Network administrator jobs in Mississauga, ON and nearby

Within 25 km

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Added 3 days ago
SI
Senior Systems Administrator
STACK IT Recruitment
Toronto, ON
- $90,000 to $120,000 CAD / year
- Full-time
Are you a hands-on Systems Administrator who enjoys solving complex infrastructure problems and working across a variety of client environments?
Added 3 days ago
J
Systems Administrator/Operations Support Specialist - Senior
Joblinxsapp
Toronto, ON
- Full-time
The Systems Administrator / Operations Support Specialist will be responsible for administering, configuring, maintaining, and supporting Oracle Fusion Recruiting Cloud (ORC) and associated…
Added 3 days ago
SI
Senior Systems Administrator
STACK IT Recruitment
Toronto, ON
- $90,000 to $120,000 CAD / year
- Full-time
Are you a hands-on Systems Administrator who enjoys solving complex infrastructure problems and working across a variety of client environments?
Added 3 days ago
2I
Senior Systems Administrator/Operations Support Specialist
2iSolutions Inc.
Toronto, ON
- Contract
Our Toronto-based client is hiring a Systems Administrator/Operations Support Specialist – Senior for a 10-month onsite contract opportunity in Toronto, ON. The candidate must work onsite 5…
Added 4 days ago
GS
Senior Systems Administrator
GlassHouse Systems
Toronto, ON
- Full-time
We are looking for a Senior Systems Administrator to provide hands-on infrastructure administration and technical leadership across GlassHouse Systems' internal IT environment and Managed…
Added 4 days ago
RD
Network Administrator
Randstad Digital
Toronto, ON
- Full-time
This newly created Network Administrator position expands the core IT team to support enterprise growth and offload operational routine from senior engineering staff. The core mission is to…
Added 5 days ago
LH
SENIOR MICROSOFT SYSTEMS ADMINISTRATOR
Logic Hire Solutions LTD
Toronto, ON
- $110,000 to $160,000 CAD / year
- Full-time
🚀 SENIOR MICROSOFT SYSTEMS ADMINISTRATOR / TECHNICAL LEADToronto, ON | Hybrid (3 Days On-Site) | 7+ Years | Day-1 Impact Required⚡ THE HOOK
Added 5 days ago
SC
Network Technician
SPECBAND COMMUNICATIONS LTD
Toronto, ON
- Full-time
…technicians on demand. Services include Smart Hands and SLA support, network installations and troubleshooting, structured cabling, and fiber and copper infrastructure. SpecBand also…
Added 5 days ago
SS
IT Support and Systems Administrator - Tier 1
Securiguard Services Ltd.
Toronto, ON
- Full-time
Securiguard is seeking a detail-oriented and technically skilled IT Support & Systems Administrator (Tier 1) to join our team in Ontario. This role is responsible for providing first-level…
Added 6 days ago
Systems Administrator-GCGCON
Great Canadian Entertainment
Toronto, ON
Under the general direction of the Manager, Systems and Infrastructure, the Systems Administrator is responsible for the implementation, administration, maintenance, monitoring, and support…
Added 6 days ago
MP
Systems Administrator
Michael Page
Toronto, ON
- $40 to $50 CAD / hour
- Contract
The Systems Administrator is responsible for maintaining, supporting, and optimizing the organization's IT infrastructure to ensure reliable business operations. This role provides…
Added 6 days ago
MP
Senior Yardi System Administrator
Michael Page
Mississauga, ON
- $100,000 to $120,000 CAD / year
- Full-time
The Senior Yardi System Administrator will provide technical and business support for Chartwell's ERP applications, with a strong focus on Yardi Maintenance IQ, system administration,…
Added 6 days ago
CG
IT Systems Administrator
Canada Guaranty
Toronto, ON
- $105,000 to $115,000 CAD / year
- Full-time
The IT Systems Administrator is responsible for the daily administration, maintenance, security and reliability of Canada Guaranty’s Linux and Windows server environments and the…
Added 6 days ago
A
Network Administrator
Akkodis
Toronto, ON
- $110,000 to $114,000 CAD / year
- Full-time
We are seeking a Network Administrator (P4) to support the operation, maintenance, monitoring, and troubleshooting of enterprise network infrastructure. This role works closely with network…
Added 7 days ago
CI
System Administrator
Compugen Inc
Toronto, ON
- Full-time
The System Administrator, Server & Citrix Support is responsible for the administration, maintenance, and support of enterprise server infrastructure and Citrix environments. This role…
Added 7 days ago
P/
Network Administrator
PrecisionERP / PrecisionIT
Toronto, ON
- Full-time
CCNA certification required
Added 10 days ago
DI
System Administrator
Dawn InfoTek
Toronto, ON
- Contract
Location: Scarborough, ON (Hybrid – 3 days per week in the office) · Must Have Skills:
Added 10 days ago
Network Administrator
Cyclic Materials Inc.
Toronto, ON
As the Network Administrator, you will be responsible for the operation, security, and continuous improvement of our enterprise network infrastructure, spanning on-premises environments and…
Added 10 days ago
CM
Network Administrator
Cyclic Materials
Toronto, ON
- Full-time
As the Network Administrator, you will be responsible for the operation, security, and continuous improvement of our enterprise network infrastructure, spanning on-premises environments and…
Added 10 days ago
DI
System Administrator
Dawn InfoTek
Toronto, ON
- Contract
Location: Scarborough, ON (Hybrid – 3 days per week in the office) · Must Have Skills:
Added 11 days ago
TC
Linux System Administrator
Tata Consultancy Services
Toronto, ON
- $100,000 to $120,000 CAD / year
- Full-time
We are looking for an experienced Linux System Administrator with strong expertise in Linux infrastructure administration, automation using Ansible, and working knowledge of IBM WebSphere…
Added 11 days ago
TC
Linux System Administrator
Tata Consultancy Services
Toronto, ON
- $90,000 to $100,000 CAD / year
- Full-time
We are looking for an experienced Linux System Administrator with strong expertise in Linux infrastructure administration, automation using Ansible, and working knowledge of IBM WebSphere…
Added 11 days ago
GS
Senior Systems Administrator
Gertex Solutions
Toronto, ON
- Full-time
Manage the Ubiquiti UniFi network environment: switching, wireless, routing, and VPN - reviewing health and applying updates on a weekly to monthly cadence.
Added 11 days ago
CR
Senior System Administrator ERP (Yardi)
Chartwell Retirement Residences
Mississauga, ON
- $115,000 to $120,000 CAD / year
- Full-time
The Senior Systems Administrator, ERP is a trusted and valued resource for all Chartwell ERP end-users and possesses a superior customer service mindset. Equally important is their strict…
Added 11 days ago
SV
Senior Systems Administrator
SPIN VFX
Toronto, ON
- Full-time
…who owns provisioning and configuration tooling and a Systems Administrator who carries day-to-day fleet…

