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Added 9 mins ago
R
Director, Enterprise Integration Services – OneRBC: CNB Integration
RBC
Toronto, ON
- Full-time
…identity & access management, cloud infrastructure, network architecture, security posture alignment, and modern workplace modernization. You'll own the validation and de-risking of…
Added 25 mins ago
T
Software Engineer II - Angular UI
TD
Toronto, ON
- Full-time
Document and verify system components, applications, system infrastructure, security, integration, operability and engineering related architecture designs associated with a program or…
Added 25 mins 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 25 mins ago
C
Senior Java Developer - Vice President
Citi
Mississauga, ON
- Full-time
…Working within a global engineering environment, you will drive architecture decisions for new applications, influence technical direction and raise the bar on coding and security…
Added 25 mins ago
AG
Salesforce Platform Developer
Altus Group
Toronto, ON
- Full-time
…secure, maintainable solutions, working closely with Salesforce architecture, product, delivery, and business teams. Your work will span hands-on development, platform integrations,…
Added 25 mins ago
P/
Solutions Architect
PrecisionERP / PrecisionIT
Toronto, ON
- $100 to $110 CAD / hour
- Contract
Ensure application architecture aligns with enterprise standards, security, scalability, and performance requirements.
Added 25 mins ago
B
Frontend Developer-React/Nextjs
BeachHead
Toronto, ON
- $65 to $70 CAD / hour
- Contract
Apply appropriate security and accessibility considerations throughout the development lifecycle.
Added 25 mins ago
US
Adobe CDP Architect
United Software Group Inc
Vancouver, BC
- $100 to $110 CAD / hour
- Contract
Own the Adobe Real-Time CDP architecture, including schemas, identity namespaces, ingestion patterns, consent, governance, segmentation, and activation.
Added 25 mins ago
I
Senior IT Solutions Architect – Presales
ITI
Halifax, NS · Greater Halifax Metropolitan Area
- Full-time
…Solutions Architects and report to the Director, IT Solutions Architecture within our Sales business…
Added 25 mins ago
A
Senior Python Backend Engineer
Apexon
Toronto, ON
- $120,000 to $150,000 CAD / year
- Contract
…system design, backend integrations, performance optimization, security, and…
Added 25 mins ago
ZS
Senior Data Warehouse Engineer
Zodiac Solutions, Inc
Toronto, ON
- Full-time
Redesign ingestion, transformation, and consumption patterns from HDFS-based architecture to cloud object storage and Delta Lake
Added 25 mins ago
GS
Observability Engineer
Gala Solutions
Montreal, QC
- Contract
…collaborate with software developers, SRE, infrastructure, and security teams to drive automation and implement best-in-class observability solutions supporting both development and…
Added 54 mins ago
AS
Technical Lead - AI Delivery
Ardent SoftSol Inc.
Brampton, ON
- Contract
They will possess deep expertise in Oracle AI Agent Studio, Oracle Fusion Cloud Applications, AI architecture, GenAI technologies, and enterprise integration patterns. This individual will…
Added 54 mins ago
IG
DevOps Engineer | Azure + GitHub Enterprise
Insight Global
Toronto, ON
- $62.86 to $68.75 CAD / hour
- Contract
Standardize DevOps practices, pipeline architecture, and release processes across development teams
Added 54 mins ago
A
Solution Architecture Advisor
Alithya
QC · QC, Canada
- Full-time
En tant que conseiller ou conseillère en architecture de solutions, vous concevrez des solutions technologiques répondant aux besoins d’affaires tout en respectant les orientations cibles,…
Added 54 mins ago
P
Workforce Transformation Manager (HR Transformation)
PwC
Ottawa, ON
- Full-time
…technologies), Workforce Planning, People Analytics & Insights, Job Architecture, Skills Management, Integrated Talent Management, and AI in…
Added 1 hour ago
C
AVP Senior Java Developer
Citi
Mississauga, ON
- Full-time
Recommend and develop security measures in post implementation analysis of business usage to ensure successful system design and functionality
Added 1 hour ago
AM
Sr. Systems Design Engineer
Advanced Micro Devices, Inc
Markham, ON
- Full-time
…execution, validation, silicon bring-up and debug of AMD processor security sub-systems, while working closely with internal teams to meet product development…
Added 1 hour ago
M
People Services AI Solutions & Configuration Lead
Manulife
Toronto, ON · Waterloo, ON
- Full-time
…You will partner across HR, technology, advanced analytics, architecture, governance, and product teams to design, configure, optimize, and continuously improve AI-enabled People Services…
Added 1 hour ago
CO
Project Manager - AI Building and Zoning Review
City of Niagara Falls
Niagara Falls, ON
- $54.58 to $68.22 CAD / hour
- Contract
Added 1 hour ago
ZC
Engineering Lead
Zaya Care
Toronto, ON
- Full-time
Own the long-term technical vision and roadmap, setting technical direction, evolving the architecture, and making the tradeoffs needed to balance near-term delivery with scalability,…
Added 1 hour ago
Solution Architect III, Platform, FSI, Google Cloud
Google
Toronto, ON
10 years of experience with cloud native architecture in a customer-facing or support role.
Added 1 hour ago
Platform Solution Architect III, Google Cloud
Google
Calgary, AB · Vancouver, BC
10 years of experience with cloud native architecture in a customer-facing or support role.
Added 1 hour ago
N
Solutions Architect
NULogic
Canada
- Contract
Mentor team members and ensure adherence to architecture, security, performance, and integration standards.
Added 1 hour ago
FI
Backup Administrator
FP Inc.
Toronto, ON · Scarborough, ON
- $60 to $70 CAD / hour
- Contract
2+ years of experience with architecture, deployment, or operational support of VMware vSphere Hypervisor and Red Hat OpenShift Virtualization.

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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