OUR TEAM

Six 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.


DirectorsKevin Daniels – FAIQS
Mark Hampson – FAIQS, MRICS, CQS
Stephen Warne – FAIQS, MRICS
Matthew Buss – FAIQS, MRICS
Clayton Boyd – AAIQS
Sadmir Ceric – AAIQS
Peter Clack - FAIQS, CQS
Associate DirectorsGraeme Zorn – AAIQS, NZCQS
Nick Emmanuel – FAIQS
Prakash Varsani – AAIQS, MRICS
Daniel Tang – AAIQS
Giuseppe Costanzo – AAIQS

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

Kevin Daniels

  • Director since: 2000
  • Specialises in: education, recreation, residential & retirement housing, commercial & refurbishment including heritage.
  • Recent Experience: UWA Ezone Building, Curtin Medical School, WA Schools PPP Programme, Yanchep High School, Koh-I-Noor Aged Care Home, Perth College Learning Centre, Fremantle College, Curtin Main Street, Wesley College Science Centre, All-Saints Middle School, Guildford Grammer Early Learning Centre.

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.

Matthew Buss

  • Director since: 2014
  • Specialises in: office developments and fitouts, state government civic and judicial projects, infrastructure and resources projects.
  • Recent Experience: Woodside Office Fitout, Perth Rectangular Stadium – Redevelopment Stage 1, WA Police CBD Accomodation Consolidation, Hale House – Cabinet Offices, Various Regional WA Police & Justice Complex, AMC – Technology Precinct Development Stage 2.

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.

Graeme Zorn

  • Director since: 1986
  • Specialists in: offices, commercial, health, hospitality & retail.
  • Recent Experience: Fiona Stanley Hospital, QEII Hospital – Central Plant, Burswood Entertainment Complex, RAC Office Headquarters.

Nick Emmanuel

  • Director since: 1986
  • Specialists in: offices, commercial, health, hospitality & retail.
  • Recent Experience: Fiona Stanley Hospital, QEII Hospital – Central Plant, Burswood Entertainment Complex, RAC Office Headquarters.

Prakash Varsani