Regen unit deployed on a customer site

Graymark recovers what industry buries.

New Zealand’s industrial waste holds recoverable fuels, chemicals and feedstocks. We bury it, burn it or ship it offshore. Graymark builds the modular systems that recover it here.

New Zealand’s industrial waste holds recoverable fuels, chemicals and feedstocks. We bury it, burn it or ship it offshore. Graymark builds the modular systems that recover it here.

New Zealand can keep exporting its waste problem, or build the systems to recover it here. We choose to build.

Modular capital first.

Containerised systems sized to the stream. Deployable in days, relocatable if the economics shift, repeatable as demand grows.

Deploy at the point of generation.

Trucking hazardous waste is expensive, carbon intensive and fragile. Our systems go to the waste, not the other way around.

Commercially viable without subsidy.

If a recovery system only works with grants and credits, it does not work. Levies and credits are tailwinds, not foundations.

Product company. Not a services company.

We build finished systems

Regen is designed, built and run by us. No subcontractors on the core process.

Every job improves the next

Operating data from each deployment goes back into Regen.

Verified or not finished

Every job ends with an independent laboratory report.

New Zealand first

Built in Nelson, deployed anywhere in the country. Export follows.

1997

Founded in Auckland

As the research arm of Medi-Chem.

3

Generations in hazardous waste

The family business, still.

2

Businesses built and sold

Both to listed operators.

2025

Regen commercial

Live in Nelson since October.

Two businesses built and sold. A third built to last.

Graymark is a family company. We have built two hazardous waste businesses and sold both to listed operators. We know what gets buried, where, and what it costs to dig it back up. Regen exists because the infrastructure didn’t.

  1. 1995

    Medi-Chem

    Founded by Graham and Mark Vinsen. Medi-Chem built safe, compliant disposal systems for medical and laboratory waste across New Zealand. Acquired by Transpacific Industries (ASX:TPI) in 2006.

  2. 1997

    Graymark Technologies

    Founded in Auckland in November 1997 by Graham and Mark Vinsen as the technology R&D arm for Medi-Chem and the work that follows on this timeline.

  3. Kauri gum distillation

    A solvent-based distillation process to extract kauri gum from swamp material. The work proved technically viable and commercially pioneering in natural resin recovery.

  4. Algae to SAF

    Early research into converting algae biomass into sustainable aviation fuel. Uneconomic in a low fuel-price cycle, the work validated pathways now central to biofuel development.

  5. EcoCover

    A ground-cover system made from recycled paper fibre and waste adhesives, built to cut landfill input and hold soil moisture in construction and horticulture.

  6. Pacific Steel ash recovery

    A capture and disposal system for ash from Pacific Steel’s exhaust filtration units, cutting particulate emissions and improving Auckland’s air quality.

  7. Fluorescent tube recovery

    A HEPA-vacuum pulveriser for mercury-bearing fluorescent tubes. Mercury vapour went to the precious metals industry and the glass back into manufacturing. The operation became Interwaste.

  8. Solvent recovery

    An automated distillation system recovering reusable solvent for the print and coatings industries. Closed-loop reuse, less virgin solvent, less waste.

  9. 2018

    Hazwaste

    A modern hazardous waste management business: collection, treatment and secure disposal of industrial chemicals. Exited to EnviroNZ (LON:CXI) in 2022.

  10. 2025

    Regen 001

    Commercial since October 2025. Live and processing in Nelson. The next chapter of the same work.

  1. 1995

    Medi-Chem

    Founded by Graham and Mark Vinsen. Medi-Chem built safe, compliant disposal systems for medical and laboratory waste across New Zealand. Acquired by Transpacific Industries (ASX:TPI) in 2006.

  2. 1997

    Graymark Technologies

    Founded in Auckland in November 1997 by Graham and Mark Vinsen as the technology R&D arm for Medi-Chem and the work that follows on this timeline.

  3. Kauri gum distillation

    A solvent-based distillation process to extract kauri gum from swamp material. The work proved technically viable and commercially pioneering in natural resin recovery.

  4. Algae to SAF

    Early research into converting algae biomass into sustainable aviation fuel. Uneconomic in a low fuel-price cycle, the work validated pathways now central to biofuel development.

  5. EcoCover

    A ground-cover system made from recycled paper fibre and waste adhesives, built to cut landfill input and hold soil moisture in construction and horticulture.

  6. Pacific Steel ash recovery

    A capture and disposal system for ash from Pacific Steel’s exhaust filtration units, cutting particulate emissions and improving Auckland’s air quality.

  7. Fluorescent tube recovery

    A HEPA-vacuum pulveriser for mercury-bearing fluorescent tubes. Mercury vapour went to the precious metals industry and the glass back into manufacturing. The operation became Interwaste.

  8. Solvent recovery

    An automated distillation system recovering reusable solvent for the print and coatings industries. Closed-loop reuse, less virgin solvent, less waste.

  9. 2018

    Hazwaste

    A modern hazardous waste management business: collection, treatment and secure disposal of industrial chemicals. Exited to EnviroNZ (LON:CXI) in 2022.

  10. 2025

    Regen 001

    Commercial since October 2025. Live and processing in Nelson. The next chapter of the same work.

  1. 1995

    Medi-Chem

    Founded by Graham and Mark Vinsen. Medi-Chem built safe, compliant disposal systems for medical and laboratory waste across New Zealand. Acquired by Transpacific Industries (ASX:TPI) in 2006.

  2. 1997

    Graymark Technologies

    Founded in Auckland in November 1997 by Graham and Mark Vinsen as the technology R&D arm for Medi-Chem and the work that follows on this timeline.

  3. Kauri gum distillation

    A solvent-based distillation process to extract kauri gum from swamp material. The work proved technically viable and commercially pioneering in natural resin recovery.

  4. Algae to SAF

    Early research into converting algae biomass into sustainable aviation fuel. Uneconomic in a low fuel-price cycle, the work validated pathways now central to biofuel development.

  5. EcoCover

    A ground-cover system made from recycled paper fibre and waste adhesives, built to cut landfill input and hold soil moisture in construction and horticulture.

  6. Pacific Steel ash recovery

    A capture and disposal system for ash from Pacific Steel’s exhaust filtration units, cutting particulate emissions and improving Auckland’s air quality.

  7. Fluorescent tube recovery

    A HEPA-vacuum pulveriser for mercury-bearing fluorescent tubes. Mercury vapour went to the precious metals industry and the glass back into manufacturing. The operation became Interwaste.

  8. Solvent recovery

    An automated distillation system recovering reusable solvent for the print and coatings industries. Closed-loop reuse, less virgin solvent, less waste.

  9. 2018

    Hazwaste

    A modern hazardous waste management business: collection, treatment and secure disposal of industrial chemicals. Exited to EnviroNZ (LON:CXI) in 2022.

  10. 2025

    Regen 001

    Commercial since October 2025. Live and processing in Nelson. The next chapter of the same work.

Engineering the next generation of hazardous waste management.

Engineering the next generation of hazardous waste management.

Engineering the next generation of hazardous waste management.

Contact

Nelson, New Zealand

© 1997–2026 Graymark Technologies Ltd