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Added 30 mins ago
G
Spécialiste en tests de logiciels / Software Test Specialist
Genetec
Sherbrooke, QC
- Full-time
…de développement qui contribue à une solution basée sur le cloud qui gère plus intelligemment les accès physiques dans un contexte de déploiement continu. En collaboration avec d'autres…
Added 30 mins ago
MM
IT Operations and System Specialist
Miltera Machining Research Corp.
Cambridge, ON
- Other
We are seeking a proactive, self-directed IT Operations and System Specialist to own, stabilize, and modernize our technology environment in a fast-paced manufacturing setting. In this…
Added 45 mins ago
M
RQ11527 - Middleware Specialist - Senior
Maarut
Toronto, ON
- Contract
Ability to analyze the results from functional, security,
Added 1 hour ago
Data Center Asset Management, Specialist
Bell
Regina, SK
…deliver advanced solutions in areas such as IoT, Mobility/5G, Cloud, Cyber Security, Voice, Collaboration & Contact Centre and Internet & Private…
Added 1 hour ago
S
Senior Security Analyst
SAP
Toronto, ON
- Full-time
SAP Enterprise Cloud Services is looking for a Senior Security Specialist with a strong technological and security background across the stack. Your focus topic will be Security Incident…
Added 1 hour ago
Senior Technical Specialist
Insurance Corporation of British Columbia
North Vancouver, BC
The Information Services Division is currently looking for a Senior Technical Specialist. In this position, you will provide senior-level technical leadership for the design,…
Added 2 hours ago
W
Regional Sales Director - Identity - Canada
Workday
Toronto, ON · Canada, ON, Toronto
- Full-time
…maximize sales outcomes. Guide your team to collaborate with cloud partners, global system integrators, security ecosystem partners, and technology partners to expand Workday’s relevance…
Added 2 hours ago
W
Account Executive - Identity - Canada
Workday
Toronto, ON · Canada, ON, Toronto
- Full-time
+3 years specifically focused on selling identity governance, identity and access. management, cybersecurity, cloud security, enterprise platform, data, AI governance, or related solutions…
Added 2 hours ago
MD
Information Technology Specialist 5 - Unified Communications & Collaboration Architect
Minnesota Direct Care and Treatment
Saint-Paul, NB · St.-Paul, NB
- Full-time
Job Class: Information Technology Specialist 5
Added 3 hours ago
W
Regional Sales Director - Identity - Canada
Workday
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…maximize sales outcomes. Guide your team to collaborate with cloud partners, global system integrators, security ecosystem partners, and technology partners to expand Workday’s relevance…
Added 3 hours ago
B
Business Intelligence Specialist
Bevertec
Toronto, ON
- Contract
This is a hands-on role responsible for ensuring the stability, security, performance, and availability of a business-critical data platform that supports analytics, reporting, data…
Added 3 hours ago
W
Account Executive - Identity - Canada
Workday
Toronto, ON · Greater Toronto Area, Canada
- Full-time
+3 years specifically focused on selling identity governance, identity and access. management, cybersecurity, cloud security, enterprise platform, data, AI governance, or related solutions…
Added 4 hours ago
M
Specialist, Data Governance and Strategy
Moneris
Toronto, ON
- Full-time
Partner with Data Engineering, Architecture, Security, and business teams to embed governance capabilities into data products and pipelines.
Added 4 hours ago
Level 2 IT Support Technician
Quadbridge
Montreal, QC
Technical Customer Support Specialist – Level 2
Added 4 hours ago
I
Senior IT Solutions Architect – Presales
ITI
Halifax, NS · Greater Halifax Metropolitan Area
- Full-time
This is a client-facing role for someone with broad expertise across cloud, data centre infrastructure, networking and cybersecurity who enjoys connecting technology to real business needs.
Added 8 hours ago
NB
CHIEF DEVELOPER FULLSTACK - PYTHON
National Bank of Canada
Montreal, QC
- Full-time
…Delivery – Capital Markets team at National Bank means acting as a specialist in software development and cloud solutions. This role allows you to have a direct impact on critical…
Added 13 hours ago
D
Senior AI & Cyber Defense Specialist
Darktrace
Canada
- Full-time
…networking, common network protocols, network and endpoint security, cloud environments, identity, email security, threats and vulnerabilities, security monitoring, threat detection,…
Added 13 hours ago
IS
Atlassian Specialist
InSync Systems
AB · Greater Edmonton Metropolitan Area
- Contract
We are seeking an experienced Atlassian Specialist with strong expertise in Confluence and the broader Atlassian ecosystem. The successful resource will provide technical expertise in the…
Added 14 hours ago
SPECIALIST CYBER DIPLOMACY & GOVERNANCE (BUSINESS STRATEGY & PLANNING)
City of Toronto
Toronto, ON
A key responsibility of the role is supporting the Manager in the administration and oversight of cyber security vendor agreements, ensuring compliance with contractual obligations, service…
Added 14 hours ago
TC
Oracle Integration Cloud (OIC) Developer
The Citco Group Limited
Toronto, ON
- Full-time
Certified Oracle Integration Cloud Specialist
Added 14 hours ago
M
Sr. Network Security Specialist
McKesson
Mississauga, ON
- Full-time
McKesson is seeking a Senior Network Security Specialist to design and advance secure, resilient, and scalable network infrastructure across enterprise, hybrid-cloud, and on-premises…
Added 16 hours ago
LI
Data Analytical Specialist/Scientist
Lotus IT Solutions
Toronto, ON
- Contract
…Delivery and Procurement) is seeking a Senior Data Analytical Specialist/Scientist to join their team in Toronto. The successful consultant will lead the development and delivery of…
Added 16 hours ago
LI
Systems Testing/QA Specialist
Lotus IT Solutions
Toronto, ON
- Contract
The Ministry of Public and Business Service Delivery and Procurement is seeking a Senior Systems Testing/QA Specialist to support the Labour and Transportation Cluster. The successful…
Added 17 hours ago
TH
Business Support Specialist
Tom Harris Cellular
Pitt Meadows, BC
- Full-time
We're looking for a motivated Business Support Specialist to join our high-performing team at Tom Harris Cellular!
Added 17 hours ago
E
AI DevOps Specialist (AI Enablement & Secure DevOps)
Experis
Canada
- Contract
This specialist will bridge the gap between AI development pipelines, secure networking infrastructure, and cloud platform services. They will take a hands-on lead in configuring…

