SRE III @ Tower Research Capital | Infrastructure & Reliability Engineering | Automation | Linux Systems. Driven, results-oriented Senior Site Reliability Engineer with a strong background in Linux system administration, automation, and Big Data technologies. Proven expertise in maintaining highly available and resilient infrastructure, with a commitment to continuous improvement and automation. Adept at collaborating with cross-functional teams to ensure the reliability and performance of mission-critical systems. Currently enhancing the infrastructure of Visa as a Senior System Engineer, and previously contributed significantly to the Defense Science and Technology Agency (DSTA) in Singapore. I specialize in automation using Python, Ambari, JavaScript, Shell Script, and Ansible, leading projects that save over 1000 hours annually. Previously at DSTA (Defense Science and Technology Agency), served as a Senior Engineer in Cyber Security for 7 years. Led the implementation of Cloudera Hadoop and Elastic Stack in a RedHat Enterprise Linux environment. Utilized various Big Data technologies such as Hadoop (HDFS) and ETL solutions (Kafka/Nifi) for data engineering and analytics. Acted as a Subject Matter Expert for security and threat assessments of Cloudera and Elasticsearch. Managed vulnerability scanning and remediation of endpoints, including application servers. Designed and implemented external data platform solutions to align with internal network architecture. Ensured the cyber security posture of big data servers. Proficient in Linux/RHEL implementation, system administration, and maintenance. Successfully managed end-to-end Cyber Security projects, overseeing scope, budget, and timeline. 7 years of experience in Project Management More than 5 years of experience in Big Data and Data Engineering and 2 years in Cyber Security Contact me at jonathanlzk@gmail.com