A united team of engineers, architects, musicians, designers and scientists, all with one common goal: to deliver exceptional acoustic designs

Our People

Our strength in acoustic design comes from the diversity of our team members who have been drawn from engineering, architectural, musical and academic backgrounds.

Our company philosophy, technical resources and uniquely creative working environment result in an enviable level of staff retention that provides our clients with stable and committed project teams.

Our culture and infrastructure brings all of our technical staff together, allowing our combined acoustic experience of over 1,100 years to benefit our projects.


Our Work

Our projects represent our company philosophy and proud history as an innovative, creative and specialist acoustic consultancy.

Our experience, both at an international and local level, encompasses performing arts design, building acoustics, sound system design, planning & resource consents, environmental noise, industrial noise control, underwater acoustics and structural dynamics & vibration analysis. We also develop industry-leading acoustic design tools that are used globally by acoustic professionals.

Our work includes projects in Australia, New Zealand, Europe, China, Hong Kong, Malaysia, Singapore, the Middle East, the Pacific Islands, and the USA.

Our Work

Our History

Marshall Day Acoustics was co-founded in 1981 by Christopher Day and Sir Harold Marshall in Auckland, New Zealand. In 1987, Peter Fearnside became the third partner and founded Marshall Day Acoustics in Australia, whilst also developing the business significantly into the S.E Asia and China markets. Many of the technical innovations and industry-leading acoustic design tools for which Marshall Day Acoustics has become widely respected have been led by Keith Ballagh, who became a partner in 1990.

Our growth over the past 40 years now sees more than 90 professional staff employed throughout New Zealand, Australia, China, Hong Kong and France with over 20 employee shareholders invested in the company.

From our beginnings as a local consultancy, we have carefully evolved into one of the largest acoustic engineering firms worldwide, working on major projects in over 15 countries.

Sir Harold Marshall KNZM

Sir Harold Marshall is an architect, engineer and physicist who is recognised internationally for his contribution to concert hall design.  Formerly Professor of Architecture at the University of Auckland and Head of the Acoustics Research Centre, Dr Marshall has over 45 years experience in the acoustical design of auditoria and concert halls.  His work is widely cited in technical literature and his interest in these fields has been sharpened by his active involvement in musical performance both as a chorister and as a bass-baritone.

“I regard the acoustic designs of Marshall Day Acoustics to be amongst the finest and probably the most innovative in the world”

Dr Anders Gade, Associate Professor Technical University of Denmark

Careers / Job Opportunities

The people who work for Marshall Day Acoustics have come from a wide range of engineering, science, music and architectural backgrounds that brings a diversity of experience to our wide range of projects. Every two years, all our staff from all of our offices come together to connect, discuss projects, share new developments and set out the vision for the company's future. We believe this connection is unique among firms of our size and fosters the spirit of the Marshall Day Acoustics' "family". If you would like to work in a creative and nurturing environment, with excellent conditions and highly competitive salary, we would like to hear from you.

If you work at Marshall Day Acoustics, you are likely to have the following qualities:

  • Excellent academic qualifications
  • Be a self-starter & team player
  • Be passionate about life

If you are a graduate or experienced consultant and would like to work for Marshall Day Acoustics, please send us your CV with a brief note why you would like to work for us.

For career opportunities in New Zealand, email recruitment@marshallday.co.nz.
In Australia, email recruitment@marshallday.com.
In France, email bordeaux@marshallday.fr.

Quality Assurance

Marshall Day Acoustics is committed to improving our delivery of quality and to enhancing our reputation as suppliers of quality acoustical consulting services.

Our offices in Melbourne, Sydney, Perth, Adelaide, Christchurch and Hong Kong are certified in accordance with ISO 9001-2015. The certifying body is SAI Global and the certificate number is QEC 23174.

Details of our quality management system can be provided upon request.