Wellington Team

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David McMahon 


Telephone: 04 903 5344
Mobile: 027 233 1917

As a founding Director of RMG and after working in the Christchurch Office for a decade, David moved to Wellington in 2011 and established the practice in the coolest ‘Little Capital’.  Initially operating as a two-person consultancy, the practice now supports a total of five consultants working predominantly in the upper South Island and lower North Island.

Although heavily involved as an independent RMA Commissioner engaged by local authorities to make delegated decisions on resource consents, designations and district and regional plans, David’s passion still rests in assisting clients in both the private and public sector to successfully navigate the resource consent process.  Early engagement in projects is the key to benefiting from David’s extensive RMA knowledge.    

As a passionate wine and food enthusiast, David continues to embrace the Wellington lifestyle, though he remains an ardent Canterbury Rugby supporter.

Jason Jones 

Consultant Planner

Telephone: 04 903 5344
Mobile: 021 079 8357

Jason joined RMG in 2008, following three years in local government planning.

Jason’s project management skills, work ethic and open-minded approach make him a valuable addition to RMG. His wide-ranging experience includes land development projects, planning policy development, mediation and expert witness attendances, major infrastructure projects and strategic consultation. Jason has practical experience with dozens of RMA Regional and District plans and strategic policy documents across New Zealand. 

He is a passionate supporter of Football Club Barcelona, a decorated home brewer and a curator of useless knowledge.

Jacqui Manning

Consultant Planner

Telephone: 04 903 5344
Mobile: 027 241 3968

Having taken a break from planning to pursue a teaching career, Jacqui has returned to the planning fold, bringing with her over 20 years of environmental planning experience.

Jacqui has previously worked for local authorities across both the North and South Islands, and most recently at New Plymouth District Council.  She has also worked as a consultant in both Christchurch and Taranaki.

She brings with her a superb knowledge of the Oil and Gas industry, as well as extensive experience in consenting, district plan interpretation, designations, environmental impact assessments and consultation.

Outside of work and between travel, Jacqui is fully occupied as ‘mum’s taxi service’ in addition to being coach, manager, scorer and main supporter to three wildly sporty children. She has also spent time residing in the Middle East and has a real passion for visiting new places.

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Mark Leggett

Consultant Planner

Telephone: 04 903 5344
Mobile: 022 601 3461

Mark joined RMG in early 2019. He brings with him over 25 years of experience in resource management in New Zealand and England. His previous experience in consultancy, local and central government traverses legislative development, regional and district consenting, plan preparation and review, practice improvement, professional training, dispute resolution and team and project management.

Immediately before joining RMG, Mark led the development of a second-generation unitary plan for Nelson City Council. Mark is able to turn his mind to new projects and fields of work with ease and make a valuable contribution from day one.

As a keen cycle tourer, sea kayaker and lover of the arts, Mark is ideally suited to life in Nelson. In recent years he has added woodworking to his skill set. Having proved himself capable of making crude outdoor furniture, he has now been allowed inside, to make crude indoor furniture.