L3 Systems Engineer (Senior MSP & Security Engineer)
Full TimeJob Overview
We are seeking a highly capable Level 3 Systems Engineer to serve as the senior escalation point and technical authority across a cloud-first MSP and security-focused business.
This role requires deep expertise in Microsoft 365, advanced networking, endpoint security, and automation. The ideal candidate will be technically strong, process-driven, security aware, and capable of leading projects while mentoring junior engineers.
We are seeking a highly capable Level 3 Systems Engineer to serve as the senior escalation point and technical authority across a cloud-first MSP and security-focused business.
This role requires deep expertise in Microsoft 365, advanced networking, endpoint security, and automation. The ideal candidate will be technically strong, process-driven, security aware, and capable of leading projects while mentoring junior engineers.
Duties and Responsibilities
- Act as final escalation point for complex incidents
- Handle and complete Level 1 and Level 2 tickets as needed to support service delivery
- Lead advanced Microsoft 365 troubleshooting and security configuration
- Architect and improve cloud and hybrid environments.
- Lead PowerShell automation initiatives
- Oversee RMM optimization and automation workflows
- Design and troubleshoot advanced networking configurations
- Manage and enhance endpoint security posture
- Implement and refine MFA, SSO, Conditional Access policies
- Assist with or lead migrations and infrastructure upgrades
- Ensure ITIL-aligned service delivery standards
- Mentor L1 & L2 engineers
Required Experience/Skills
- 7–10+ Years MSP Experience
Microsoft 365 (Advanced Security & Architecture)
- Advanced Exchange Online troubleshooting
- Entra ID architecture & security management
- Conditional Access policy design
- Identity & access governance
Google Workspace
- Security & compliance configuration
- Policy enforcement & tenant optimization
Endpoint & Infrastructure
- Advanced Windows Server knowledge
- macOS & Windows architecture troubleshooting
- Virtualization exposure (advantageous)
Tooling & Automation
- NinjaRMM / Atera advanced usage
- PowerShell automation scripting (advanced)
- Bash scripting (advantageous)
- High-level documentation governance
- Process improvement initiatives
Networking & Security
- Advanced firewall configuration
- VPN architecture troubleshooting
- VLAN design & segmentation
- Wi-Fi optimization & diagnostics
- Strong EDR/MDR management
- Direct Huntress and/or Field Effect experience (Highly Preferred)
- SOC/SIEM exposure (advantageous)
Process & Leadership
- Full ownership of complex technical issues
- Escalation management
- Project leadership (system upgrades, migrations)
- ITIL-aligned change management execution
- Root cause analysis & problem management
Communication & Cultural Requirements
- Fluent English (mandatory)
- Clear, professional verbal communication (minimal accent requirement)
- Strong written documentation capability
- Ability to translate complex issues into business-friendly explanations
- Leadership presence and mentorship capability