STACK IT Recruitment

Senior Systems Administrator

Toronto, ON, Canada

$90,000 to $120,000 CAD / year · Full-time

Apply on jobs.workable.com About employer

Applications open in a new tab.

Job details

Pay: $90,000 to $120,000 CAD / year
Job type: Full-time
Experience: 5+ years of experience in Systems Administration, Infrastructure Engineering, or a similar role
Posting language: English
Posted: Nov 6, 2026

Original job description

Are you a hands-on Systems Administrator who enjoys solving complex infrastructure problems and working across a variety of client environments?

We’re looking for a Senior Systems Administrator to join a growing managed IT services provider supporting clients across the Greater Toronto Area. This is a hands-on role with a strong focus on virtualization, Microsoft 365, Azure, and networking.

The ideal candidate has strong infrastructure experience, is comfortable working directly with clients, and can take ownership of technical issues from troubleshooting through to resolution.

📍 Work Type:

- Fully Onsite - 5 days a week in-office or visiting client sites; on-call and after hours support when required
- Location: Toronto, ON
- Work Type: This is a newly created position

🎯 What You’ll Do:

Manage and troubleshoot virtualized infrastructure, including Nutanix HCI environments
Administer and support Microsoft 365 environments, including Exchange Online, SharePoint, Teams, OneDrive, and user/license management
Support Azure and Entra ID environments, including hybrid identity and cloud infrastructure
Configure, maintain, and troubleshoot network infrastructure, including LAN/WAN, VLANs, firewalls, VPNs, and Wi-Fi
Serve as a senior escalation point for complex technical issues and Level 1/2 tickets
Support server, endpoint, operating system, and infrastructure-related issues across client environments
Lead and support infrastructure projects, including migrations, upgrades, and implementations
Monitor system health and proactively identify and resolve potential issues
Maintain accurate technical documentation, network diagrams, and infrastructure standards
Work directly with clients and vendors to resolve technical issues and deliver solutions
Provide technical guidance and mentorship to junior technicians
Apply security best practices across client systems and infrastructure

