BlueHalo™ is a technology suite designed to simply offer integrated carbon offsetting solutions for people and products on the move. BlueHalo™ is a product by TEM - Australia's largest and most experienced carbon offset provider.

For many organisations, the calculation of carbon emissions for flights, hotels, cruises and other activities is challenging. BlueHalo™ makes it quick, simple and real - allowing businesses to connect environmentally-conscious customers with high-impact carbon offset projects.

Established in 2014, TEM is a specialist in global compliance and voluntary carbon markets, helping businesses navigate carbon risk management, offset purchases and integration of sophisticated technology solutions like BlueHalo™. Our people, systems and processes deliver rigorous due diligence that ensure the integrity of every single offset we transact.

Our team, your team

Peter Castellas

TEM is led by Peter who brings 30 years experience working at the leading edge of the sustainable development agenda. As the former CEO of the Carbon Market Institute (CMI), Peter grew the association to become Australia’s peak industry body.

Andrew Grant
Executive Chairman

TEM’s co-founder is Andrew Grant who has pioneered all aspects of carbon markets in Australia. Andrew has a rich and varied career holding leadership roles in major corporates, advisory firms and listed companies.

James Moulder
Executive Director

With over 15 years experience in the development of carbon trading in both New Zealand and Australia, James is co-Founder of TEM and has held senior executive positions during his career as a trader and risk manager.

Gemma Bundy
Executive Assistant

Gemma manages our administration and information flow, ensuring the smooth and efficient running of our processes. Studying towards her BA in sustainable development, Gemma has a keen passion for the environment.

Elise Margaritis
Creative Director

Elise is our creative lead with over 11 years working in the carbon industry. She specialises in bringing carbon offsetting to life through branding, experiences, campaigns, social media and stakeholder engagement.

Guy Ballard
Chief Technology Officer

During a career spanning nearly 3 decades with qualifications in several facets of information technology, Guy has traversed the spectrum of IT roles from software development to executive leadership.

Adrian Enright
Partnerships Director

Adrian leads the TEM sales strategy based out of Sydney. His role includes the identification of sales prospects, sales propositions, commercial negotiations, client engagement and service delivery.

Alexander Lewis
Commercial Manager

Alexander has been directly involved in designing and administering market related systems and processes associated with the implementation of Australia’s climate change policy suite over the last six years.

Stuart Macleod
Carbon Projects Development Manager

With over 14 years experience working in carbon project management and land system studies, Stuart draws upon a rich skillset including landholder relations, Indigenous engagement, and project implementation.


Hinatea Osmany
Relationship Manager

With refined client management skills, Hinatea brings her passion for sustainability strategy to the expansion of our BlueHalo climate technology into the travel sector. Hinatea’s experience in tourism, conferences and events gives her unique insight into the industry’s workings.