Aaron brings 12 years of experience in the energy sector across various industry segments; generation, retail and distribution.
Working in project management and engineering roles has seen Aaron cover projects across many energy sources from Hydro to Solar, Wind, Thermal and Geothermal and has been involved in the full project life-cycle from pre-feasibility, resource consenting, design, and right through to construction and asset management.  Aaron has an Honors degree in Mechanical Engineering, a Diploma in Energy Management and an MBA.

RegenerateNZ Ltd. (Re-Generate) was formed in August 2017 as a specialist energy and water solutions business with commercial activities spanning; consulting, design, supply, specialist services and contracting.  The company has core operations within the hydro-generation industry but also applies specialist skills and services to general industry relating to energy and water optimisation. 


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John Erskine (CPEng) - Technical Director 

John has 12 years’ experience in the design, installation and operation of hydro generation schemes and has previously held design and project management roles on a variety of large multi-discipline engineering projects.  John has specialist skills in Pelton turbines, advanced FEA stress analysis, vibration analysis and HAZOP/FMEA facilitation as well as site management and unit commissioning.  John has extensive engineering and design management experience incorporating a strong focus on 'safety in design' and quality.  John also has expertise in the manufacturing and irrigation sectors and an Honors degree in Mechanical Engineering.

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Aaron Worner - Operations Director

Aaron Worner brings 13+ years of experience in the energy sector incorporating multiple engineering disciplines across various industry segments, such as generation, retail and distribution. Working in project management and engineering roles has seen Aaron cover projects across many energy sources including Hydro, Solar, Wind, Thermal and Geothermal. Aaron has worked across all project stages from prefeasibility, design, through to construction and asset management.

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Richard Weaver - Commercial Director

Richard Weaver has 22 years of experience across a range of business development, technical, commercial and senior management roles.  Having predominantly worked in the Water industry, Richard has been exposed to a range of industries and engineering environments including; Power, Mining, Oil & Gas, Municipal and Pharmaceuticals. Richard also has in depth experience across a wide range of contracting models including; Design, Design & Build, DBO (Design, Build & Operate) and BOOT (Build, Own, Operate, Transfer).

Key Staff



Aaron Chinnery-Brown - Sen Mechanical Engineer

Aaron has an Honours degree in Mechanical Engineering and brings a range of experience as an independent contractor in the civil construction and commercial diving sectors.  Aaron has extensive experience in condition assessments of a range of turbine types (Kaplan, Francis & Pelton) as well as experience with design, manufacture and testing a range of lifting equipment including lifting beams and draft tube platforms.  Aaron also has had involvement in a range of water treatment systems with specific expertise in water filtration.

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Alastair Rose  - Senior Mechanical Engineer

Alastair has broad mechanical and hydro engineering design skills having been involved in design, installation and testing of Propeller (Kaplan) and Francis turbines. This includes new installations and various refurbishments including the 28 MW Mangahao Francis plant upgrade. Alastair also has had involvement in a number of valves including a 30 MW relief valve and large diameter butterfly and ball valves.  Alastair also has extensive site commissioning and testing experience to go with his Honors degree in Mechanical Engineering.

Quinton Rowson - Senior Mechanical Engineer

Quinton has more than 19 years experience in engineering over a range of industries including Power Generation (Hydro, Wind, Gas turbine, Staem turbine, geothermal), Oil & Gas, Petrochemical, Aerospace, Automotive, engine development and rail.  He has worked on most equipment that can be found in these industries such as pumps, compressors, penstock, runners, and pressure vessels.  Quinton is a specialist for Fitness for Service assessments (FFS), fracture mechanics, creep/fatigue, stress analysis, FEA, CFD and vibration analysis.  While working in a wide range of industries he has also been incorporated into all stages of work including feasibility, business case development, concept, preliminary and detailed design, manufacture, construction, installation, commissioning, handover, asset management, inspection, repair and derating.


Cameron Kay - Senior Mechanical Engineer

Cameron has a strong background in irrigation and water handling system design, project execution and commissioning.  He has delivered in key roles in agricultural, horticultural and municipal water schemes including five years on one of NZ’s largest pressure pipeline projects. Cameron is passionate about detailed planning for safety, quality and efficiency, and has proven highly capable in achieving great outcomes with multi-focussed teams across a range of disciplines.


James Maunder - Senior Mechanical Engineer

James has 10 years experience predominantly as a Mechanical Engineer in the Hydro-Generation Industry.  In that time James has worked for a hydro-power design consultancy, a hydro generation asset owner and a mechanical contracting firm specialising in hydro-power refurbishment work.  James’ multi-disciplinary knowledge and hands-on approach to problem solving is highly valued.  James has specific expertise in the design of Pelton turbines, hydraulic transients analysis, speed governors, and efficiency testing of water turbines by the thermodynamic method. 


