Senior Systems Engineer - Tier 3

Accu-Staff Resource Systems Enterprises Ltd.; London; On-site; CAD 80,000 - 90,000; Full time

Benefits offered by this job

Health and dental benefits

Paid time off

Professional development support

Exposure to enterprise technologies

Job summary

ACCU-STAFF Resource Systems Enterprises Ltd. is seeking a Senior Systems Engineer to join a growing technology team supporting complex client environments in Ontario. You will design, implement and migrate infrastructure solutions, and act as senior escalation point.

You will lead projects, provide Tier 3 support, and administer VMware/Hyper-V, Windows Server, Active Directory, and Azure/Entra ID, with strong MS 365/Exchange expertise and robust documentation skills.

Qualifications

• 7+ years of progressive systems/infrastructure experience preferred.
• Strong hands-on experience with VMware and/or Hyper‑V.
• Advanced knowledge of Microsoft enterprise technologies.
• Experience with M365, Exchange, Windows Server and Active Directory.
• Strong troubleshooting and root-cause analysis skills.
• Experience implementing infrastructure solutions and managing technical projects.
• Knowledge of storage, backup and disaster recovery.
• Excellent client-facing communication and documentation skills.

Responsibilities

• Design, implement and support Microsoft and hybrid infrastructure environments.
• Lead infrastructure projects from design through implementation and handover.
• Provide Tier 3 troubleshooting and escalation support.
• Deploy and support VMware and Hyper‑V environments.
• Administer Windows Server, Active Directory, Group Policy and Azure/Entra ID.
• Support Microsoft 365, Exchange Online and SharePoint.
• Implement and support RDS/Terminal Services, VPN and remote-access solutions.
• Work with SAN/NAS, storage, backup and disaster recovery solutions.
• Troubleshoot LAN/WAN, firewalls, security and connectivity.
• Review client environments and recommend improvements to performance, security and resiliency.
• Develop technical documentation and implementation plans.
• Participate in an after-hours/on-call rotation.

Skills

VMware

Hyper‑V

Microsoft enterprise tech

Active Directory

PowerShell

M365/Exchange

Documentation

Client-facing

Tools

PowerShell

LogicMonitor

NinjaOne

Power BI

Job description

Are you the person other IT professionals turn to when they can't solve the problem?

We're looking for an experienced Senior Systems Engineer to join a growing technology team supporting complex client environments.

We're hiring across two areas:

Projects & Solutions – designing, implementing and migrating infrastructure solutions.

Tier 3 Infrastructure & Escalations – solving complex technical issues and acting as the senior escalation point for critical client environments.

If you're strongest in one area but experienced across both, we'd like to hear from you.

What You'll Do

• Design, implement and support Microsoft and hybrid infrastructure environments
• Lead infrastructure projects from design through implementation and handover
• Provide Tier 3 troubleshooting and escalation support
• Deploy and support VMware and Hyper‑V environments
• Administer Windows Server, Active Directory, Group Policy and Azure/Entra ID
• Support Microsoft 365, Exchange Online and SharePoint
• Implement and support RDS/Terminal Services, VPN and remote‑access solutions
• Work with SAN/NAS, storage, backup and disaster recovery solutions
• Troubleshoot LAN/WAN, firewalls, security and connectivity
• Review client environments and recommend improvements to performance, security and resiliency
• Develop technical documentation and implementation plans
• Participate in an after‑hours/on‑call rotation

Pay: CA$80,000.00-CA$90,000.00 per year

What We're Looking For

• 7+ years of progressive systems/infrastructure experience preferred
• Strong hands‑on experience with VMware and/or Hyper‑V
• Advanced knowledge of Microsoft enterprise technologies
• Experience with M365, Exchange, Windows Server and Active Directory
• Strong troubleshooting and root‑cause analysis skills
• Experience implementing infrastructure solutions and managing technical projects
• Knowledge of storage, backup and disaster recovery
• Excellent client‑facing communication and documentation skills
• Ability to work independently and take ownership of complex technical challenges

Experience with SQL Server, Linux, PowerShell, Cisco Duo, LogicMonitor, NinjaOne, Power BI or Power Automate is considered an asset.

Company Overview: ACCU-STAFF, our mission is to help organizations find the top Industry talent and to help people achieve their personal and professional goals through the growth of their careers. Our core values are the backbone of our business, which is how we guide our hiring process: we show excellence through results, lead with integrity and accountability, and exemplify competitive greatness.

We are honoured to be ranked among the Top 50 staffing and recruitment firms in Canada, out of nearly 30,000 firms nationwide.

Forbes has recognized us as one of the Best in Canada across all three major categories:

• Best Executive Recruitment Firms
• Best Temporary Staffing Firms
• Best Professional Recruiting Firms

Microsoft, Cisco, VMware, Citrix, Linux or other relevant technical certifications are also valued.

Why Join?

• Competitive compensation
• Health and dental benefits
• Paid time off
• Professional development and certification support
• Exposure to diverse enterprise technologies and client environments
• Opportunity to work on challenging projects and continue expanding your technical expertise

Interested?

If you're a senior infrastructure professional who enjoys building solutions, solving complex problems and being the technical expert others rely on, we'd like to hear from you.

ACCU-STAFF has an accommodation process in place and provides accommodations for employees with disabilities. If you require a specific accommodation because of a disability or a medical need, please contact Human Resources so that arrangements can be made for the appropriate accommodations to be in place before you begin your employment. We thank all applicants for their interest; however only those selected for an interview will be notified