Robert Half is exclusively partnered with a well-established organization in Newmarket that is looking to hire a Senior Systems Administrator to lead infrastructure, security, and IT operations across the business.

This is a highly visible role that combines hands-on technical leadership with stakeholder engagement, vendor management, and strategic planning. The successful candidate will play a key role in modernizing the environment while helping the organization move further toward a cloud-first future.

What You'll Be Working On

This is not a traditional "keep the lights on" Systems Administrator position. The goal is to bring in someone who can take ownership of infrastructure operations, lead continuous improvement initiatives, and become the go-to infrastructure resource for the business.

Responsibilities include:

- Owning day-to-day infrastructure and operational support
- Managing and mentoring the Network Administrator
- Partnering with the MSP and managing the vendor relationship
- Responding to issues affecting internal users and external clients
- Identifying opportunities for infrastructure improvements and modernization
- Making security recommendations and driving best practices
- Supporting disaster recovery, redundancy, and business continuity initiatives
- Leading and contributing to infrastructure-related projects
- Acting as a trusted technology advisor to leadership and business stakeholders

This role offers significant autonomy and influence, with the objective of allowing the VP, IT to transition away from day-to-day operational IT responsibilities.

Technology Environment

- Microsoft environment
- Hybrid Active Directory




- Azure / Entra ID
- Windows Server
- Exchange Online & on-prem Exchange
- SQL Server
- SharePoint
- Sophos Firewalls
- DNS / DHCP
- Virtualization technologies
- PowerShell automation
- Telephony and voice technologies
- Disaster recovery and redundancy solutions

Upcoming Projects

- Enhancement of disaster recovery and redundancy capabilities
- Continued cloud transformation initiatives
- Client portal deployment and supporting infrastructure
- Ongoing telephony modernization projects
- Security improvements and operational automation

What We're Looking For

- 5+ years of infrastructure, systems administration, or IT operations experience
- Strong Microsoft infrastructure expertise
- Experience supporting hybrid cloud environments
- Network, security, and systems administration experience
- Solid troubleshooting and problem-solving skills
- Experience managing vendors or MSP relationships
- Excellent communication and stakeholder management abilities
- Comfortable working directly with clients and senior leadership
- A passion for technology and continuous improvement
- Automation mindset with PowerShell or similar scripting experience

Why Consider This Opportunity?

- Opportunity to become the senior infrastructure leader within the organization
- Broad ownership across infrastructure, security, operations, and vendor management
- Executive visibility and influence
- Secure organization with a long-tenured technology team
- 100% employer-paid benefits
- RRSP matching up to 6%
- Annual salary reviews
- Paid certifications and professional development
- Free onsite parking
- 7-hour workday (8:30am - 4:30pm)

📌 Senior System Administrator (Newmarket)
🏢 Robert Half
📍 Newmarket