PT Sumberdaya Dian Mandiri was established on August 3, 1999, as a subsidiary of PT Tunaskarya Indoswasta. In its development, PT Sumberdaya Dian Mandiri provides Manpower Management services for various types of business industries, including Sourcing, Recruitment and Selection, Personnel Administration, Payroll and Benefits, and Training Handling Industrial Relations.

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As a provider of Human Resources services and management, PT Sumberdaya Dian Mandiri is committed to providing quality services to service users, which is proven by obtaining the ISO 9001 : 2008 Certification award. It has been upgraded to the ISO 9001 : 2015 version related to the quality management system in June 2018.

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We are supported by professional staff with different backgrounds. And we are ready to assist our clients in private companies and government institutions. With more than 24 years of experience, we have more than 8000 outsourced workers placed in various companies and supported by 20 Representative Offices located in Medan, Padang, Palembang, Pekanbaru, Jambi, Bengkulu, Lampung, Batam, Bandung, Semarang, Yogyakarta, Surabaya, Malang, Balikpapan, Makassar, Jayapura, Banjarmasin, Carbon, Taliabu and Tangerang.​