Milton On Senior systems administrator active Jobs – 12 Openings This Week

Senior IT Administrator
Cyclone Manufacturing Inc. —Mississauga, ON
- $32–$35 an hour
- Full-time
- Azure
- Computer Science
- Bachelor's
- Dental care
Quick apply
Senior IT Specialist
Toolbox Cloud —Mississauga, ON
- $76,000–$90,000 a year
- Full-time
- Hybrid work
- Azure
- Windows
- AWS
- Mileage reimbursement
- Paid time off
Quick apply
Senior Systems Administrator - Active Directory
Royal Bank of Canada —Mississauga, ON
- Full-time
- Computer Science
- Windows
- Java
Systems Administrator_Level 2 (In-Office)
ProServeIT —Oakville, ON
- $45,000–$80,000 a year
- Full-time
- Computer Science
- Windows
- Analysis skills
Quick apply
10d
Senior Advisor, Business Continuity and Disaster Recovery - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $105,000–$120,000 a year
- Full-time
- Bachelor's
- Continuous improvement
- Business
- Dental care
Manager, IT Support Services - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $95,000–$110,000 a year
- Full-time
- Azure
- Computer Science
- Windows
- Dental care
Business Transformation Advisor - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $95,000–$110,000 a year
- Full-time
- PMP
- Presentation skills
- Bachelor's
- Dental care
6d
Operations Lead Analyst, Fraud, Waste and Abuse - 12 Month Contract - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $32–$37 an hour
- Full-time
- Microsoft Excel
- Microsoft Access
- Administrative experience
- Dental care
12d
Senior Advisor Operational Risk and Resiliency - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $105,000–$120,000 a year
- Full-time
- Bachelor's
- Continuous improvement
- Business
- Dental care
IT Technical Advisor Senior
Intact —Mississauga, ON
- Full-time
- Hybrid work
- Bilingual
- Computer science
- Computer Science
- Employee stock purchase plan
11d
Junior Quality Assurance Engineer - Express Scripts Canada
The Cigna Group —Mississauga, ON
- $57,000–$61,000 a year
- Full-time
- Oracle
- Computer Science
- DevOps
- Dental care

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Senior Storage Administrator
IVARI —Toronto, ON
College diploma or university degree in Computer Science or Information Technology. Knowledge of storage architecture, design principles, and data management…
$83,500–$115,000 a year
Quick apply
14d
Director, Corporate Technical Operations (Corporate Systems)
Accommodations Plus International —Markham, ON
Bachelor's degree in Information Technology, Computer Science, Business Administration, or a related field; Master's degree or MBA preferred; equivalent…
$140,000–$160,000 a year
10d

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Senior IT Administrator

Cyclone Manufacturing Inc.
Mississauga, ON

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Job details

Permanent | Full-time
$32–$35 an hour

Qualifications

Microsoft Windows Server
ITIL Certification
System administration
Azure
Computer Science
Financial auditing
CCNA
LAN
Incident response
Bachelor's
Virtualization
IT support
Network architecture
Communication skills
Active Directory
Information Technology
VPN

Full job description

Cyclone Manufacturing (A Mubea Aviation Company) is a vertically integrated full-service provider of 3-5 axis machining, sheet metal fabrication, tube bending, welding and minor sub-assemblies of aerospace structural components to the largest aerospace companies such as Boeing, AIDC, Bombardier, Embraer, FACC, GE, IAI, Liebherr, Lockheed Martin, MHI, SAAB, Stelia, Spirit AeroSystems and Triumph Aerostructures. Our surface treatment and controlled processes are approved by the major OEMs such as Airbus, Boeing, Bombardier, Embraer, IAI and Lockheed Martin.

Cyclone is a privately owned company with over 750 highly skilled employees housed within six state-of-the-art facilities totaling 450,000 square feet in both Canada and Poland.

Job Summary

We are seeking an experienced Senior IT Administrator serves as the organization's highest-level technical escalation point, responsible for the stability, security, and performance of enterprise IT infrastructure and business-critical systems. Operating within a demanding manufacturing and aviation environment, this role bridges IT and Operational Technology (OT), partnering with production, finance, and operations teams to ensure seamless system availability across all shifts.