⭐ What We’re Looking For:

5+ years of experience in Systems Administration, Infrastructure Engineering, or a similar role
Experience working within an MSP, managed services, or multi-client environment
Hands-on experience administering Nutanix HCI, including cluster management and AHV/VM administration
Strong experience administering Microsoft 365, including Exchange Online, SharePoint, Teams, and OneDrive
Experience with Azure and Microsoft Entra ID, including hybrid environments
Solid understanding of networking, including LAN/WAN, VLANs, firewalls, VPNs, and routing
Experience with Windows Server and on-premises Active Directory
Experience with RMM and PSA platforms; HaloPSA and NinjaOne are an asset
Strong troubleshooting and problem-solving skills
Experience mentoring, coaching, or providing technical direction to junior technicians
Strong client-facing communication skills and the ability to work with both technical and non-technical stakeholders
Strong organizational skills and the ability to manage multiple client environments and competing priorities

Nice to Have

Cybersecurity experience from a systems/infrastructure administration perspective
Experience with SentinelOne, Microsoft Defender, or other EDR/MDR platforms
FortiGate or other firewall experience
Microsoft 365 security experience, including Conditional Access, MFA, Intune, and DLP
Experience with infrastructure migrations to Azure/Microsoft 365
ITIL Foundation or working knowledge of ITIL practices
Experience supporting law firms or professional services organizations
Experience with operational technology (OT), building automation, or commercial property environments
Nutanix or Microsoft certifications

🔥 What Makes This Role Exciting?

Technical Variety: Work across virtualization, cloud, Microsoft 365, networking, and infrastructure
Client Exposure: Work directly with a diverse client base and become a trusted technical resource
Hands-On Environment: Take ownership of real infrastructure challenges and projects

Technical Growth: Continue developing your expertise across modern infrastructure and cloud technologies

Leadership Opportunity: Mentor junior technicians and play a key role in supporting the broader technical team

Base Salary: $90,000 - $120,000
Performance Bonus Eligibility
Paid Time Off & Extended Health Benefits (Medical/Dental/Vision)
Professional development, training, and certification opportunities

📩 Ready to Elevate Your Career? Apply Now!

At STACK IT Recruitment, we connect top talent with standout opportunities. If you meet at least 70% of the qualifications, we encourage you to apply, we’d love to chat!

Know someone perfect for this role? Share this with your network and help someone take the next step in their career.

✨ We’re committed to diversity and inclusion. Need accommodation during the hiring process? Let us know, we’re here to support you!

AI Use Disclosure:

STACK IT uses AI-enhanced tools to support initial candidate screening and interview note analysis. All assessments and hiring decisions remain human-led.

Apply on jobs.workable.com About employer

More about this job

Responsibilities

Manage and troubleshoot virtualized infrastructure, cloud environments, and network systems across various client sites. Serve as a senior escalation point for complex technical issues while leading infrastructure projects and mentoring junior staff.

Requirements

Requires at least 5 years of experience in systems administration or infrastructure engineering within a managed services environment. Candidates must possess strong hands-on expertise in Nutanix, Microsoft 365, Azure, and networking protocols.

Skills

Systems administration
Nutanix HCI
Microsoft 365
Azure
Entra ID
Networking
LAN/WAN
Firewalls
VPN
Windows Server
Active Directory
Troubleshooting
Infrastructure management
Technical documentation
Mentorship
Client relations

Benefits

Performance bonus
Paid time off
Medical insurance
Dental insurance
Vision insurance
Professional development
Training opportunities
Certification opportunities

Visa sponsorship

Not detected in the job text

Keywords

Systems Administration
Nutanix HCI
Microsoft 365
Azure
Entra ID
Networking
LAN/WAN
VLANs
Firewalls
VPN
Wi-Fi
Windows Server
Active Directory
RMM
PSA
HaloPSA
NinjaOne
Cybersecurity
SentinelOne
Microsoft Defender
EDR
MDR
FortiGate
Intune
DLP
ITIL
Infrastructure Engineering
Cloud Infrastructure
Hybrid Identity
Managed Services

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Network administrator jobs in Mississauga, ON and nearby