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Danang Ario currently holds multiple roles at PT Len Railway Systems since May 2017, including Sales Engineer and Signalling Scheme & Circuit Designer, where responsibilities encompass designing various interlocking racks for railway systems. Prior experience includes serving as Technical Design Management at PT KCIC from February 2019 to December 2021, and a short tenure as Junior Instrument Engineer at PT. Dwitunggal Jaya Agung in mid-2016. Danang's early career involved research on safety integrity levels in ammonia refrigeration compressors during a final research project at PT Petrokimia Gresik in 2015 and an internship focusing on thermal comfort and HVAC systems at Pertamina TBBM Rewulu in 2013. Danang Ario earned a Profesi Insinyur degree and a Bachelor of Engineering in Engineering Physics from Universitas Gadjah Mada, completing the latter in 2016.