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Post Office Manager, Hourly Full Time Flexible Shifts
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Amphenol Communications Solutions

Senior System Administrator

Markham, ON, Canada

The base salary range for this position is $130,000 - $140,000 annually. · Full-time

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Job details

Pay: The base salary range for this position is $130,000 - $140,000 annually.
Job type: Full-time
Apply by: Nov 8, 2026
Posting language: English
Posted: Oct 9, 2026

Original job description

Location: Markham, ON Posted: 10/9/2026 Location Name: HSIO-Markham

Wage Max: 140,000.00 Wage Min: 130,000.00

Amphenol Communications Solutions (ACS), a division of Amphenol Corporation, is a world leader in interconnect solutions for Communications, Mobile, RF, Optics, and Commercial electronics markets. Amphenol Corporation is one of the world’s largest designers and manufacturers of electrical, electronic and fiber optic connectors and interconnect systems, antennas, sensors and sensor-based products and coaxial and high-speed specialty cable. ACS has an expansive global presence in research and development, manufacturing, and sales. We design and manufacture a wide range of innovative connectors as well as cable assemblies for diverse applications including server, storage, data center, mobile, RF, networking, industrial, business equipment, and automotive.

Amphenol (www.amphenol.com) is a Fortune 500 company and one of the largest manufacturers of interconnect products in the world. We design, manufacture, and market electrical, electronic, and fiber optic connectors, coaxial and flat-ribbon cable, and interconnect systems. The primary end markets for our products include communications and information processing, aerospace, military electronics, automotive, and other industrial applications.

Job Description

The Senior System Administrator will lead the design, modernization, security, and compliance of our IT infrastructure across on-premises and cloud environments, with a primary focus on Microsoft Azure. This role leads and mentors a team of System Administrators, owns the infrastructure roadmap, and drives the transition from legacy systems to secure, scalable, and automated platforms. The ideal candidate brings 5 to 8 years of hands-on experience, deep expertise in Azure, Windows Server, Microsoft Entra ID, and Microsoft 365, and a proven track record of leading teams, delivering modernization projects, and maintaining a strong security and compliance posture.

Roles & Responsibilities

Team Leadership: Lead, mentor, and manage a team of System Administrators. Assign and prioritize work, set performance goals, conduct reviews, and build team capability through coaching, knowledge sharing, and training.
Infrastructure Architecture: Design, document, and own the end-to-end architecture for on-premises, hybrid, and cloud infrastructure, including servers, storage, identity, networking, and backup, ensuring scalability, high availability, and cost-efficiency.
Azure Cloud Management: Architect and manage the Azure environment, including landing zones, subscription and resource governance, Azure VMs, Virtual Networks, Azure Backup and Site Recovery, Azure Files, Azure Monitor, Azure DNS, Key Vault, and Azure Policy. Optimize cloud spend through Azure Cost Management and right-sizing.
IT Modernization: Build and execute the infrastructure modernization roadmap: migrate legacy workloads to Azure, upgrade or retire end-of-life systems, adopt PaaS/SaaS where appropriate, and introduce automation and Infrastructure as Code (PowerShell, Bicep/ARM, or Terraform).
Identity & Endpoint Management: Oversee Active Directory, Microsoft Entra ID, Group Policy, and hybrid identity. Drive adoption of Conditional Access, MFA, Privileged Identity Management (PIM), and modern endpoint management through Intune and Autopilot.
M365 Administration: Govern Microsoft 365 services including Exchange Online, Intune, Teams, SharePoint Online, and OneDrive. Ensure secure, reliable, and well-governed operation of the Microsoft 365 environment.
Security Operations: Define and enforce the infrastructure security baseline, including system hardening, patch and vulnerability management, Microsoft Defender, SIEM monitoring (e.g., Microsoft Sentinel), least-privilege access, and Zero Trust principles. Lead response and root-cause analysis for security incidents and major outages.
Compliance & Governance: Ensure systems comply with corporate IT policies, audit requirements (e.g., SOX IT General Controls), and frameworks such as ISO 27001, NIST CSF, and CIS Benchmarks, as well as customer or defense-related requirements where applicable. Maintain access reviews and change control, prepare audit evidence, and track remediation to closure.
Backup, DR & Business Continuity: Own backup, disaster recovery, and business continuity plans. Define RTO/RPO targets and conduct regular restore and DR tests.
Virtualization & Data Centre: Manage Hyper-V and/or VMware virtualization, storage, and on-premises server infrastructure, including capacity planning and hardware lifecycle refresh.
Monitoring & Service Management: Use NinjaRMM, Azure Monitor, and ticketing systems to monitor system health and performance, define service levels, and ensure timely resolution of escalated incidents and problems.
Project & Vendor Management: Lead infrastructure projects such as upgrades, migrations, and new implementations from planning through delivery. Manage vendors, service providers, and licensing, and contribute to IT budget planning.
Documentation & Standards: Maintain architecture diagrams, standard operating procedures, runbooks, and configuration standards, and ensure team documentation is current and audit-ready.
Stakeholder Collaboration: Partner with IT leadership, business units, and global Amphenol IT teams to align infrastructure with business needs and corporate standards.

