Founded in 1997.
Rebuilt for what comes next.
COMPANY
Generations in recovery.
Medi-Chem
Founded by Graham and Mark Vinsen, Medichem pioneered safe and compliant disposal systems for medical and laboratory waste across New Zealand. The company was acquired by Transpacific Industries (ASX:TPI) in 2006, setting the foundation for Graymark’s future chemical recovery operations.
Graymark Technologies Ltd.
Founded in Auckland, November 1997, by Graham and Mark Vinsen. Originally built as the technology R&D arm for Medi-Chem and the initiatives that follow this timeline.
Kauri Gum Distillation
Developed and trialled a solvent-based distillation process to extract Kauri Gum from swamp material. Utilising butyl acetate and a Ciemme distillation unit, the trials proved technically viable and commercially pioneering in natural resin recovery.
Algae-to-SAF
Conducted early-stage research into the conversion of algae biomass into sustainable aviation fuel (SAF). While economically unviable during low fuel-price cycles, the work validated pathways now central to emerging biofuel innovation.
EcoCover
Developed an environmentally friendly ground-cover system made from recycled paper fibre and waste adhesives. Designed to reduce landfill input and improve soil moisture retention, the initiative demonstrated early circular-economy potential within construction and horticulture sectors.
Pacific Steel Ash Recovery
Designed and implemented a capture and disposal system for ash from Pacific Steel’s exhaust filtration units. The new process increased daily ash recovery from 5 tonnes to 18 tonnes, significantly reducing particulate emissions and improving Auckland’s air quality.
Fluorescent Tube Recovery
Engineered a HEPA-vacuum pulveriser to process mercury-containing fluorescent tubes. Captured mercury vapours were recovered through the precious metals industry, and recycled glass re-entered manufacturing streams. The operation evolved into Interwaste, now recycling over one million tubes annually.
Solvent Recovery
Installed and operated New Zealand’s first automated Renzmann 3000 L/h distillation system for recovering reusable solvent from print and coatings industries. Enabled closed-loop reuse of industrial solvents, reducing virgin solvent demand and waste volumes.
Hazwaste
Established as a modern hazardous waste management business, Hazwaste specialised in collection, treatment, and secure disposal of industrial chemicals. Exited to EnviroNZ (LON:CXI) in 2022 following rapid regional growth and integration success.
Graymark Technologies
Our flagship Regen was launched in-market October 2025, live and processing. The next chapter of the same work.
Leadership
Approach
Graymark funds its own R&D and delivers finished, operational systems. We identify waste streams that have recoverable value, build the machines to extract it, and deploy them into industry.
Every platform is designed for containerised deployment, multi-stream processing, and rapid iteration. A new waste stream goes from characterisation to live processing in weeks. A new site goes from assessment to deployed unit in days.
We control the full stack — chemistry, hardware, controls, deployment, operations. No subcontractors on the core process. No dependency on third-party IP.
Operations
Graymark's R&D and central processing facility operates from Nelson, at the heart of New Zealand's forestry and primary industry corridor. Deployed units are shipped to customer and project sites across the country.
The waste streams we target — timber treatment chemicals, contaminated soil, industrial solvents, process residues, metal fractions — exist at scale in every country with primary industry. The platform architecture is designed to lift and shift internationally.
PT-2/ Supply the Resource
coming soon
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