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Added 10 mins ago
C
Senior Manager, Delivery Portfolio Management (OneStream)
Clearsulting
Toronto, ON
- Full-time
8+ years of consulting or industry experience leading complex finance transformation or enterprise software implementation programs.
Added 40 mins ago
UO
Senior Advanced Research Computing Systems Administrator
University of Victoria
Victoria, BC
- Internship
Reporting to the Manager and Architect of Advanced Research Computing Infrastructure, the Senior Advanced Research Computing Systems Administrator works as part of a team to design, build,…
Added 1 hour 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 2 hours ago
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Senior Applications Architect/Solution Architect
ThoughtStorm
Toronto, ON
- Contract
We are looking for a Senior Applications Architect to support integration between a newly acquired Crew Management solution and planned Rail Maintenance systems.
Added 3 hours ago
LI
IT Enterprise Architect/Strategist
Lotus IT Solutions
Toronto, ON
- Contract
The Ministry of Public and Business Service Delivery and Procurement is seeking a Senior IT Enterprise Architect/Strategist to join the Enterprise Technology & Digital Standards (ETS) team…
Added 4 hours ago
AI
Senior Salesforce Consultant
Aptino, Inc.
Toronto, ON
- $60 to $65 CAD / hour
- Contract
We are seeking an experienced Senior Salesforce Consultant to assess and optimize Salesforce capabilities within a large enterprise environment. The ideal candidate will have deep expertise…
Added 4 hours ago
R
Sr. Salesforce Administrator/ Business Analyst
Recfront
Toronto, ON
- Contract
The Senior Salesforce Administrator / Business Analyst will support and optimize Salesforce Media Cloud as a critical platform for media planning, forecasting, revenue operations, order…
Added 4 hours ago
ES
Expert(e) Réseaux & Sécurité Senior - Senior Network & Security Expert - Montréal
Equans Services Canada & US
Montreal, QC
- Full-time
Equans is looking for a Senior Network & Security Expert at Montreal!
Added 4 hours ago
UC
AI Developer
UniSysTech Consulting
Toronto, ON · Greater Toronto and Hamilton Area, ON
- Other
We are seeking an experienced AI Developer (Mid to Senior Level) to lead the design, development, and deployment of enterprise-grade Artificial Intelligence and Machine Learning solutions.…
Added 4 hours ago
FI
Application Architect
Flexstaf I.T. Inc.
Toronto, ON
- Contract
Experience and knowledge of different integration types including SOA, APIs, web services, real time and batch based, hub and spoke; experience in enterprise service bus implementations
Added 4 hours ago
B
Senior Application Architect
Bevertec
Toronto, ON
- Contract
Experience in developing enterprise architecture deliverables (e.g. models) based on Ontario Government Enterprise Architecture methodologies
Added 4 hours ago
K
Learning Solutions Architect
Kelly
Toronto, ON
- Contract
We are seeking an experienced Learning Solutions Architect to lead the development and execution of innovative learning strategies, programs, and roadmaps within a large enterprise…
Added 4 hours ago
T
Senior IT Enterprise Architect / Strategist
ThoughtStorm
Toronto, ON
- Contract
Hiring: Senior IT Enterprise Architect / Strategist
Added 4 hours ago
B
IT Enterprise Architect/Strategist - Senior (OPS/Federal government experience)
Bevertec
Toronto, ON
- $125 to $130 CAD / hour
- Contract
Job Role: IT Enterprise Architect/Strategist - Senior (OPS/Federal government experience)
Added 4 hours ago
PS
Senior SAP Architect & Delivery Lead
Periscope Search Group
Toronto, ON
- Full-time
You'll own SAP enterprise architecture end to end, across ECC and S/4HANA and everything wired into them: PLM, MES, and the data warehouse. You'll set the architecture strategy and roadmap,…
Added 4 hours ago
XS
Security Analyst / Engineer / Architect
XChange Software Inc
Mississauga, ON
- Contract
Primary focus: Security strategy, enterprise architecture, and executive influence.
Added 4 hours ago
MC
Senior Dynamics 365 F&O Functional Advisor Architect (36149)
Myticas Consulting
Ottawa, ON
- Full-time
We are recruiting a Senior Dynamics 365 Finance & Operations Functional Advisor / Architect to support the continued evolution of a complex enterprise D365 environment.
Added 4 hours ago
T
SAP Customer Solution Director
Talan
Montreal, QC
- $170,000 to $220,000 CAD / year
- Full-time
…response, while technical architecture remains with the Solution Architect or Enterprise Architect and execution, staffing and margin remain with project management and delivery leadership.…
Added 4 hours ago
W
Machine Learning Scientist III - Customer Service AI
Wayfair
Toronto, ON
- $211,914 to $225,158.5 CAD / year
- Full-time
In this role, you will bridge cutting-edge AI research and large-scale enterprise execution - architecting robust, multi-agent frameworks, proprietary domain-adapted LLMs, and end-to-end…
Added 5 hours ago
H
Entreprise Architect - Cybersecurity
Highspring
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time
Highspring is seeking a Enterprise Architect - Cybersecurity to support a complex global environment where information security plays a critical role in protecting business operations and…
Added 5 hours ago
J
Salesforce Technical Architect
Jobgether
Canada
- Full-time
Professional experience: At least 7 years of Salesforce experience, including a minimum of 3 years in an architect-level or senior technical role.
Added 6 hours ago
K
Senior Technical Architect
Kyndryl
Ottawa, ON
- Contract
We're looking for a Senior Technical Architect to support a large-scale enterprise cloud and endpoint modernization initiative.
Added 6 hours ago
AC
Manager, Enterprise Data Platform & Governance
Air Canada Vacations
Montreal, QC
- Full-time
The Manager, Enterprise Data Platform & Governance will lead the team responsible for building, operating, scaling, and securing ACV’s core data infrastructure. In this role, you will be…
Added 8 hours ago
TG
Senior Network Engineer
TMX Group
Toronto, ON
- Full-time
We are seeking a highly skilled and motivated Senior Network Engineer with 7+ years of experience to join our dynamic infrastructure team. In this full-time role, you will be an integral…
Added 8 hours ago
TI
GCP Solutions Architect
Tredence Inc.
Canada
- Full-time
The Solution Architect is the senior technical authority responsible for the end-to-end architectural design, client IT approval, and technical governance of multi-agent AI platforms.…

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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