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Kirwin Hamman - Managing Director
Kirwin brings over 30 years of expertise in the food safety industry, with a proven track record of helping clients worldwide enhance their food safety standards. His career began as a government food inspector in both Australia and the UK, before he transitioned into private consultancy, offering his services across Europe. Throughout his career, Kirwin has collaborated with a diverse range of sectors, including hotels, food manufacturers, cruise liners, retail, restaurants, aged care facilities, hospitals and warehouses, helping them elevate their food safety practices. As an internationally registered lead food safety auditor with Exemplar Global, Kirwin certifies food businesses globally. He is also registered auditor for third-party government regulatory audits across various food sectors within Australia. In addition, Kirwin is a qualified trainer with the Chartered Institute of Environmental Health (CIEH), certified to deliver a wide range of accredited food safety training courses. Kirwin is renowned for his expertise in developing and implementing comprehensive food safety programs. His work is highly regarded internationally, particularly for his commitment to driving continuous improvement and maintaining world-class food safety standards for EHC clients. In 1996, Kirwin founded EHC, and over the past two decades has grown it into a leading global provider of food safety audits and training services. Through his leadership, EHC has become a trusted partner of food businesses seeking to uphold the highest safety standards.
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Hayley Thomas - General Manager, Operations |
Yolanda Daewoud - Office Manager
With over 25 years of experience in executive administration, Yolanda has excelled in Executive and Personal Assistant roles across a range of industries, including hotels, architecture, and wine. Her diverse background brings a wealth of knowledge and expertise to our team, making her a valuable asset in supporting our operations. Yolanda assists with scheduling Food Safety Audits and Food Safety Training and manages confirmations, contracts, and the coordination of auditor travel logistics.
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Catherine de Castro - Training Co-ordinator
Catherine de Castro has worked for The Environmental Health Consultancy for over 7 years as Training Coordinator. Catherine's main responsibilities include the development of all HACCP certificates, development of clients' dashboards in relation to food safety audit results, together with all training certificates from courses that are facilitated by EHC staff. Catherine speaks fluent Tagalog and English and is a valuable member of the EHC team who thrives off her enthusiasm.
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Shannon Hewett - EHCO App Co-ordinator
Over 20 years experience in providing administration support in the Health and travel Sectors. Shannon assists with the onboarding of clients for the EHC food safety app EHCO and provides travel support for our auditors. Shannon prides herself on developing and maintaining strong positive, and productive working relationships with both staff and clients.
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Adelene Aw - EHCO Data Administration & Support
With over 20 years of experience in IT business analysis and digital solution delivery at a major financial institution, Adelene brings a wealth of experience in understanding complex business needs and translating them into effective digital experiences. Adelene assists with the onboarding of clients for the EHC food safety app EHCO, ensuring seamless setup and implementation, supporting a smooth start and long-term operation success.
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Julian Hamman - Media Coordinator![]()
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Alice Hamman - Administration Support |
Nuanprang Simma (Yokee) - Food Safety Auditor |
Yisa Tong - Food Safety Auditor
Based in Guangzhou, China, Yisa brings over 10 years of expertise in food safety. With more than 4 years at EHC, Yisa has successfully conducted over 100 audits, ensuring the highest standards of compliance and quality. Prior to joining EHC, Yisa served as a Food Safety Manager and Quality Control Manager, where she honed in her skills in managing complex food safety operations and implementing rigorous quality assurance protocols |
Jumil De La Torre - Food Safety Auditor |
Ewald Jeske - Food Safety Auditor |
Juliet Kauter - Food Safety Auditor
Juliet, our Australian auditor has worked for EHC for almost twenty years on a part-time capacity. Juliet travels frequently to Asia, the Pacific region, Europe, America and locally in Australia to undertake food safety audits and provide food safety training to a variety of hotel groups, food manufacturers and aged care facilities. Juliet enjoys working with our clients to assist and guide them to improve their food safety standards. Juliet began her career in a government food safety auditing role close to thirty years ago after completing her university degree. |
Christina von Gemmingen - Food Safety Auditor |
Rissa Affiyanti - Food Safety Auditor |
Ipek Ekini - Food Safety Auditor |


