McKesson

Sr. Network Security Specialist

Mississauga, ON, Canada

$99,100 - $132,100 · Full-time

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Job details

Pay: $99,100 - $132,100
Job type: Full-time
Experience: 7+ years of professional experience in network engineering, including experience with network architecture, security design, or enterprise infrastructure strategy.
Posting language: English
Posted: Oct 30, 2026

Original job description

McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well-being of you and those we serve – we care.

What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patients, our communities, and our people. If you want to be part of tomorrow’s health today, we want to hear from you.

About the Role

McKesson is seeking a Senior Network Security Specialist to design and advance secure, resilient, and scalable network infrastructure across enterprise, hybrid-cloud, and on-premises environments. In this senior individual-contributor role, you will shape network security architecture, establish technical standards, and reduce attack surfaces through Zero Trust, segmentation, and secure access strategies.

You will partner with Security, Enterprise Architecture, Infrastructure, and business stakeholders to translate operational and regulatory needs into practical security designs. You will also evaluate emerging technologies, lead architecture reviews, strengthen network visibility, and help ensure critical connectivity services remain secure, available, and positioned for business growth.

What You’ll Do

Design secure network architectures for hybrid-cloud and on-premises environments using Zero Trust, network segmentation, micro-segmentation, and secure-by-design principles.

Lead network security architecture reviews, risk assessments, design validation, and the development of reusable security patterns and standards.

Architect and optimize firewall and perimeter security capabilities, including Palo Alto Networks, Zscaler, HPE Aruba EdgeConnect, secure internet gateways, and web proxy solutions.

Design secure workforce and device access solutions using Zero Trust Network Access, VPN technologies, Network Access Control, and identity-aware security controls.

Strengthen threat detection through network traffic analysis, IDS/IPS technologies, security monitoring, telemetry, and security analytics.

Evaluate technologies, proofs of concept, and vendor solutions to inform network security roadmaps and investment decisions.

Partner with Security, Enterprise Architecture, Infrastructure, and operations teams to improve resilience, regulatory alignment, and business continuity.

Provide technical leadership during complex incidents, conduct root cause analysis, and implement sustainable corrective actions and automation.

Basic Requirements

7+ years of professional experience in network engineering, including experience with network architecture, security design, or enterprise infrastructure strategy.

Demonstrated experience designing and implementing secure enterprise networks across hybrid-cloud and on-premises environments.

Hands-on experience with enterprise firewall technologies, including policy design, configuration, administration, and optimization.

Experience applying Zero Trust, network segmentation, micro-segmentation, or secure network design principles.

