility.
• Expert Windows Server and Active Directory expertise.
• Strong Group Policy, DNS/DHCP, and certificate services knowledge.
• Strong Microsoft 365 and Entra ID experience.
• Exchange Online, Intune, SharePoint, Teams, and Conditional Access.
• Hands-on Azure infrastructure experience.
• Strong TCP/IP, VLAN, routing, and switching knowledge.
• Business-class firewall configuration experience.
• Site-to-site and remote-access VPN experience.
• PowerShell administration and automation proficiency.
• Practical EDR/XDR and email security experience.
• MFA, patching, vulnerability management, and incident response.
• Strong troubleshooting and root-cause analysis skills.
• Excellent communication with technical and non-technical stakeholders.
• Strong documentation and PSA/RMM experience.
• Ability to manage multiple concurrent escalations.
• Valid driver's license and reliable transportation.

Benefits

• Health, dental, and vision insurance
• Company-paid life insurance
• Disability coverage
• 401(k) with company match
• Paid time off and holidays
• On-call differential
• Hybrid or fully remote flexibility

Salary

• $100,000-$140,000 Based on Experience