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Added 13 mins ago
TH
Administrative Co-Ordinator- Department of Diagnostic and Interventional Radiology
The Hospital for Sick Children
Toronto, ON
- Full-time
…healthcare centres in the world. As innovators in child health, we lead and partner to improve the health of children through the integration of healthcare, leading-edge research and…
Added 13 mins ago
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Associate Director – Commodity Local Market Risk
RBC
Toronto, ON
- Full-time
…changes and market conditions to deliver actionable insights for senior…
Added 28 mins ago
RC
Senior SIS Engineer
Randstad Canada
Vancouver, BC
- $140,000 to $180,000 CAD / year
- Full-time
-Act as technical lead for SIS and BMS capital projects and provide technical guidance throughout project execution.
Added 28 mins ago
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Senior AI & Cyber Defense Specialist
Darktrace
Canada
- Full-time
Lead technical enablement engagements in English and support multilingual audiences across the Americas, including demonstrations, workshops, practical exercises, scenario-based sessions…
Added 28 mins ago
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Senior HSEQ Advisor
Sedgman
Vancouver, BC
- Full-time
You're an experienced HSEQ professional who combines strong technical knowledge with practical judgement and the confidence to operate independently across multiple projects and business…
Added 28 mins ago
AI
Business Project Manager, financial field
Avanciers Inc.
Montreal, QC
- $90 to $100 CAD / hour
- Contract
Executive Steering Committee Reporting: Lead governance cadence by preparing and presenting milestone progress, financial health, risk mitigation strategies, and critical decision items…
Added 42 mins ago
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Production Designer
BrandActive
Toronto, ON
- $52,500 to $78,500 CAD / year
- Contract
Reporting to the Senior Application Designer, the Production Designer (6 month contract) is responsible for the preparation of artwork, renderings and design documentation. The Production…
Added 42 mins ago
J
Chief Solution Architect (Pre-sales, AI + Data Transformation)
Jobgether
Canada
- Full-time
…opportunities. In this role, you will work at the intersection of technical architecture, business strategy, and consultative sales, helping enterprise organizations unlock the full…
Added 1 hour ago
EN
Principal Wireless SW Engineer
Extreme Networks
Toronto, ON
- Full-time
The Principal Wireless Software Engineer is a senior technical leader responsible for resolving the most complex and business-critical customer issues escalated through the Global Technical…
Added 1 hour ago
SPECIALIST CYBER DIPLOMACY & GOVERNANCE (BUSINESS STRATEGY & PLANNING)
City of Toronto
Toronto, ON
The Specialist, Cyber Diplomacy & Governance provides senior-level technical and business advice, support, and services to City divisions, agencies, and corporations on cyber security…
Added 2 hours ago
BT
Senior Manager Level 3
Baker Tilly Canada
Owen Sound, ON
- Full-time
We are looking for a Senior Manager Level 3 to join our team - a role where your expertise will drive meaningful outcomes and your ambition will help shape what comes next. Here, you’ll…
Added 2 hours ago
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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 Buyer
Airbus Helicopters
Fort Erie, ON
- Full-time
The Senior Buyer reports to the Purchasing Manager and is responsible for proactively maintaining the movements of materials from suppliers to ensure uninterrupted deliverables to all…
Added 3 hours ago
GC
Coordinator, Maintenance (Temporary)
Glencore Canada
Sparwood, BC
- $115,600 CAD / year
- Temporary
Reporting to the Superintendent or Senior Lead, Maintenance, this role is responsible for coordinating maintenance activities across key mining and processing assets while supporting the…
Added 3 hours ago
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Coordinator, Maintenance (Temporary)
Glencore
Sparwood, BC
- $115,600 CAD / year
- Temporary
Reporting to the Superintendent or Senior Lead, Maintenance, this role is responsible for coordinating maintenance activities across key mining and processing assets while supporting the…
Added 3 hours ago
EV
Coordinator, Maintenance (Temporary)
Elk Valley Resources
Sparwood, BC
- $115,600 CAD / year
- Full-time
Reporting to the Superintendent or Senior Lead, Maintenance, this role is responsible for coordinating maintenance activities across key mining and processing assets while supporting the…
Added 3 hours ago
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Director of Accounting
BlueCat
Toronto, ON
- Full-time
You will own day-to-day accounting operations, including the close, technical accounting, and audit readiness. You will lead a team of 9 (3 direct reports) and play a central role in…
Added 4 hours ago
LI
IT Enterprise Architect/Strategist
Lotus IT Solutions
Toronto, ON
- Contract
Lead Application Portfolio Management activities including value analysis, lifecycle management, technical debt assessment, and vendor viability reviews
Added 4 hours ago
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Director of Accounting
BlueCat
Canada
- Full-time
You will own day-to-day accounting operations, including the close, technical accounting, and audit readiness. You will lead a team of 9 (3 direct reports) and play a central role in…
Added 4 hours ago
J
Manager, Technical Services
Jobgether
Canada
- Contract
Lead and scale a growing technical services function within a customer-focused organization supporting complex enterprise technology environments. As the first dedicated Manager of…
Added 4 hours ago
WN
Senior Mechanical Engineer
W3 North America
Toronto, ON · Greater Toronto and Hamilton Area, ON
- $140,000 to $160,000 CAD / year
- Full-time
Lead and mentor a small engineering team of 3 to 4 engineers, designers and application staff.
Added 4 hours ago
I
Senior Technology Designer
Introba
Vancouver, BC
- Full-time
The Senior Technology Designer provides technical leadership for the design and delivery of building technology systems, including communications, audio-visual, electronic security,…
Added 4 hours ago
J
Senior Account Manager, Media
Jobgether
Canada
- Full-time
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Account Manager, Media based in Canada.
Added 4 hours ago
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Senior Structural Engineer
WalterFedy
Calgary, AB
- Full-time
Are you a seasoned structural engineer ready to take on complex challenges and lead impactful projects across our building sectors? We’re looking for a Senior Structural Engineer to join…
Added 4 hours ago
M
Responsable de comptes stratégiques - Secteur minier / Strategic Account Executive - Mining
Microsoft
Montreal, QC
- Full-time
You will partner with senior business and technology leaders, working across Microsoft’s sales, technical and partner ecosystem to deliver innovative solutions that support the customer's…

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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