Margetic and Sitzler Consolidated Holdings owns a number of businesses in Northern Australia including its construction arm Sitzler. Sitzler Pty Ltd is a major award-winning construction company in its 47th year of operation. It has been involved in the delivery of the majority of major infrastructure projects delivered in Northern Australia under PPP’s with the NTG and Federal Govt over the past two decades and maintains a substantial defence and public infrastructure pipeline of work.  

Sitzler was recently ranked 23 in the top 40 list of national and international defence contractors in a 2022 industry survey with projects spread across the country.  Among its North Australian projects are the Darwin Convention and Exhibition Centre, AIR 7000 P8 Hanger Facilities and Pavements, Space Surveillance Telescope and associated infrastructure, Ayers Rock Resort, RDH Cyclotron, PET and CT Scanners, and the Darwin Waterfront Wave Pool.