Posted 2 days ago
Senior System Administrator
@ Robert Half
Newmarket, Ontario
Overview
Robert Half is hiring a Senior Systems Administrator for a well-established organization in Newmarket to lead infrastructure, security, and IT operations. The role owns day-to-day infrastructure, manages the MSP relationship and the Network Administrator, and drives modernization and cloud transformation. The posting lists a 7-hour workday (8:30am to 4:30pm), 100% employer-paid benefits, and RRSP matching up to 6%.
Responsibilities:
- Own day-to-day infrastructure and operational support
- Manage and mentor the Network Administrator
- Partner with the MSP and manage the vendor relationship
- Lead infrastructure modernization and cloud transformation projects
- Act as technology advisor to leadership
Requirements summary:
- 5+ years of infrastructure or systems administration experience
- Strong Microsoft infrastructure and hybrid cloud expertise
- PowerShell or similar scripting experience
- Vendor and MSP management experience
- Excellent communication and stakeholder management skills
Tools & skills
Source and dates
Source type not verified · apify-linkedin
- Employer posting date
- 2026-11-11
- First seen by our source
- 2026-11-14
- Source record updated
- 2026-11-14
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | IT |
| Experience | 5+ years |
| Manages people | Yes |
| Hours per week | 35 |
| Schedule | day |
| Travel | air: none · ground: none |
| Work setting | Office, Client sites |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Perks mentioned | Retirement plan, Transit support |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Robert Half
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
Helping you find skilled candidates, in-demand jobs, and solutions you need to do your best work yet.
Full company description
🔒 At Robert Half, we prioritize your security—if you believe you've encountered a scam or fraudulent recruiter, please report it immediately to https://www.roberthalf.com/us/en/fraud-alert. All Robert Half recruiters communicate using their corporate email address, ending in roberthalf.com. 👋 Welcome to Robert Half. We're the world’s first and largest specialized talent solutions firm, connecting opportunities at great companies with highly skilled job seekers. We provide dynamic contract, temporary, and permanent placement solutions across finance, accounting, technology, marketing, creative, legal, and administrative sectors. 🏆 In the last 12 months, Robert Half has been recognized as one of America’s Most Innovative Companies by Fortune, and with Protiviti, has been named one of the Fortune® World's Most Admired Companies™ and 100 Best Companies to Work For. 🏦 Traded on the New York Stock Exchange (symbol: RHI), we’re at the forefront of innovation in talent acquisition.
- LinkedIn followers
- 4,724,671
- People associated on LinkedIn
- 27,769
- Reported office locations
- 2884 Sand Hill Road Suite 200, Menlo Park, CA 94025, US
- 2613 Camino Ramon, San Ramon, California 94583, US
- Robert Half International, Avenue Louise, 250 - 5th floor, Brussels, 1050, BE
- Robert Half International, 10th floor, The Shard, 32 London Bridge Street, London, London SE1 9SG, GB
- Robert Half International, Av. Dr. Cardoso de Melo, 1184, 11° andar, Sao Paulo, SP 04548-004, BR
- Robert Half International, Level 24, 1 Martin Place, Sydney, NSW 2000, AU
- 140 William St, Melbourne, VIC 3000, AU
- Avenida Doutor Cardoso de Melo 1184, São Paulo, BR
- 2613 Camino Ramon, San Ramon, CA 94583, US
- 20, Avenue André Prothin, Tour Europlaza, Courbevoie, Île-de-France 92400, FR
- Business categories
- Skill Assessment
- Human Resources
- Information Technology
- Employment
- Consulting
- Recruiting
- Marketing
- Security
- Advertising
- Staffing Agency
- Other recorded names
- Robert Half
- Robert Half
- Specialties
- consulting services
- accounting jobs
- finance jobs
- administrative jobs
- legal jobs
- IT jobs
- recruitment
- recruitment agency
- creative jobs
- staffing
- hiring
- employment agency
- contract talent
- contract professionals
- talent solutions
- contract employment
- permanent placement
- customer support jobs
- and marketing jobs
- Profile identifies a recruitment agency
- Yes
- Reported total investment
- 0
Currency and observation date were not supplied; this is not a current valuation or a funding round.
🔒 At Robert Half, we prioritize your security—if you believe you've encountered a scam or fraudulent recruiter, please report it immediately to https://www.roberthalf.com/us/en/fraud-alert. All Robert Half recruiters communicate using their corporate email address, ending in roberthalf.com. 👋 Welcome to Robert Half. We're the world’s first and largest specialized talent solutions firm, connecting opportunities at…
| Field | Value |
|---|---|
| Industry | Staffing and Recruiting |
| Company size | 10,001+ employees |
| Headquarters | Menlo Park, CA |
| Organization type | Public Company |
| Year founded | 1948 |
| Specialties | consulting servicesaccounting jobsfinance jobsadministrative jobslegal jobsIT jobsrecruitmentrecruitment agencycreative jobsstaffing |
| Open jobs on Jobsy | 503 |
| View page |
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
• Strong 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
• Stable 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)
Journal
Only you can see this. Kept on this device, and in your account when you sign in.