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Meet the Team

Michael Lee
CPEng (NZ), Dip. Highway Engineering, CMEngNZ, IntPE(NZ), BE (Civil)
Chartered Professional Engineer - Takapuna Office

Michael has been a part of Airey Consultants Ltd for more than 20 years and manages the civil engineering team at Takapuna. Michael’s specialty is land development and he has significant expertise and experience in all aspects of subdivision development including  feasibility assessments, due diligence, consent applications, project management and contract administration. Teamwork with a wide range of associated disciplines is often required for significant projects and Michael is often called upon to assemble and co-ordinate a development team through the consent,design and construction processes. He enjoys catching the occasional snapper, hitting a golf ball and collapsing at the family bach when time allows.

Email Michael Lee
David McKenzie
CPEng, CMEngNZ, IntPE(NZ), BE (Civil, Structural)
Chartered Professional Engineer - Botany Office
David has been with Airey Consultants Ltd for 25+ years and has been working in the greater Auckland area for 30 years. He has extensive experience in structural engineering design of residential, commercial, industrial and tensioned membrane structures. He has had widespread involvement in various aspects of civil engineering, including design and supervision of residential subdivisions, roading and drainage projects. Outside of work, his wife, two children and sport dominate his free time. David is passionate about triathlon and multisport and has represented NZ in Xterra off-road triathlon. David also loves playing golf and currently plays off a 5 handicap.
James Greenwood
CPEng (NZ), CMEngNZ, IntPE(NZ), BE (Civil)
Chartered Professional Engineer - Takapuna Office

James has been working with Airey Consultants Ltd since 1996.  He has a strong background of land development and subdivisional projects, including large scale coastal developments. Skills include infrastructure design and project management.

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Mike Williams
CPEng (NZ), CMEngNZ (Civil, Structural), BE (Civil)
Chartered Professional Engineer - Botany Office

Mike has a wide experience encompassing all aspects of civil, structural and fire engineering, from residential to industrial and commercial projects, with strong capability in children's playground design and inspection.

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Royden Tsui
Associate Director
CPEng, CMEngNZ, IntPE(NZ), MEPM (Hons), BE(Civil)
Chartered Professional Engineer – Botany Office
Royden has been working with Civil Engineering Department of Airey Consultants Ltd since 2015 and has been working in the field over the past 17+ years. He completed his Master Degree (Engineering Project Management) with The University of Auckland in 2020. He has broad experience on infrastructure development and subdivisional projects in Auckland, Whanganui, Wellington, Christchurch and overseas (Hong Kong). His key skills include undertaking infrastructure design, construction supervision of civil works that include earthworks, drainage works and pavement construction; and project management. Royden loves to go swimming with his children in the weekend. He also plays table tennis with his friends, when time allows.

Email Royden Tsui

Ian Gibson
Consultant Civil Engineer / Project Manager
CPEng (NZ), CMEngNZ, IntPE(NZ), BE (Civil)
Chartered Professional Engineer - Botany Office

Ian has been with Airey Consultants Ltd since 1981, starting out working in the Pukekohe office before becoming manager of the Howick office in 1987. He has extensive experience in the structural design of residential, industrial and low rise commercial buildings. He also has extensive experience in civil engineering projects including the design and contract supervision of residential subdivisions, roading, carparks, and drainage projects. Ian is married to Karen, and has grown up children Clare, Merran and Hamish. Family activities, Coastguard and Golf and Multisport take the time outside work hours with 3 successful finishes in the Speight’s Coast to Coast some of the highlights.

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Justin Ralston 
Senior Engineer - Manager Queenstown
CPEng (NZ), CMEngNZ, BE (Civil)

Chartered Professional Engineer - Queenstown Office

Email Justin Ralston

RT 2019
Roger Twiname
Consultant Structural Engineer
CPEng (NZ), CMEngNZ (Civil, Structural), BE (Civil)
Chartered Professional Engineer - Takapuna Office

Roger has been working with Airey Consultants Ltd for more than 25 years.  He has a wide experience in structural engineering and fire engineering design in commercial, industrial and residential design projects located about the greater Auckland area and around the country.  Roger is the author and illustrator of a number of books including The New Zealand A to Z All Ages: Amazing Alphabetical Alliterations and his artworks has been on exhibition in studios around Auckland. He participates in numerous mountainbiking and multisports events. With two teenage children combined with his various talents he is a true inspiration for time management!

Email Roger Twiname


Level 8, Takapuna Towers
19 - 21 Como Street, Takapuna 
PO Box 33 103, Takapuna 0740
Phone: (09) 486 4542   
Level 1, Fountain Lane North 
Botany Town Centre
588 Chapel Road, East Tamaki 2013
PO Box 39 101, Howick, Auckland 2145
Phone: (09) 534 6523 /
(09) 238 9817
Level 2, Remarkables House
26 Hawthorne Drive (Eastern Access- Next to Ramada)
Frankton, Queenstown 9300
PO Box 2069, Wakatipu
Queenstown, 9349
Phone: (03) 442 3101