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Senior Systems Administrator – Level 2/3 Managed Services

Offre en anglais

Toronto, ON
Hybride
Publié 1 sept. 2026
1 poste

85 000 $–110 000 $ / année

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Type d’emploi: Temps plein
Niveau d’expérience: Expérimenté · 5+ ans
Formation minimale: Diplôme professionnel
Langue de l’offre: anglais
Heures de travail: 38 heures par semaine

Résumé du poste

Manage day-to-day network and systems operations across multiple client environments while serving as a senior escalation point for technical issues. Provide technical direction and mentorship to junior technicians while leading infrastructure and cybersecurity projects.

Détails du poste

Senior Systems Administrator – Level 2/3 Managed Services Location: Midtown Toronto, ON Work Arrangement: Primarily office-based with flexibility for remote work and scheduled client/site visits Job Type: Full-Time, Permanent Salary: $85,000 – $110,000 per year, based on experience and qualifications Bonus: Up to 10% annual performance-based bonus About the Role Our client is a growing managed IT and security services organization supporting professional services, legal, and commercial real estate clients across North America. They are seeking a Senior Systems Administrator to take ownership of complex client environments from day-to-day operations through project delivery. This is a senior, client-facing technical role that combines systems and network administration, Microsoft 365, cybersecurity, managed services, and building technology environments. The successful candidate will serve as a senior escalation point for Level 1/2 technical issues while also providing day-to-day technical direction and mentorship to junior technicians. The role offers broad exposure across multiple client environments rather than being dedicated to a single account, making it an excellent opportunity for an experienced MSP professional who enjoys variety, problem-solving, client interaction, and technical ownership. Key Responsibilities Systems, Network & Client Environment Management Manage day-to-day network and systems operations across multiple client environments, including servers, firewalls, switches, Wi-Fi, and endpoints. Serve as a senior escalation point for Level 1/2 technical issues and drive incidents through to resolution. Lead patch management, firmware updates, maintenance windows, and infrastructure upgrades while minimizing business disruption. Maintain accurate technical documentation, including network diagrams, credentials, run-books, and client environment information. Support legal and professional services applications, including document and practice management platforms. Provide hands-on technical support across diverse client environments. Microsoft 365 Administration Administer Microsoft 365 environments end-to-end, including Exchange Online, SharePoint, Teams, OneDrive, licensing, and user provisioning. Configure and maintain Microsoft 365 security controls, including Conditional Access, MFA, Intune, Defender for Office 365, and Data Loss Prevention. Manage Microsoft Entra ID/Azure AD, including hybrid Active Directory synchronization, user and group management, and single sign-on. Lead and support migrations from on-premises infrastructure to Microsoft 365. Monitor tenant health, licensing, security, and compliance across multiple client environments. Maintain accurate documentation of Microsoft 365 configurations, licensing, and security settings. Cybersecurity & Security Operations Administer and maintain endpoint detection and response (EDR) solutions across client environments. Monitor and respond to security alerts, investigate detection, and coordinate remediation activities. Work with external managed detection and response/SOC providers on security investigations and escalations. Ensure appropriate endpoint and network coverage across managed environments. Support SIEM log source onboarding and monitoring. Participate in vulnerability remediation, security posture reviews, and cybersecurity maturity initiatives. Document security incidents, remediation activities, and lessons learned. Managed Building Technology & OT Support network and infrastructure operations across multi-building commercial property environments. Manage servers, domain controllers, endpoints, networks, and operational technology (OT) systems. Administer Nutanix hyper-converged infrastructure, including cluster health, virtual machines, and routine maintenance. Support network segmentation and firewall management to isolate OT environments. Assist with EDR/MDR monitoring and firewall log reviews. Manage vendor remote access, including VPN provisioning, credential audits, and access registers. Participate in vulnerability scanning, remediation tracking, and cybersecurity initiatives across building networks. Team Leadership & Mentorship Provide day-to-day technical direction to Level 1 technicians and help prioritize incoming work. Review Level 1 ticket resolutions for quality, completeness, and adherence to documentation standards. Act as the first escalation point for junior technicians. Mentor and coach technicians on troubleshooting methodology and best practices. Assist with onboarding and training new technical team members. Identify recurring issues and drive root-cause solutions and process improvements. Projects & Client Relationships Lead or support infrastructure projects, including server migrations, Microsoft 365 projects, and building technology initiatives. Develop strong relationships with client stakeholders and act as a trusted technical advisor. Communicate technical information effectively to both technical and non-technical stakeholders. Deliver a high level of customer service within professional, confidentiality-sensitive client environments. Participate in strategic service delivery initiatives as the organization continues to grow. Requirements Requirements 5+ years of experience in systems/network administration within an MSP or similar multi-client environment. Hands-on experience with an RMM and PSA platform used for ticketing, SLA management, monitoring, and reporting. Experience with platforms such as HaloPSA, NinjaOne, ConnectWise, AutoTask, or similar. Experience administering Nutanix HCI, including cluster management and AHV/VM administration. Strong experience with Microsoft 365 administration, including Exchange Online, SharePoint, Teams, and OneDrive. Hands-on experience with Microsoft 365 security features, including Conditional Access, MFA, Intune, Defender for Office 365, and DLP. Practical knowledge of on-premises Active Directory, Microsoft Entra ID/Azure AD, and hybrid environments. Experience supporting or leading migrations from on-premises infrastructure to Microsoft 365. Solid understanding of networking concepts, including LAN/WAN, VLANs, and firewalls. FortiGate experience is an asset. Familiarity with EDR/MDR platforms and fundamental security operations concepts. Experience mentoring, coaching, directing, or reviewing the work of junior technicians. Strong client-facing communication skills with the ability to work comfortably with non-technical stakeholders. ITIL Foundation certification or working knowledge of ITIL incident, change, and problem management is an asset. Experience supporting law firms, professional services organizations, or commercial property environments is an asset. Experience with operational technology (OT), building automation systems, or multi-site commercial environments is an asset. Valid Ontario driver's license and reliable vehicle preferred. Must be able to complete a criminal background check before employment successfully. Benefits Compensation & Benefits $85,000 – $110,000 base salary Annual performance bonus of up to 10% Comprehensive health, vision, and dental benefits, including family coverage Three weeks of paid vacation to start Additional vacation entitlement based on tenure Professional development, training, certifications, conferences, and professional memberships Ongoing coaching and career development opportunities Flexible remote work options alongside scheduled office and client/site visits Free nearby parking Company-provided laptop and required business tools Mileage reimbursement for approved business travel Collaborative, team-oriented work environment with direct access to leadership Why Join? This is an opportunity to join a growing managed services organization in a senior technical capacity with broad exposure to legal, professional services, and commercial real estate environments. The successful candidate will have the opportunity to work across a diverse client portfolio, influence service delivery processes, mentor junior technicians, contribute to infrastructure and cybersecurity projects, and play an important role in the organization's continued growth. Schedule: Monday to Friday, 7.5-hour shifts, with a scheduled after-hours on-call rotation.

Ce que vous ferez

Exigences

Requires 5+ years of experience in systems and network administration within an MSP environment. Must have hands-on expertise with Microsoft 365, Nutanix HCI, and various security platforms.

Avantages

• Health benefits • Vision benefits • Dental benefits • Performance bonus • Paid vacation • Professional development • Training • Certifications • Career development • Mileage reimbursement • Company-provided laptop