System Administrator Technical Lead

Momentous Ltd.; Ottawa; On-site; CAD 90,000 - 120,000; Full time

Job summary

A progressive technology firm in Ottawa is seeking a skilled system administrator leader to join its dynamic team. The role involves leading a team in managing cloud infrastructure, overseeing system administration tasks, and ensuring high performance and security standards. The ideal candidate will have over 8 years of experience in system administration, strong technical capabilities, and a collaborative attitude. This is an exciting opportunity to help modernize and innovate technological solutions.

Qualifications

• 8+ years in cloud, infrastructure, and system administration.
• Proven leadership experience in technical teams and agile projects.
• Deep proficiency in system administration and web technologies.

Responsibilities

• Lead a small team and oversee cloud and on-premises infrastructure.
• Provide second-level support for customer websites and applications.
• Monitor system performance and troubleshoot issues efficiently.

Skills

Cloud infrastructure management

System administration

Linux and Windows DevOps

Scripting languages (Bash, Perl, Python, JavaScript)

Agile methodologies

Performance monitoring

Customer support

Database management

Network protocols

Education

Engineering or Computer Science degree

Tools

AWS (EC2, VPC, S3, etc.)

Plesk

Managed WordPress

Virtuozzo VPS

Job description

Reports to: Director of Technology

Location: In office, Ottawa

We are seeking an accomplished system administrator leader with strong technical capabilities and a desire to make a difference to join our dynamic and agile technology team.

At Rebel, we’re in the middle of a bold reinvention. We were early to market and established as a powerhouse in the domain registrar arena. Now we’re looking for someone who’s ready to help us take it further.

This isn’t just a support role. You’ll be embedded in a tight-knit, nimble team of engineers and developers, working across both live production and new cloud-based infrastructure. From web hosting to email, DNS to domain management, you’ll help power the services that keep thousands of websites online—and make sure they’re fast, secure, and future‑proof.

You’re the kind of person who likes being in the thick of things: hands‑on, proactive, quietly confident in your problem‑solving, and motivated to keep improving. If you’re the one your team relies on when something’s on fire, this is your kind of place.

About Rebel

Rebel helps people and businesses get online with domains, hosting, email, and security solutions. We were early to market and built a reputation for reliability and service. Today, we’re modernizing our platforms and product experience so customers can launch and grow online with less friction.

About this role

You’ll lead by example—guiding a small team while shipping reliable, scalable infrastructure. You’ll own outcomes across performance, availability, security, and cost, and you’ll have room to simplify legacy systems while accelerating our move to cloud‑native services.

What you will do

Leadership & Delivery

• Agile and technical team leadership (scrum master, people management)
• Support the leadership team with long‑term planning
• Contribute to the creation, improvement, and monitoring of service and team KPIs

Customer & Production Support

• Provide second‑level support for customer websites, applications, and email
• Occasional after‑hours support (typically up to 1–2 incidents per week)

Hosting & Platform

• Maintain and improve our hosting offerings: Plesk, Managed WordPress, Virtuozzo VPS servers, and others
• Support DNS and domain management workflows in production

Cloud & Infrastructure

• Maintain and optimize existing infrastructure including AWS and other compute services
• Design scalable cloud‑based infrastructures
• Work on client migrations to support them and improve efficiencies

Reliability, Performance & Cost

• Monitor system performance, troubleshoot issues, and resolve them efficiently
• Monitor cost; propose and execute initiatives to improve service quality and cost efficiency

Systems, Databases & Scripting

• Administer Unix/Linux and Windows‑based systems
• Administer database systems (MSSQL, MySQL)
• Code and script using a wide variety of open‑source technologies and tools

Modernization & Automation

• Work with infrastructure‑as‑code tools
• Research, develop, and implement the latest technologies in the cloud (AWS)
• Re‑imagine legacy systems and replace them with newer technologies
• Contribute to IT operations processes
• Automate manual processes

What you bring

Experience

• 8+ years in cloud, infrastructure, and system administration with a proven problem‑solving track record
• 8+ years in enterprise Linux and Windows DevOps, configuration management, software development, and agile processes
• 5+ years with scripting languages such as Bash, Perl, Python, or JavaScript
• 3+ years leading technical teams
• 3+ years leading agile projects and serving as scrum master

• Deep proficiency in system administration, security, networking, and web technologies
• Detailed understanding of core network protocols and services (TCP/IP, HTTP/HTTPS, REST/SOAP, FTPS/SFTP, DNS, SSL/TLS, firewalls, load balancers)
• Advanced knowledge of AWS services: EC2, VPC, S3, ELB, EBS, RDS, Route 53, Docker, Serverless
• Experience with source control, automated builds, and continuous integration
• Analytical skills for performance measurement and data‑driven decisions
• Love for clean, scalable, repeatable infrastructure
• A collaborative attitude—you support what you build and help others level up

Education

• An Engineering, Computer Science, or related degree and System Administration experience