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Added 15 hours ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Server-side languages: C#/.NET, Java, Python, PHP
Added 15 hours ago
RC
Senior Data Engineer
RSM Canada
Calgary, AB
- Full-time
Added 15 hours ago
O
Tutor Physics - Topics Online Classes
Odtutor
ON · Ontario, Canada
- Contract
…provides courses in programming and analytics tools including Python, SQL, Tableau, Power BI, and PHP. The organization focuses on delivering flexible, high-quality instruction tailored to…
Added 15 hours ago
CT
Lead/Senior Data Engineer
Celebal Technologies
Ottawa, ON
- Contract
Design, develop, test, and maintain scalable ETL/ELT pipelines using Databricks, Spark, SQL, Python, and AWS.
Added 15 hours ago
EN
Principal Wireless SW Engineer
Extreme Networks
Toronto, ON
- Full-time
Added 15 hours ago
HT
Software Validation Technologist
Husky Technologies
Bolton, ON
- Full-time
Experience with C# compliant languages such as C, Java, and Python -Experience with Modbus , Ethernet, EtherCAT
Added 15 hours ago
S
Product Specialist - Risk and Performance
SimCorp
Toronto, ON
- Full-time
Basic programming data manipulation skills in SQL, Excel, Python, Java, C#
Added 16 hours ago
R|
Programmer
RI-MUHC | Research Institute of the MUHC | #rimuhc
Montreal, QC
- Full-time
Proficiency in Python and/or other relevant programming or scripting languages.
Added 16 hours ago
IG
Network Operations Engineer
Insight Global
Vancouver, BC
- $65 to $75 CAD / hour
- Contract
As a Platform Engineer, Network Operations you will design and build internal developer platforms and core infrastructure independently that enable engineering velocity and operational…
Added 16 hours ago
B
Software Engineer - GPU Networking & Distributed Systems
Baseten
Montreal, QC
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Infrastructure
Baseten
Montreal, QC
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Voice AI (Inference Runtime)
Baseten
Montreal, QC
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Dedicated Inference
Baseten
Montreal, QC
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Model Performance Systems
Baseten
Montreal, QC
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
MN
Client Data Analyst II
Mosaic North America
Toronto, ON
- Full-time
Utilize statistical and analytical software such as Python, R, SQL, and visualization tools to conduct analyses and communicate results.
Added 16 hours ago
B
Software Engineer - Infrastructure
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Dedicated Inference
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Forward Deployed Engineer
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - GPU Networking & Distributed Systems
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
B
Software Engineer - Voice AI (Inference Runtime)
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
MN
Client Data Analyst II
Mosaic North America
Mississauga, ON
- Full-time
Utilize statistical and analytical software such as Python, R, SQL, and visualization tools to conduct analyses and communicate results.
Added 16 hours ago
B
Software Engineer - Model Performance Systems
Baseten
Toronto, ON
- $165,000 to $330,000 USD / year
- Full-time
…applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing…
Added 16 hours ago
M
Sr. Network Security Specialist
McKesson
Mississauga, ON
- Full-time
Automation or orchestration experience using Ansible, Python, APIs, or infrastructure-as-code practices.
Added 17 hours ago
Sr. Network Designer
Rogers Communications
Brampton, ON · Toronto, ON
Working knowledge of Python, SQL, shell scripting, Power BI or equivalent BI tools, network performance platforms, and large-scale operational datasets.
Added 17 hours ago
AC
Senior Actuarial Analyst, High Net Worth Pricing
Aviva Canada
Markham, ON
- Full-time
Leverage tools such as Earnix, Python, SAS, SQL, and Excel to perform advanced analyses and automate pricing processes.

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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