Linux engineer Jobs in Mississauga, ON

Job Title: Linux and Middleware Administrator

Location: Mississauga
Employment Type: Full-time

Reason for Vacancy: Replacement

Work Arrangement: Hybrid
Department Name: Infrastructure Services

Pay Typed: Salaried

Pay Range: $80,000 - $95,000 annually

Please note that this is a general posting range and offer range will be varied based on relevant experience, qualifications, skills required and location for this role.

About Us

Express Scripts Canada (ESC) is the leader in health benefits management. Serving over 12 million members, we help insurance carriers, third party administrators, and the public sector optimize the value of health benefits by linking the talent and professional expertise of our people with leading edge

information management systems and technology. Express Scripts Canada is a wholly owned subsidiary of Express Scripts, one of the largest pharmacy benefit management (PBM) companies in North America, part of The Cigna Group (NYSE: CI), a global health company. Together, we deliver innovative,

cost-effective solutions that improve access, affordability, and health outcomes for Canadians.

Job Summary

Express Scripts Canada is looking for a Linux and Middleware Administrator to be part of the Infrastructure Engineering team. The primary objective of the Incumbent will be to work as a member of the Technology Services Teams working closely with Business stakeholders, Project Managers, IS

Management to understand processes and business requirements and translate them into Environment technology solutions.

Key Responsibilities:

• Perform the Linux and Middleware system lifecycle management, including system upgrade, capacity planning and disaster recovery test on legacy RedHat Linux and OpenShift environments.

• Install, configure, and maintain Linux servers (RHEL) in physical and virtual environment (VMware)

• Implement and maintain Linux system security, including OS patching, hardening, and vulnerabilities remediation by following the standard procedures

• Automate routine administrative tasks using Ansible or Python scripting for Linux system deployment, administration and support

• Monitor Linux system performance and troubleshooting issues across infrastructure systems and applications

• Collaborate with solution development and application teams to ensure comprehensive test plans are developed and testing scripts are maintained from business specifications and ensure that defects and fixes across prioritized systems are documented, tracked and closed in conjunction with business priorities

• Maintain documentation for system deployment, builds, procedure and configuration

• Manage and support VEEAM backup system for Linux servers and Oracle databases

• Participate in on-call rotation and provide after-hours support for critical systems

What We’re Looking For

• Post-secondary degree in computer science, information technology, or computer engineering.

• 3+ years of hands-on experience in RedHat Linux system administrator

• 2+ years of working experience as a VMware system administrator

• 1+ years of hands-on experience with RedHat OpenShift cluster administration

• 1+ year of VEEAM experience

• Strong experience with RedHat Enterprise Linux (RHEL v8 and v9), or other enterprise Linux distributions.

• Working knowledge of RedHat Satellite and Identity Management (IdM) administration and support

• Working experience with VMware vSphere, vCenter server, DRS, HA, or other virtualization platforms

Why Join Us

• Competitive compensation, benefits and pension plan

• Career development and advancement opportunities

• A culture that celebrates innovation and collaboration

• Flexible work options and wellness programs

Pre-Employment Requirements

All offers of employment are conditional upon the successful completion of reference checks and background verification in accordance with company policy. Within ESC, for certain positions, obtaining and maintaining a federal government security clearance is a bona fide occupational requirement. Candidates applying for such roles must meet all eligibility criteria for the applicable clearance level and consent to the security screening process as mandated by federal regulations. Failure to obtain or maintain the required clearance will result in withdrawal of the offer or termination of employment.

Our hiring process includes AI-powered tools to conduct video interviews, take notes and score candidates; however, all scores will be reviewed by hiring managers and our Talent team before making a decision.

NOTE: Internal candidates should apply before March 18, 2026.

Express Scripts Canada is a Cigna company

Express Scripts Canada is a subsidiary of Express Scripts, a Cigna company. Cigna Corporation (NYSE: CI) is a global health service company dedicated to improving the health, wellbeing and peace of mind of those we serve. Cigna offers an integrated suite of health services through Cigna, Express Scripts, and our affiliates including medical, dental, behavioural health, pharmacy, vision, supplemental benefits, and other related products.

About Express Scripts Canada

Express Scripts Canada is a leading health benefits manager and has been recognized as one of the most innovative. Our clients include Canada's leading insurers, third party administrators and governments. We work with these clients to develop industry-leading solutions to deliver superior healthcare in a cost-controlled environment. We provide Active Pharmacy™ services to more than 7 million Canadian patients and adjudicate more than 100 million pharmacy, dental, and extended health claims annually. Through our proprietary consumer intelligence, clinical expertise, and patients-first approach, we promote better health decisions for plan members, while managing and reducing drug benefit costs for plan sponsors.

It will be a condition of employment that the successful candidate obtains an Enhanced Reliability Clearance from the Federal Government. The candidate will be required to provide supporting documentation to receive clearance if required.

We offer a competitive salary and benefits package, along with a positive work environment built on solid corporate values, integrity, mutual respect, collaboration, passion, service and alignment.

We are an equal opportunity employer that promotes a diverse, inclusive and accessible workplace. By embracing diversity, we build a more effective organization that empowers our employees to be the best that they can be.

We are committed to creating a working environment that is barrier-free and we are prepared to provide accommodation for people with disabilities.

If you require accommodation in completing the online application process, please email: Do not email for an update on your application or to provide your resume as you will not receive a response.