Our Team

A team of trained Cedar maintenance specialists committed to enhancing
the value and appearance of your Cedar property

Dave Openshaw – Owner
027 336 8351

As the new owner of Cedar Doctor Dave is keen to grow the Cedar Doctor brand by ensuring that customers continue to receive top quality service.  Although originally from a marketing background Dave has good practical skills and is used to being on the tools with the team

“The philosophy at CDR is to bring to their customers a quality refurbishing service that delivers a 100% satisfaction rate”


Hans Slierendrecht – Operations Manager and Senior Technician

022 1577 330


Hans is our operations manager.  After contracting to CDR in Northland for 4 years he joined the Cedar Doctor head office team in 2014.  Next to John, he is our most experienced Cedar maintenance technician.  He combines his varied work skills with a careful and considerate approach that brings favourable results for Cedar Doctor clients who frequently comment on his pleasant manner and outstanding work ethic.


“We do our work in a professional manner so that we leave our clients happy”

Martin Rattray – Business Manager
021 577 312

Martin, our business manager, is responsible for our office and business management.  Although he comes from an administration management background he is not afraid of getting his hands dirty and can at times be found working with the team on site.  He is strongly focussed toward ensuring attention to detail, high-quality work, and that customer satisfaction is achieved.

“The job is not finished until it has been done right”


John Skellon – Consultant

John, a co-founder of Cedar Doctor, is now a consultant to Cedar  Doctor and is keen to pass on his sound technical knowledge and years of practical hands-on experience to the Cedar Doctor maintenance business. 


“Adding longevity, beauty and value to our client’s timber structures is the foundation of CDR”