PT. Blacksteel Properties dba Blacksteel Construction is established in 2013 by Isaac Bliss Tanihaha, a graduate from UCLA in Mechanical Engineering and also the founder of Bliss Holding Group Inc. dba Bliss Construction. Blacksteel Construction's vision is to be the PREMIER CONSTRUCTION SOLUTION for Indonesian Government, private and public developers, and individual owners by offering integrated construction services from planning to designing to building. The company's mission is to enhance the construction service quality and integrity in Indonesia Archipelago. Serving and satisfying the clients is the most important goal of Blacksteel Construction.


Dr. Ir. A. Hermanto Dardak, MSc

President Commissioner

Mr. Achmad Hermanto Dardak, a graduate of Institut Teknologi Bandung (ITB), received his Master’s Degree in Civil Engineering from The University of New South Wales and obtained his PhD in Transport Economy from the same institute. Mr. Dardak served as the Chairman of the Indonesian Engineers Association (PII) for the 2015-2018 period. Previously, he was leading the Regional Infrastructure Development Agency for the 2014-2016 period. Mr. Dardak also served as Republic of Indonesia’s Deputy Minister of Public Works from 2010 until 2014. Mr . Dardak was awarded with the world's most prestigious award in the field of road construction, namely the International Road Federation (IRF) Professional of the Year.

Isaac Bliss Tanihaha, MSc

Vice President Commissioner & Managing Partner

Mr . Tanihaha is an 18-year veteran in the construction and real estate industry, both in United States of America and Indonesia. He obtained a Bachelors of Science in Mechanical Engineering from University of California at Los Angeles (UCLA) and obtained a Masters of Science in Construction Engineering Management from University of Alabama (UAB). Mr . Tanihaha has developed and managed projects in excess of US$500 million in various cities of Southern California and various provinces of Indonesia.

Isabel Tan

Commissioner & Managing Partner

Mrs. Tan is a graduate of Chapman University with a degree in Accounting. She has been a Managing Partner for PT . Blacksteel Properties since its inception in 2013. Mrs. Tan has successfully overseen over 1,000,000 M2 of commercial and residential building construction in the past 7 years.


Integrated Design

Masterplan Study and Design

Engineering (Structural, MEP) Design

Commercial Building Design

Residential Building Design

Infrastructure Construction

  Drainage / Sewer

  Cut and Fill


Building Construction



Mixed Use

Low & High Rise


Construction Financing

Turn Key Solution

Joint Venture

Build Operate Transfer (BOT)


PT. Blacksteel Construction 
27th Floor Scbd, Revenue Tower
Jl. Jend. Sudirman No.52-53
Jakarta Selatan 12190, Indonesia
☏ : +[62-21] 50383999 
Email :