Network Administrator with 15+ Years IT Experience

Mr. Osman Siddiqui

Phone number: 416-***-**** Email address: ************@*****.***

Professional Summary

System Administrator with 7+ years of experience managing Microsoft Azure, Microsoft 365, and hybrid cloud infrastructure. Reduced ticket resolution time by 30% and strengthened security posture through proactive risk mitigation. Expertise in Active Directory, Entra ID, Intune, identity and access management, and cybersecurity monitoring. Proven ability to optimize IT platforms, enhance operational efficiency, and deliver high quality end user support aligned with business objectives. 03/2020 – present

Markham, Canada

Work Experience

System Administrator

Kinark Child and Family Services

Supported and maintained infrastructure platforms including Microsoft 365, Teams, SharePoint, audio/video systems, Azure cloud (IaaS, PaaS, SaaS), networking, and IT security to ensure high availability and operational continuity. Applied a cybersecurity lens to daily IT operations, strengthening secure configuration of network infrastructure, cloud services, and end-user environments.

Engineered and deployed comprehensive risk mitigation strategies across IT systems, slashing exposure to security vulnerabilities by 30% and elevating compliance posture to 95%.

Partnered with the Information Security Analyst to conduct vulnerability scanning, risk assessments, and remediation planning across cloud and on- premises environments.

Configured, monitored, and responded to incidents using IT monitoring and security event management tools, ensuring timely incident response and resolution.

Oversaw identity and access management across Active Directory, LDAP, and Entra ID, including onboarding, offboarding, privileged access controls, MFA configuration, and secure access to file shares, SharePoint, and business applications.

Spearheaded comprehensive security audits across 120+ servers/endpoints, decreasing critical vulnerabilities by 40% and slashing remediation time from 72 to under 24 hours.

Ensured timely patch management across servers, endpoints, and cloud platforms to maintain system integrity and minimize vulnerabilities. Collaborated with data systems teams, IT project managers, digital transformation teams, application developers, integration specialists to support infrastructure initiatives and day-to-day operations.

Provided escalation support for complex Tier 2 and Tier 3 incidents, resolving Azure, Microsoft 365, networking, and physical infrastructure issues. Supported infrastructure design and implementation for new systems and projects, validating solution quality and security prior to deployment. Contributed to disaster recovery preparedness by supporting backup validation, recovery testing, and business continuity planning. I identified cost optimization opportunities within Microsoft 365 licensing, cloud resource utilization, and infrastructure services. Maintained IT lifecycle management processes including asset tracking, hardware refresh planning, license management, and decommissioning procedures. Developed and maintained IT knowledge base articles, user guides, configuration documentation, and process documentation to improve team efficiency S

Work Experience

01/2017 – 01/2020

Toronto, Canada

IT Operations Support Specialist

Canadian Tire

Cut ticket resolution time by 30%, enhancing user satisfaction and operational efficiency.

Conducted root cause analysis on recurring issues, reducing repeat incidents by 25% and improving system stability.

Standardized troubleshooting documentation for 40+ technicians, boosting resolution consistency and facilitating knowledge sharing. Streamlined workflows to increase Level 1 and 2 ticket resolution rates by 25%, optimizing support operations.

Diagnosed and resolved 30+ escalated endpoint security incidents using advanced tools, improving overall security posture and reducing critical vulnerabilities.

Skills

CLOUD & INFRASTRUCTURE

Microsoft Azure

Advanced

Microsoft 365 (O365)

Advanced

Cloud Infrastructure

Advanced

SaaS Platforms

Intermediate

IaaS and PaaS

Intermediate

SECURITY & RISK MANAGEMENT

Cyber Security

Intermediate

Vulnerability Scanning

Intermediate

Risk Assessments

Intermediate

Security Event Management

Intermediate

Identity and Access Management

Advanced

Patch Management

Intermediate

Disaster Recovery

Advanced

APPLICATIONS & COLLABORATION

Teams Administration

Advanced

SharePoint Administration

Advanced

Exchange Online

Advanced

Audio/Video Systems

Intermediate

NETWORKING & IT SUPPORT

Network Infrastructure

Intermediate

IT System Monitoring Tools

Intermediate

End-user Hardware Support

Intermediate

SOFT SKILLS

Customer Service

Advanced

Collaboration

Advanced

Skills

– SOFT SKILLS

Mentoring

Intermediate

Problem Solving

Advanced

Process Improvement

Intermediate

Continuous Learning

Intermediate

09/2020

Toronto, Canada

Education

Bachelor of Information Technology Degree

York University

Certificates

02/2018 Citrix Associate

Citrix

04/2020 AZ-104: Azure Administrator Associate

Microsoft

11/2025 ITIL 4 Foundation

Peoplecert

12/2024 Terraform Associate Certification (003)

HashiCorp

01/2024 Fortinet Network Security Associate

Fortinet

Strengths

# Adaptability # Problem-Solving # Leadership # Communication # Strong Work Ethic Awards

04/2024 KARE Team Award, 2024 – Best IT Support

Kinark Child and Family Services

Awarded for exceptional IT support, responsiveness, and teamwork. 04/2025 KARE Team Award, 2025

Kinark Child and Family Services

Recognized for outstanding IT support and consistent service excellence. Strong professional references, including senior IT leadership, available upon request.

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