Network Administrator

Ottawa, ON
On-site
Posted Oct 15, 2026
1 position

$80,000–$100,000 / year

Opens LinkedIn

Employment type: Full-time
Experience level: Mid-level · 3+ years
Minimum education: College diploma
Posting language: English
Working hours: 40 hours per week
Seniority: Mid-Senior level

Job summary

Manage and support enterprise network infrastructure across site, data center, and cloud environments, including Wi-Fi, Fortinet firewalls, VPNs, Zscaler services, routing, switching, and network policies. 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 continuous improvement and compliance.

Job details

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 Related Careers Senior Analyst, Nuclear Safety Analysis Ottawa, ON Saskatoon, SK Toronto, ON Full Time Advanced Technologies Nuclear 2026-10-08 Business Development Executive (Nuclear) Hybrid, CAN Toronto, ON Full Time Advanced Technologies Nuclear 2026-03-18 Primary Care Physician / Médecin de Soins Primaires Ottawa, ON Full Time; Part Time Health Physicians 2026-10-06

What you’ll do

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, along with Zscaler, cloud networking, network security, and strong analytical troubleshooting skills.