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Calian in Space & Technology

Network Administrator

Ottawa, ON, Canada

Pay: $80,000 to $100,00
Job type: Full-time
Apply by: Oct 29, 2026
Posting language: English
Posted: Sep 28, 2026

Apply About employer

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Original job description

About Calian

At Calian, we help organizations overcome obstacles, manage risks, and drive progress. Since 1982, we’ve grown from a small consulting firm into a trusted global company across defence, space, health, nuclear energy, public safety, and government.

We create innovative solutions that tackle complex challenges and help organizations and communities stay resilient, informed, and connected. If you’re driven by purpose and energized by solving real-world challenges, we want you on our team.

Job Type: Full Time

Position Overview

We are looking for a Network Infrastructure Administrator to join our Infrastructure Management team. In this role, you will be responsible for the design, implementation, and support of Calian’s network infrastructure systems, including enterprise Wi-Fi, firewall, routing, switching, policy enforcement, and automation across site, data center, and cloud environments. You will leverage your expertise in Fortinet and Zscaler technologies to ensure secure, high-performance connectivity across internet and private networks.

Working closely with Calian IT and business unit development teams, you will manage secure network connectivity, optimize firewall and SD-WAN configurations, maintain high availability and disaster recovery capabilities, and support the continuous improvement of network infrastructure. The ideal candidate is proactive, solutions-focused, and skilled at identifying and resolving complex network issues to ensure stability, security, and performance.

Responsibilities

Own and manage enterprise Wi-Fi infrastructure, ensuring optimal performance and coverage across all environments.
Administer and optimize Fortinet firewalls, VPNs, security policies, and FortiManager configurations.
Administer and support Zscaler cloud security services for secure internet and private connectivity.
Design and enforce enterprise-wide network policies, including firewall rules, access controls, and compliance standards.
Monitor and optimize network performance, capacity, and security across hybrid environments.
Implement and maintain network redundancy and disaster recovery solutions.
Integrate and support on-premises and cloud-based network services in Azure and AWS environments.
Implement network automation and monitoring tools, including FortiManager and SNMP-based solutions.
Collaborate with security teams to enforce network security best practices and compliance requirements.
Troubleshoot network issues within Fortinet environments, including firewall rules, VPNs, and wireless connectivity, quickly identifying root causes and implementing effective solutions to maintain network stability and performance.
Perform other duties as required within the scope of the role.

Qualifications

College diploma or university degree in Computer Science or a related field, or equivalent relevant experience.
3+ years of experience with enterprise networking, including routing, switching, and firewalls.
3+ years of hands-on experience with Fortinet technologies, including FortiGate, FortiManager, and FortiAnalyzer.
Experience supporting Zscaler cloud security services.
Strong understanding of network security, DNS, DHCP, VLANs, SD-WAN, VPN technologies, and the OSI model.
Experience with cloud networking in Azure and AWS environments and hybrid connectivity solutions.
Experience using FortiManager and FortiAnalyzer for centralized policy management and log analysis.
Strong analytical and troubleshooting skills with the ability to resolve complex network challenges.

Compensation

Additional Requirements

$80,000 to $100,00

Position Type

We have 1 available position.

# #SF#

AI Usage Disclosure

At Calian, we do not use Artificial Intelligence (AI) to screen or evaluate candidates. AI tools may support backend administrative tasks, but they do not influence hiring decisions. All evaluations and decisions are made by real people on our recruitment team and hiring managers. All applicants are reviewed and only those chosen for an interview will be contacted by our recruiting team.

How we hire

Our hiring process is designed to help us get to know you and discover if you are the best fit for our team. It's also an opportunity for you to gauge if a role at Calian is the right fit for you.

Throughout the process, we’ll share details of the kind of work you’ll be doing, the projects you’ll be working on, the team you’ll be joining, and what it’s like working at Calian. Our biggest tip throughout the process is to just be your authentic self!

Our commitment to diverse, yet highly specialized solutions require many different skills and abilities. We look for the best talent that can contribute to Calian’s success as well as enhance our culture. We encourage you to apply to a role or join our talent community and sign up for job alerts that match your area of expertise and what you are looking for in your next opportunity.

During the recruiting process, you’re encouraged to notify us of any accommodations you may require. We’ll be happy to help.

We give the same time and consideration to everyone who applies. Here are a few things you can do to ensure your application shines:
Do your research on Calian, the department, and team you are looking to join
Add a cover letter that explains why you are a good fit for this position
Share a portfolio, personal websites, or links to your professional social media
In your CV, highlight your key achievements - this is your time to brag
Include dates! Share the timeline of your experience
Stand out by tailoring your resume to each position you apply to
Only apply to roles you’re genuinely interested in and that align to your experience
Be prepared! Do your research on Calian, the department, and team you are looking to join
View the responsibilities for the role and find examples that demonstrate how you’ve completed these in your previous work experience
Prepare a list of questions to ask us
Dress business casual for your interview (virtual and in person)
We assess your skills and fit, you assess our fit for you
We keep you updated and share expectations as we make progress in the recruiting cycle
Feel free to reach out to your Talent Acquisition Specialist at any time during the hiring process

Perks and benefits

Competitive, company-paid benefits
Generous time off package
Stock purchase plan
RRSP program
Flexible work hours for eligible roles
Programs to support employee health and well-being

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Apply About employer

More about this job

Responsibilities

Design, implement, administer, and optimize enterprise network infrastructure across site, data center, and cloud environments, including Wi-Fi, Fortinet firewalls, VPNs, SD-WAN, and Zscaler services. Monitor and troubleshoot network performance and security, maintain redundancy and disaster recovery, support Azure and AWS connectivity, and collaborate with IT and security teams on policies and continuous improvement.

Requirements

A college diploma or university degree in Computer Science or a related field, or equivalent relevant experience, is required. Candidates should have at least three years of enterprise networking and hands-on Fortinet experience, experience supporting Zscaler, knowledge of core networking and security technologies, and familiarity with Azure, AWS, and hybrid connectivity.

Skills

Enterprise Networking
Routing
Switching
Fortinet
FortiGate
FortiManager
FortiAnalyzer
Zscaler
Firewall Administration
Enterprise Wi-Fi
SD-WAN
VPN Technologies
Network Security
Azure Networking
AWS Networking
Network Automation

Benefits

Company-Paid Benefits
Generous Time Off
Stock Purchase Plan
RRSP Program
Flexible Work Hours
Employee Health and Well-Being Programs

Visa sponsorship

Not detected in the job text

Keywords

Enterprise Networking
Network Infrastructure
Enterprise Wi-Fi
Fortinet
FortiGate
FortiManager
FortiAnalyzer
Zscaler
Firewalls
VPN
Routing
Switching
Network Security
DNS
DHCP
VLAN
SD-WAN
OSI Model
Azure
AWS
Hybrid Connectivity
Network Automation
SNMP
Firewall Policies
Access Controls
Network Monitoring
Disaster Recovery
High Availability
Log Analysis
Compliance

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