Senior Middleware Engineer

At Leidos Australia, our work goes beyond a job title. We design, build, operate and support the systems, services and capabilities that help protect and advance the Australian way of life.

You’ll join a team where people work with integrity, inclusion, innovation, agility, collaboration and commitment. The Civil Digital Modernisation business delivers IT services to Australian Federal and State Government departments and agencies to accelerate digital modernisation and ensure secure, resilient, and adaptive environments that meet evolving regulatory, compliance, and business needs.

The Senior Middleware Engineer is responsible for the implementation, operation, sustainment, and continuous improvement of enterprise middleware and integration platforms supporting critical customer services.

Responsibilities:

• Implement, operate, maintain and improve enterprise middleware, application-hosting, integration, managed file-transfer and B2B services across platforms such as Oracle Fusion Middleware, IBM Integration Bus or App Connect Enterprise, IBM WebSphere Application Server, Cleo, IBM Sterling and Informatica B2B.
• Lead middleware lifecycle and sustainment activities including platform implementation, configuration, patching, upgrades, migrations, certificate renewal, licence management, vulnerability remediation, performance optimisation, capacity management and end-of-support planning.
• Work collaboratively across application, database, infrastructure, operating system, network, storage, backup and cybersecurity teams to manage dependencies, application deployments, interfaces, service accounts, data sources, connectivity, certificates and secure integration paths.
• Support reliable end-to-end transactions and integrations by maintaining managed file-transfer and B2B services, monitoring message and transaction flows, investigating failed or delayed transactions, managing partner connectivity and contributing to availability, resilience, backup and recovery arrangements.
• Improve platform supportability through automation, monitoring and observability, while providing senior technical support for complex incidents, leading root-cause analysis, contributing to technical reviews and maintaining accurate platform, interface, certificate, lifecycle and operational documentation.

Requirements:

• Experience implementing, administering, maintaining or supporting enterprise middleware, application-hosting, integration, managed file-transfer or B2B platforms.
• Understand enterprise integration concepts including messaging, routing, transformation, orchestration, APIs, adapters, queues, synchronous and asynchronous processing, file-based integration, secure transfer protocols and B2B partner integration.
• Practical knowledge of enterprise Java application hosting, middleware lifecycle management and security.
• Understanding of middleware dependencies across enterprise databases, Windows Server or Red Hat Enterprise Linux, compute, storage, networking, load balancing, DNS, backup, identity, monitoring and security services.
• Experience with scripting or automation using technologies such as PowerShell, Bash, Python, Jython, Ansible or Terraform.

Benefits:

• Flex Your Way – Tailor work to your life with options including Life Days (up to 12 extra days off per year), part-time arrangements, job sharing, and compressed hours.
• Wellbeing That Matters – Free access to Headspace and MeQuilibrium, plus dedicated wellness spaces to support your mental, physical, and emotional wellbeing.
• Learn Without Limits – Access over 120,000 on-demand courses, alongside technical, project management, leadership, and professional development opportunities.
• Work That Makes an Impact – Contribute to nationally significant projects that matter, solve complex challenges, and accelerate your career through unique growth opportunities.
• Build Your Future – Whether you're deepening technical expertise or preparing for leadership, we'll invest in your development every step of the way.