Craig Hill - Senior Mechanical Engineer

Craig has worked as a Mechanical Design Engineer for over 10 years throughout NZ and Australia, modernising manufacturing plants in Heavy Industry, Food & MFCG's, Wood and Automation.  His experience ranges from machinery design, automation & robotics, engineering analysis and failure analysis.  Craig's experience offering end to end solutions from concept design through to commissioning offers a practical approach taking into account best practice engineering design and commercial considerations. 

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Lee Cameron - Senior Mechanical Engineer

Lee brings over 20 years’ experience having worked in the aerospace, marine and manufacturing engineering sectors where he was involved with the design, testing and manufacture of various electromechanical and hydromechanical systems.  Experienced in SolidWorks, Inventor and OnShape CAD packages and has an interest in hydraulic fluid power systems which have strongly featured in his career to date.  He has worked in a Technical Sales Support role liaising directly with the customer/end user and whose responsibilities included the response to commercial tenders and the generation of technical proposals.  Lee is a strong communicator and is experienced in Factory Acceptance Testing together with on-site activities including system installation and commissioning.

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Dean Caseley - Mechanical Fitter/Technician

Dean has over 35 years’ experience with a trade background as a Fitter and Turner and specialist skillsets in heavy manufacturing engineering.  Dean has extensive experience in heavy machining being entrusted as the principle machinist for many years at one of NZ’s largest machine shops.  Dean is especially skilled in operating and programming a range of large boring and turning equipment. Dean is also extremely well versed in inspection and measurement skillsets with many years’ experience operating CMM’s. 

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Ramon Palmer - Mechanical Engineer/Fitter

Ramon has a background as a fitter and machinist in the heavy manufacturing engineering industry. His vast experience using CNC machining centres is valuable for design review and assessment of manufacturability. Ramon has extensive on-site experience in refurbishment and installation of various hydro power sites across Australasia and utilises this experience when undertaking turbine condition assessments. Ramon has a diploma in mechanical engineering and is also experienced in the use of the Re-Generate 3D Scanning, Positive Material Identification and Laser Tracker tools.

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Clint Gray - Mechanical Engineer

Clint has worked as a mechanical design engineer for over 15 years in New Zealand. He is a very capable machine designer with significant experience in the heavy transport, side loader crane, and forestry industries. He has extensive experience in ground up product design, validation including complex FEA problems, and the execution of the manufacturing of the final product.

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Joseph Jury - Mechanical Engineer

Joseph has worked for Re-Generate as a design engineer for close to three years and has experience working in the hydraulic and energy generation sectors, having worked previously in the forestry industry as a design engineer.  


Mark Stoffels - Mechanical Engineer

Mark has a PhD in Mechanical Engineering with a focus on computational materials science. He brings a strong research background and a versatile engineering skill-set. Mark is flexible in approaching complex problems and has a passion for delivering high quality, practical solutions to clients.


Dominic Stulen - Mechanical Engineer

Dominic has an honours degree in Mechanical Engineering from the University of Canterbury and is new to the Hydro-Generation industry. His experience includes Motorsport Engineering, SolidWorks and a range of 3D printing from plastics to metals.  Dominic has a practical background and a passion for innovative, efficient designs.


Nick Johnson - Mechanical Engineer

Nick has recently completed a Master of Engineering in Management, adding in-depth understanding of business operations to his technical engineering skills. Nick helps with the identification and implementation of improved information systems to increase company efficiency wherever possible, including the monitoring of company procedures and processes to maintain high levels of health and safety, quality, and environmental management.


Yelena Pogrebinskaya - Senior Electrical Engineer

Yelena brings over 38 years of experience across a range of technical electrical engineering and automation experience in the hydro, electrical distribution and manufacturing industries. Yelena has covered and is technically proficient in all aspects of control and automation design and programming and has a high degree of competency with most readily used OEM proprietary software programming packages. 


Sean Grayston - Project & Financial Coordinator

Sean has sixteen years of experience across a number of business development and project management roles.  His most recent experiences are based in project management of design, manufacture and installation of road signage for the civil industry and commercial graphics/signage for a variety of industries across New Zealand.  His education in finance and econometrics focused on business, developmental and public economics.  His practical experience includes project management, business case development, procurement (domestic/international), risk/sensitivity analysis and HSEQ system implementation project planning.  Sean manages the implementation and monitoring of internal systems and procedures including industry best practice HSEQ considerations and compliance with Re-Generate's ISO 9001 & 45001 certification and IMPAC Category 3 Prequalification.