Experience with routing, switching, and network protocols such as TCP/IP, BGP, OSPF, MPLS, or SD-WAN.
Experience producing architecture diagrams, design standards, technical documentation, or security review findings.

Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field, or an equivalent combination of education and relevant experience.

Preferred Skills/Experience

Experience with Palo Alto Networks, Zscaler, and HPE Aruba EdgeConnect.
Experience with network traffic analysis, IDS/IPS, security analytics, and incident investigation.
Experience with secure access technologies such as ZTNA, VPN, NAC, secure internet gateways, or web proxies.

Knowledge of regulatory, compliance, or security-control frameworks in a regulated enterprise environment.

Experience with cloud networking and cloud security architecture.

Automation or orchestration experience using Ansible, Python, APIs, or infrastructure-as-code practices.

Experience conducting vendor assessments, proofs of concept, capacity planning, and technology roadmap development.

Relevant certifications such as PCNSE, CISSP, CCNP Security, CCIE Security, or vendor-specific cloud or security credentials.

Ability to explain complex security risks and architecture decisions clearly to technical and nontechnical stakeholders.

Travel, Work Environment, and Physical Requirements

Work location, in-office expectations, and travel requirements will be defined based on the approved position and team needs. The role primarily involves computer-based architecture, documentation, collaboration, and technical analysis. Any position-specific physical requirements or accommodations should be included in the final approved posting.

We are proud to offer a competitive compensation package at McKesson as part of our Total Rewards. This is determined by several factors, including performance, experience and skills, equity, regular job market evaluations, and geographical markets. The pay range shown below is aligned with McKesson's pay philosophy, and pay will always be compliant with any applicable regulations. In addition to base pay, other compensation, such as an annual bonus or long-term incentive opportunities may be offered. For more information regarding benefits at McKesson, please click here.

Our Base Pay Range for this position

$99,100 - $132,100

McKesson has become aware of online recruiting-related scams in which individuals who are not affiliated with or authorized by McKesson are using McKesson’s (or affiliated entities, like CoverMyMeds or RxCrossroads) name in fraudulent emails, job postings or social media messages. In light of these scams, please bear the following in mind:

McKesson Talent Advisors will never solicit money or credit card information in connection with a McKesson job application.

McKesson Talent Advisors do not communicate with candidates via online chatrooms or using email accounts such as Gmail or Hotmail. Note that McKesson does rely on a virtual assistant (Gia) for certain recruiting-related communications with candidates.

McKesson job postings are posted on our career site: careers.mckesson.com.

McKesson is an Equal Opportunity Employer

McKesson provides equal employment opportunities to applicants and employees, without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, age, genetic information, or any other legally protected category. For additional information on McKesson’s full Equal Employment Opportunity policies, visit our Equal Employment Opportunity page.

McKesson is committed to being an Equal Employment Opportunity Employer and offers opportunities to all job seekers including job seekers with disabilities. If you need a reasonable accommodation to assist with your job search or application for employment, please contact us by sending an email to (United States) Disability_Accommodation@McKesson.com or (Canada) Accessibility@mckesson.ca. Resumes or CVs submitted to this email box will not be accepted.

Join us at McKesson!

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More about this job

Responsibilities

Design and advance secure, resilient, and scalable network infrastructure across enterprise, hybrid-cloud, and on-premises environments. Lead network security architecture reviews, risk assessments, and the development of reusable security standards.

Requirements

Requires 7+ years of professional experience in network engineering, security design, or enterprise infrastructure strategy. Candidates must have a bachelor's degree in a related field or an equivalent combination of education and experience.

Skills

Network security architecture
Zero Trust
Network segmentation
Firewall administration
Palo Alto Networks
Zscaler
HPE Aruba EdgeConnect
Hybrid-cloud security
Network protocols
Threat detection
IDS/IPS
Security analytics
Identity-aware security
Risk assessment
Technical leadership

Benefits

Annual bonus
Long-term incentive opportunities

Visa sponsorship

Not detected in the job text

Keywords

Network Security
Zero Trust
Hybrid-cloud
Segmentation
Micro-segmentation
Palo Alto Networks
Zscaler
HPE Aruba EdgeConnect
VPN
ZTNA
NAC
IDS/IPS
TCP/IP
BGP
OSPF
MPLS
SD-WAN
Ansible
Python
Infrastructure-as-code
PCNSE
CISSP
CCNP Security
CCIE Security
Network Engineering
Security Architecture
Risk Assessment
Regulatory Compliance
Business Continuity
Automation

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