Infrastructure System Admin

Toronto, ON
On-site
Posted Oct 1, 2026
1 position

Opens LinkedIn

Employment type: Contract
Experience level: Senior · 5+ years
Minimum education: Professional degree
Posting language: English
Working hours: 40 hours per week
Seniority: Mid-Senior level
Application method: Direct apply is available

Job summary

Lead the design, implementation, security, maintenance, and optimization of IHS and WAS environments, including highly available configurations, upgrades, automation, and capacity planning. Resolve critical middleware issues, collaborate across technical teams, mentor junior administrators, and provide on-call support.

Job details

Description This job posting is for an existing, active vacancy and we are looking to hire strong Infrastructure System Admin. The Senior IHS/WAS Middleware Administrator is a technical leader responsible for the strategic planning, design, implementation, and ongoing management of IBM HTTP Server (IHS) and WebSphere Application Server (WAS) environments. This role requires deep expertise in middleware technologies, security architecture, and high-availability solutions. The Senior Administrator will lead efforts to ensure the stability, scalability, security, and optimal performance of the middleware infrastructure supporting critical business applications. They will also provide mentorship and guidance to junior administrators. Job Title: Infrastructure System Admin Location: Toronto, Ontario Mode: Contract Key Responsibilities: Lead the design, implementation, and maintenance of complex IHS and WAS environments, including clustered and highly available configurations. Develop and enforce middleware standards, policies, and procedures. Provide expert-level troubleshooting and problem resolution for critical middleware issues. Lead performance tuning and optimization efforts to ensure optimal application performance. Design and implement security architectures for IHS and WAS environments, including authentication, authorization, and encryption. Plan and execute middleware upgrades, patching, and migrations. Automate middleware administration tasks using advanced scripting and automation tools. Collaborate with development, infrastructure, security, and architecture teams to define and implement middleware solutions. Mentor and provide technical guidance to junior middleware administrators. Participate in on-call rotation and provide after-hours support as needed. Evaluate and recommend new middleware technologies and tools. Lead capacity planning and performance monitoring initiatives. Qualifications: Bachelor’s degree in computer science or a related field. Extensive experience (7+ years) as a Middleware Administrator, with a strong focus on IHS and WAS. Expert-level knowledge of IHS and WAS architectures, configuration, and administration. Proven experience designing and implementing high-availability and disaster recovery solutions for IHS and WAS. Deep understanding of security principles and best practices for middleware environments. Strong scripting and automation skills (e.g., Python, Jython, Ansible). Experience with monitoring and performance tuning tools (e.g., Dynatrace, AppDynamics, New Relic). Excellent troubleshooting and problem-solving skills. Strong communication and interpersonal skills. Experience with Linux operating systems. IBM Certified System Administrator - WebSphere Application Server Network Deployment or similar certification is highly desirable.

What you’ll do

Requirements

Requires a bachelor’s degree in computer science or a related field and 7+ years of middleware administration experience focused on IHS and WAS. Candidates should have expertise in middleware architecture, high availability, disaster recovery, security, Linux, scripting and automation, monitoring, and performance tuning; an IBM WebSphere certification or equivalent is highly desirable.