Global project development and credit sourcing

Generating and purchasing high quality international carbon credits


GreenCollar’s global operation is headquartered out of Washington DC and Australia and supported by a team of recognised international experts that oversee a large and diverse network of projects and carbon credit suppliers across the globe.

Sigma Global merged with GreenCollar in 2021. This merger together with the addition of key new staff members expands GreenCollar’s capabilities. GreenCollar now offers a complete service for the design, preparation and registration of projects and ongoing support for registered projects, as well as the procurement of international carbon offsets. Meet our team.

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For more information on how to reach your energy and sustainability goals with international carbon credits, please contact us today.