OUR TEAM

Four directors currently form the board responsible for our Perth office enabling our clients to at all times be serviced by a Director of the company.


In addition to our Perth office RBB's Melbourne office is headed up by Peter Clack.


DirectorsMark Hampson – FAIQS, CQS, MRICS
Stephen Warne – FAIQS, CQS
Clayton Boyd – AAIQS, CQS
Sadmir Ceric – FAIQS, CQS
Peter Clack - FAIQS, CQS
Associate DirectorsPrakash Varsani – AAIQS, CQS, MRICS
Angela Vong – MAIQS, CQS
Travis O'Neill – MAIQS, CQS
Jake Sanders – MAIQS, CQS
Tina Wittber – AAIQS, CQS
Sean Brosnan – AAIQS, CQS, MRICS
Ken Chua – AAIQS, CQS

Ralph Beattie Bosworth employs 35 Quantity Surveyors and support staff in the Perth Office.

Mark Hampson

  • Director since: 2011
  • Specialises in: health, offices and fit outs, remote projects, infrastructure and engineering.
  • Recent Experience: Karratha Health Campus, Warren Health Services, Narrogin Health Services, Broome North Primary School, Broome Residential College, Cathedral Square Redevelopment State Government Fit Out for Supreme Court, SAT, DOTAG and Treasury, Cloisters Redevelopment, Perth Rectangular Stadium Redevelopment, Flying Fish Cove Wharf Extension.

Stephen Warne 

  • Director since: 2012
  • Specialises in: public and civic projects (administration, arts & justice), civil and engineering, education, health and aged care, sporting facilities, retail.
  • Recent Experience: Wembley Sports Park, Perth Arena, Western Australian Basketball Centre, Helicopter Underwater Escape Training Facility, Newman Short-Stay Accommodation, Ocean Keys Shopping Centre, South Fremantle Power Station Master Planning, Ellenbrook College.

Clayton Boyd

  • Director since: 2016
  • Specialises in: land development/urban renewal, retail, civil infrastructure & engineering, health and aged care, sporting facilities.
  • Recent Experience: Elizabeth Quay, Curtin Main Street and Public Realm, Karrinyup Shopping Centre, Western Australian Rugby, SCGH Adult Mental Health Unit, Perth City Link, East Perth Riverside.

Sadmir Ceric

  • Director since: 2016
  • Specialises in: health, remote projects including North WA, infrastructure and engineering projects, medium/high rise residential, aged care refurbishment, fit-out and heritage projects.
  • Recent Experience: Warren Health Services, Narrogin Health Services Redevelopment, Joondalup HC Peadiatrics & Renal, Pilbara Underground Power Project (PUPP), Port Kennedy Bay Public Infrastructure, Perth Airport, SJOG Day Surgery, SJOG Mt Lawley Hospital, Parliament House.

Peter Clack


  • Director since: 2017
  • Specialises in: infrastructure, rail, education, justice, tertiary, commercial sectors and expert witness.
  • Recent Experience: Yarram District Health Services, Warrnambool Library, Baranduda Sporting Pavilion, Bank Financial Services for Various Multi-Unit Developments, Bank Financial Services for Various Industrial Developments.

Prakash Varsani