Middleware Engineer

About Leidos Australia

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.

Backed by a global organisation of more than 40,000 people, our Australian team of around 2,000 has partnered with government, defence and national security customers for more than 30 years. We deliver mission-critical solutions where reliability, trust and purpose matter.

Leidos is a destination for people who want their work to have purpose, their contribution to be recognised, and their career to grow without needing to fit a single mould. Meaningful work is supported by benefits, flexibility and career pathways that help you grow while balancing life outside work. This includes:

• 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.
• And Much More – These are just a few of the ways we invest in our people and help them thrive.

About the Team

You’ll join a team where people work with integrity, inclusion, innovation, agility, collaboration and commitment. In practice, that means sharing ownership, solving complex problems together and staying connected to the customer context, the purpose behind the work and how each role contributes to meaningful outcomes.

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. Our approach integrates advancing data, AI, cloud, and automation delivering agility, security, efficiency, and innovation at scale.

The Opportunity

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

The role maintains and supports a range of middleware capabilities, which may include Oracle Fusion Middleware, IBM Integration Bus, IBM WebSphere Application Server, Cleo Managed File Transfer, IBM Sterling, and Informatica B2B. The role is not expected to be an expert in every product but should demonstrate experience across relevant enterprise integration technologies and the ability to develop capability in adjacent platforms.

The Senior Middleware Engineer leads middleware lifecycle activities, including installation, configuration, integration, patching, upgrades, certificate management, vulnerability remediation, monitoring, performance optimisation, migration, and end-of-support planning.

The role works closely with application, database, infrastructure, operating system, network, cybersecurity, architecture, service-management, vendor, and business teams to provide secure, reliable, supportable, and integrated services to the customer.

• 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.

About You

We are looking for someone who brings judgement, curiosity and a collaborative approach to work that matters.

• You have experience implementing, administering, maintaining or supporting enterprise middleware, application-hosting, integration, managed file-transfer or B2B platforms. Your experience may span some rather than all of Oracle Fusion Middleware, IBM Integration Bus or App Connect Enterprise, IBM WebSphere Application Server, Cleo, IBM Sterling and Informatica B2B, with the ability to build capability across adjacent technologies.
• You understand enterprise integration concepts including messaging, routing, transformation, orchestration, APIs, adapters, queues, synchronous and asynchronous processing, file-based integration, secure transfer protocols such as SFTP, FTPS, HTTPS and AS2, and B2B partner integration.
• You bring practical knowledge of enterprise Java application hosting, middleware lifecycle management and security, including clustering, Java Virtual Machine configuration, data sources, certificates, encryption, privileged access, service accounts, secrets management, audit logging, patching and vulnerability remediation.
• You understand middleware dependencies across enterprise databases, Windows Server or Red Hat Enterprise Linux, compute, storage, networking, load balancing, DNS, backup, identity, monitoring and security services, with experience supporting services in Azure, AWS, VMware, private cloud or hybrid environments.
• You have experience with scripting or automation using technologies such as PowerShell, Bash, Python, Jython, Ansible or Terraform, and bring a structured approach to monitoring and troubleshooting logs, message flows, transaction failures, connectivity, certificates and performance issues. You can also work collaboratively across multidisciplinary teams while clearly documenting and communicating technical outcomes.

This role requires the successful applicant to be an Australian citizen, hold and be able to maintain a NV-1 security clearance.

If this role interests you, we encourage you to apply. We value different experiences and are interested in the capability and potential you could bring.

Certain roles may be subject International Traffic in Arms Regulations (ITAR) requirements which may limit persons who hold dual nationality with certain proscribed countries from accessing material, or in the case of dual Australian-U.S citizens, may require the candidate to obtain a U.S. Persons Abroad authorisation from the U.S DDTC.

What to Expect When You Apply

Our hiring process is designed to be straightforward, respectful and easy to navigate. If your skills, experience and qualifications look aligned with the role, our Talent Acquisition team will contact you to discuss the next stage. You can expect:

• An initial conversation with our Talent Acquisition team
• An interview with the hiring manager or interview panel

We’ll let you know what to expect before each stage, including who you’ll meet and how to prepare. If you need any adjustments or support during the process, please let us know.

Ready to explore what’s possible?

If this sounds like a role where you can make an impact and continue to grow, we’d like to hear from you. Please apply via the “Apply Now” button with your resume. If you have any questions about the role or recruitment process, please contact [email protected].

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

Pay Range:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.