Senior System Administrator Infrastructure Engineer

Job Description Overview We are seeking an experienced Infrastructure Engineer / System Administrator to manage, maintain, and enhance enterprise infrastructure environments across on-premises and cloud platforms. The successful candidate will be responsible for supporting infrastructure operations, system deployments, configuration management, and operational readiness while ensuring the availability, security, and performance of critical IT systems. This role requires strong expertise in server administration, infrastructure technologies, automation, and system design, along with the ability to collaborate effectively with cross-functional teams to deliver reliable and scalable infrastructure solutions. Your Role and Responsibilities Configure, administer, and maintain infrastructure across on-premises and cloud environments. Support infrastructure deployment, integration, and operational readiness activities. Install, configure, upgrade, and decommission Linux and/or Windows server environments. Create, maintain, and update system build documentation, configuration baselines, and operational procedures. Monitor infrastructure health, availability, capacity, and performance to ensure reliable service delivery. Implement infrastructure maintenance, upgrades, and system improvements in line with organisational standards. Troubleshoot and resolve infrastructure, server, networking, and platform-related issues. Automate infrastructure provisioning, deployment, and maintenance using appropriate tools and scripting. Collaborate with technical teams to support system integration, testing, and implementation activities. Contribute to disaster recovery planning, operational acceptance, and infrastructure resilience initiatives. Ensure infrastructure solutions comply with security, operational, and governance requirements. Provide technical guidance and recommendations to support continuous infrastructure improvement Requirements What We’re Looking For We’re looking for candidates with a combination of the following: Demonstrated experience managing and improving infrastructure availability, performance, and service continuity. Experience supporting disaster recovery planning, testing, and implementation to ensure business continuity. Strong expertise in IT infrastructure administration, including servers, networking, storage, virtualisation, and cloud technologies. Experience implementing infrastructure maintenance, upgrades, and operational support using industry best practices. Proficiency in infrastructure automation through scripting and infrastructure management tools. Ability to monitor infrastructure performance, investigate operational issues, and implement effective resolutions. Experience designing scalable, secure, and resilient infrastructure solutions that balance business and technical requirements. Ability to evaluate design options, assess technical risks, and recommend appropriate infrastructure solutions. Experience leading or supporting system installation, migration, upgrade, and decommissioning activities. Strong knowledge of configuration management, system documentation, operational procedures, and infrastructure standards. Excellent problem-solving, stakeholder communication, and technical documentation skills. Ability to work collaboratively within cross-functional technical teams in a complex enterprise environment. Benefits What We Offer: Tools, training, and freedom to grow – We equip you with the resources and flexibility to succeed on your terms. Focused career development – Through mentorship, hands-on experience, and structured learning, we help you build the skills and mindset to thrive. Inclusive and supportive culture – We value every individual’s unique perspective and are committed to fostering a workplace where everyone feels seen, heard, and appreciated. Flexible work options – Enjoy the benefits of hybrid or remote work arrangements that support your lifestyle and productivity. Opportunities to work on impactful projects – Collaborate with industry leaders and clients on cutting-edge technologies and meaningful work. Recognition and rewards – We celebrate contributions and achievements regularly, ensuring your efforts never go unnoticed. Well-being and work-life balance – We care about your holistic well-being, with initiatives and policies that promote balance, wellness, and fulfilment. Why Tritusa? Tritusa is a globally trusted consulting company specialising in Quality Engineering & Assurance, SAP S/4HANA Test Consulting, Test Automation & DevOps, Performance Testing & Engineering, Cybersecurity Testing, and SAP S/4HANA Technical Services. We were founded in 2011, and we’re committed to continually building a safe and respectful workplace where all our people feel appreciated and accepted. Through the creation of endorsed employee-led diversity networks which promote culture, disability, LGBTI+, Aboriginal, and Torres Strait Islander people and gender equality, we’re leading the way to shape an environment where everybody can thrive. Tritusa has a strong and growing footprint across key regions. Headquartered in Sydney, Australia, we also operate offices in Canberra, Melbourne, and Brisbane. Internationally, we have a presence in the United States through our office in Delaware, along with offshore delivery centres in Chennai, India, and Colombo, Sri Lanka. This global network allows us to provide our clients with scalable solutions, seamless collaboration, and round-the-clock delivery capability. We’re a company that values diversity and inclusion, and we want to make sure everyone feels included. We believe that this is one of the biggest factors in creating an environment where people can thrive, innovate and be their best selves. We at Tritusa believe in fostering an inclusive environment that welcomes and supports one another. We look out for each other and prioritise respect, fairness, development, and well-being. All qualified applicants will receive consideration for employment regardless of their background, experience, identity, ability or thinking style. If you're looking for a great place to work and grow, you might be the perfect fit for our team. What you need to do now If this sounds like you, please apply to this role by clicking the ‘Apply’ link below and submitting your resume. Alternatively, you can share your CV directly with us at [email protected] Please allow 1-2 weeks for us to review all applications. You'll get an update on your application status. If you progress to the next stage, our Talent Acquisition team will call you to discuss the role, your motivations, and your career history. We will provide feedback to all applicants either via email or telephone. The preferred candidate will be subject to background screening conducted by Tritusa or an approved third-party provider. Be part of a company where innovation meets impact. Discover more about how we deliver excellence at www.tritusa.com.au If this job isn’t quite right for you but you're exploring new opportunities, feel free to contact us for a confidential discussion.