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CALVIN TREWIN
Associate Civil Engineer 
​Contract Consultant









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​Calvin commenced his working career in 1985 doing survey and engineering work with Webb & Toll who later became Land Management Survey.   In 1990 having completed a Civil Engineering Associate Diploma he joined Shepparton Water Board as a Technical Officer in the Development Group. Several years later he moved to Fisher Stewart Pty Ltd in Shepparton.  In 1998 he joined Goulburn Valley Water as a Senior Technical Officer where he stayed for 10 years gaining valuable water industry design experience. 

In 2008 he set up Central Drafting & Technical Solutions Pty Ltd and commenced project work for Infrastructure Solutions and other clients.  ​Calvin has extensive experience in municipal and waste design projects, project management  and subdivisions - both design and supervision, sewer and water reticulation and pump station design.

His knowledge of Civil 3D and Civil Site Design software plus other associated software is exceptional.

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Qualifications/Further Training:
  • Civil Engineering (Associate Diploma)
  • Trench Shoring and Safety
  • Confined Space Entry
  • Certificate of Industrial Occupational Health and Safety (5 day course) 
  • Asbestos Awareness
  • OH&S and Contractors /Clerk Works (2 Days)
  • Certificate of Continuing Education Horizontal Directional Drilling Seminar  
  • Industry Induction Training (Red Card) 
  • CCF Basic Worksite Traffic Management 
  • Civil 3D and Civil Site Design Software 
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