What You Bring To The Table

Education: Bachelor’s degree in Computer Science, Information Technology, or a closely related field. Equivalent combination of education and experience will be considered.
Experience: 8 to 10 years of progressive experience in system administration and IT infrastructure, including at least 3 years in a senior, lead, or architect role and demonstrated experience designing and managing production Azure environments.
Leadership: Proven experience leading, mentoring, or supervising a team of System Administrators, managing priorities across multiple projects, and delivering at least one major cloud migration or modernization initiative.
Technical Skills:

Expert knowledge of Windows Server, Active Directory, Microsoft Entra ID (including hybrid identity and Entra Connect), Group Policy, and M365.
Deep hands-on experience architecting and managing Microsoft Azure (IaaS, networking, Azure Backup/Site Recovery, Azure Monitor, Azure Policy, RBAC, and cost management).
Strong experience with the Microsoft security stack: Defender, Intune, Conditional Access, PIM, and Microsoft Sentinel or another SIEM.
Automation and scripting with PowerShell; experience with Infrastructure as Code (Bicep/ARM or Terraform) is a strong asset.
Proficiency with virtualization (Hyper-V and/or VMware), storage, and backup/DR solutions.
Solid understanding of networking fundamentals: TCP/IP, DNS, DHCP, VPN, firewalls, and VLANs.
Knowledge of Alibaba Cloud is highly desirable.
Experience with NinjaRMM, ITSM/ticketing systems, and ITIL-based processes.

Security & Compliance:

Working knowledge of IT General Controls (SOX), ISO 27001, NIST CSF, and CIS Benchmarks.
Experience supporting internal and external IT audits and driving remediation.

Certifications (Preferred):

Microsoft Certified: Azure Solutions Architect Expert
Microsoft Certified: Azure Administrator Associate
Microsoft 365 Certified: Administrator Expert
Windows Server Hybrid Administrator Associate

Certifications (Nice to Have):

Microsoft Certified: Cybersecurity Architect Expert or Security Operations Analyst Associate
ITIL 4 Foundation
CISSP, CISM, or CCNA

Other Skills:

Strategic thinker who can translate business needs into a practical technology roadmap.
Excellent communication skills, with the ability to explain technical topics to leadership and non-technical stakeholders.
Strong documentation and technical writing skills.
Calm, structured problem-solving under pressure, including major incident management.
Ability to work collaboratively across a global organization and independently when necessary.

Why Work for Us?

Benefits Coverage: Comprehensive health, dental, vision, and travel insurance.
Health Care Spending Account: Additional financial support for health-related expenses.
Pension Plan: Company-supported pension scheme.
Incentive Plans: Progressive employee incentive plans.
Talent Development: Opportunities for professional growth and development.
Company Recreation Club: Participate in fun activities, draws with exciting prizes, summer BBQs, holiday parties, and more!

Come join the Amphenol family!

The base salary range for this position is $130,000 - $140,000 annually. In determining the rate of pay, Amphenol considers a variety of nondiscriminatory factors, including but not limited to geographic location, relevant industry experience, qualifications, skills, and education. It would be rare for an individual to be hired at or near the top of the range for a given role. Base salary is one facet of Amphenol's total rewards package which includes participation in our comprehensive benefits program with medical, dental, and vision benefits, vacation, sick leave, paid holidays, life insurance, short/long term disability, and membership in our Defined Contribution Pension Plan.

Amphenol Corporation is proud of our reputation as an excellent employer. Our main focus is to provide the highest level of support and responsiveness to both our employees and our customers. Amphenol Corporation offers the opportunity for career growth within a global organization. We believe that Amphenol Corporation is unique in that every employee, regardless of his or her position, has the ability to positively impact the business.

Amphenol Corporation is proud of our reputation as an excellent employer. Our focus is to provide the highest level of support and responsiveness to both our employees and our customers, the world's largest technology companies. Amphenol Corporation offers the opportunity for career growth within a global organization. We believe that Amphenol Corporation is unique in that every employee, regardless of his or her position, has the ability to positively impact the business.

Amphenol is an “Equal Opportunity Employer” - Minority/Female/Disabled/Veteran/Sexual Orientation/Gender Identity/National Origin. For additional company information please visit our website at https://www.amphenol-cs.com/

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More about this job

Responsibilities

Lead and mentor a team of System Administrators while owning the architecture, security, and modernization roadmap for on-premises, hybrid, and Azure infrastructure. Manage cloud and Microsoft 365 services, identity, security, compliance, backup and disaster recovery, infrastructure projects, vendors, and operational documentation.

Requirements

Requires a bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent education and experience, along with 8–10 years of progressive infrastructure experience and at least 3 years in a senior, lead, or architect role. Candidates should have strong Azure, Windows Server, Entra ID, Microsoft 365, security, automation, virtualization, and compliance expertise, plus demonstrated team leadership and cloud modernization experience.

Skills

Azure Cloud Architecture
Windows Server Administration
Active Directory
Microsoft Entra ID
Microsoft 365 Administration
Team Leadership
Infrastructure Modernization
PowerShell Automation
Infrastructure as Code
Cloud Security
Identity and Endpoint Management
Disaster Recovery
Virtualization
IT Compliance and Auditing
Incident Management
Networking

Benefits

Health Insurance
Dental Insurance
Vision Insurance
Travel Insurance
Health Care Spending Account
Employee Incentive Plans
Professional Development Opportunities
Vacation
Sick Leave
Paid Holidays
Life Insurance
Short-Term Disability Insurance
Long-Term Disability Insurance

Visa sponsorship

Not detected in the job text

Keywords

Microsoft Azure
Windows Server
Active Directory
Microsoft Entra ID
Microsoft 365
Azure Virtual Machines
Azure Virtual Networks
Azure Backup
Azure Site Recovery
Azure Monitor
Azure Policy
Azure Cost Management
PowerShell
Bicep
Terraform
Microsoft Defender
Microsoft Intune
Conditional Access
Privileged Identity Management
Microsoft Sentinel
Hyper-V
VMware
NinjaRMM
SOX IT General Controls
ISO 27001
NIST CSF
CIS Benchmarks
ITIL
Alibaba Cloud
Zero Trust

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