The successful candidate brings deep expertise in Windows server environments, virtualization and network architecture, combined with the communication skills to translate complex technical challenges into actionable business solutions

Key Responsibilities:

1. Advanced Technical Support (L3 Escalation)

Serve as the final escalation point for complex infrastructure.
Lead root cause analysis (RCA) and implement durable, long-term remediation strategies
Develop and maintain runbooks, escalation procedures, and post-incident review documentation.

2. IT Infrastructure Administration

Administer Windows Server Environment, Active Directory (AD), and the full Microsoft 365 ecosystem
Deploy and manage Hyper-V virtual machines, physical servers, RAID storage arrays, and NAS systems
Oversee user lifecycle management: account provisioning, role-based access controls, and deprovisioning
Monitor system health, availability, and capacity; respond proactively to alerts and performance trends
Execute patch management cycles and endpoint protection strategies across all managed assets
Maintain and test backup processes and disaster recovery (DR) plans to meet defined RTO/RPO targets
Administer VPN, remote access solutions, and site-to-site network connectivity

3. Network Administration

Design, configure, and maintain LAN/WAN infrastructure including VLANs, routing, switching, and firewall rule sets
Collaborate with security teams to enforce network segmentation, access control policies, and compliance requirements

4. ERP System Administration

Administer and support the organization's ERP platform (SAP, Microsoft D365, AX 2012 etc.)
Manage ERP user roles and permission structures.

5. IT/OT Coordination & Manufacturing Support

Act as the IT liaison for operational technology systems at the intersection of shopfloor and enterprise environments
Support production-critical systems and ensure minimal disruption to manufacturing and aviation operations
Generate operational, compliance, and management reports to inform leadership decision-making

6. Vendor, Documentation & Compliance

Manage vendor relationships for hardware, software licenses, and third-party service contracts
Maintain accurate IT documentation: network diagrams, system configurations, SOPs, and change records
Support internal and external audits with evidence collection and control documentation

Required Qualifications

Diploma or bachelor’s degree in information technology, Computer Science, or a related technical discipline
6–8 years of progressive IT support and systems administration experience
6–8 years hands-on experience deploying and administering physical servers, Hyper-V virtual environments, RAID storage, and NAS systems

Certifications (Preferred)

ITIL Foundation — IT Service Management best practices
Microsoft Certified: Azure Administrator / Windows Server Hybrid Administrator
Cisco CCNA or equivalent networking credential

Core Competencies

Competency Area and What We're Looking For

L3 Troubleshooting-Advanced fault isolation across servers, endpoints, networks, and ERP layers; structured RCA methodology
Infrastructure & Virtualization-Windows Server, Active Directory, Hyper-V, physical server deployment, RAID, NAS
Networking-VLANs, routing, switching, firewall management, high-availability design, VPN
ERP Administration-SAP / D365 / AX 2012 user management, access controls, workflow support
Security & Compliance-Patch management, endpoint protection, access governance, audit readiness (ITAR, NIST, ISO)
Stakeholder Communication-Ability to translate technical issues to business audiences; collaborate across IT, Operations, and Finance
24/7 Operational Mindset-Comfortable with on-call responsibilities and critical incident response in shift-oriented environments
Documentation-Accurate, up-to-date runbooks, network diagrams, SOPs, and change records

Job Types: Full-time, Permanent

Pay: $32.00-$35.00 per hour

Benefits:

Dental care
On-site parking
RRSP match

Application question(s):

What is your current work authorization status in Canada?

Please note that, due to Controlled Goods Program requirements, only Canadian citizens and permanent residents are eligible for employment consideration

Work Location: In person

Quick apply

Refine Your Search

senior systems administrator active jobs in milton on

Senior IT Administrator

Senior IT Specialist

Senior Systems Administrator - Active Directory

Systems Administrator_Level 2 (In-Office)

Senior Advisor, Business Continuity and Disaster Recovery - Express Scripts Canada

Manager, IT Support Services - Express Scripts Canada

Business Transformation Advisor - Express Scripts Canada

Operations Lead Analyst, Fraud, Waste and Abuse - 12 Month Contract - Express Scripts Canada

Senior Advisor Operational Risk and Resiliency - Express Scripts Canada

IT Technical Advisor Senior

Junior Quality Assurance Engineer - Express Scripts Canada

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