Who We Are

Westerfeld Engineering was established in 1989 by its Directors Siggi Westerfeld and Stephen O’Mahony.


Today the company has over 40 experienced engineering and technical staff, including highly skilled field and workshop tradespersons. The company also provides world class engineering design services through its close relationship with a number of engineering consultants.

Technical Director
Siggi Westerfeld

Over 35 years experience in mining/materials handling industry including construction, erection & commissioning of major bucket wheel reclaimers, stackers & crushing plants.

Commercial Director
Stephen O’Mahony , BE, CPEng

Over 30 years experience in the construction industry specialising in materials/ components supply & timber handling machines.

General Manager
Zaffer Soemya , BE, CPEng

Over 30 years experience in the construction industry.

P: 0419 304 000
Operations Manager
Stephen Chojnowski

Over 25 years experience in gearbox and drive assembly and refurbishment.

P: 0419 914 730

Why Us?

  • Over 40 experienced tradespersons, engineering and technical staff

  • World class engineering design services

  • 25 years experience in bulk materials handling and construction industry