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About us

Advancing & Innovating SPF Technology

At Solar-D Derma-Tech, innovation is at the heart of everything we do.

From our ground-breaking Vitamin D SPF Technology, to our modern and adaptive partnership models, through to our cutting-edge and progressive product development, we are revolutionising SPF skincare through leading innovation.

At Solar D, we wanted to change the SPF landscape and help people improve their lives with new technologies, whilst still protecting them with old ones. As over 1 billion people world-wide are considered vitamin D deficient and traditional broad-spectrum SPF was designed to screen out up to 99% of the UV light from the sun, including the UVB light we use to make vitamin D, we wanted to change the status quo.

Solar D’s Vitamin D SPF Technology was specifically designed and formulated to allow our bodies to naturally produce vitamin D without sacrificing the sun protection factor (SPF). Our mission is to offer all skincare with an SPF the chance to use our ground-breaking technology through private label and licencing opportunities.

Located in Sydney, Australia, Solar-D Derma-Tech has manufacturing capabilities in Australia and the US with distribution partners across the globe including leading Pharmaceuticals and well known cosmetic brands. See our Partners Page for more detail

Our Team

Kristina Arnott

Non-Executive Director (Chairperson)

Kristina is a practising lawyer with over 20 years’ experience. She has advised fast moving consumer goods (FMCG) companies and their Boards on a broad range of issues including litigation, regulation, governance, corporate law and contracts across multiple jurisdictions.
She has extensive senior management and commercial business experience and advises businesses on commercial, legal and governance issues.
Prior to joining the Board her most recent role was as Area General Counsel for British American Tobacco. In this role, she had responsibility for all legal, security and illicit trade issues in Australia, New Zealand and the South Pacific.
Kristina possesses good commercial business acumen with an overlay of strong governance principles to support the execution of the Company’s strategy to deliver long-term growth and sustainable value creation for shareholders.

Mathew Collett

Director, Co-founder & CEO

Mathew has over 30 years’ experience across Business Management, Banking, Corporate Advisory, FMCG and Marketing. Mathew spent over 20 years in corporate banking and financial markets where he developed a key understanding of financial instruments, business management and client relationships. Mathew was a former Director at JBWere (now Goldman Sachs Australia) and Managing Director of ICAP Australia.
In 2006 he started and managed Presidium Capital, a corporate advisory firm specializing in private equity and venture capital investments and corporate advisory for early stage business across multiple sectors. He was also part owner and managed a manufacturing & distribution FMCG company, Lime Grove. Lime Grove was the oldest and largest lime (fruit) provider in Australia which sold over 75% of Lime Grove produce to Woolworth’s.
Prior to Solar D, he helped fund, build and commercialize Cocoon Data (now Covata), a data security company now listed on the ASX (CVT). Mathew is no longer a shareholder, director, employee or advisor to Covata

Courtney Hard

Non-Executive Director

Courtney is an experienced Creative Executive who has worked in the marketing and entertainment industry for over 20 years with a focus on business development, strategy, creative direction, digital marketing and promotion. Courtney has also vast experience as an executive producer for TV, live events and recordings.

 Courtney also has strong ties and relationships across media and public relations companies across Australia and the US and has a strong track record of media relations.

  • Courtney is also Director of Media Talent Management, a leading talent management business. Her roles including staffing, and strategy planning for various projects and clients
  • Client management – celebrity and sports talent – Interface A-list talent on career direction and negotiate ambassador, endorsement, content creator, and social media deals
  • Negotiating brand partnerships and sponsorships – Coca Cola, Cadbury, Mco Beauty, Toyota, Canon, Boses, Virgin, Myer, Accor, Air Asia, H2Coco

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John Carey

Head of Sales and Distribution

With over 40 years’ experience, John began his career at Colgate Palmolive where he led the launch of products including the first Colgate ‘Plastic Tubes’ to replace the original aluminium tubes, Colgate Fluorigard Gel Toothpaste and Colgate Dental Cream Pump Pack Dispensers, all of which were highly successful additions to the company’s range.
After a 14-year career with Colgate Palmolive, John joined Scott Marketing Group as GM, COO and later CEO of the company’s national structure, Strikeforce Australia Pty Ltd.
John spent 24 years with Strikeforce and later Strikeforce Alliance, a merger between Strikeforce and a major competitor. During this time, he was involved in highly successful launches of Hudson’s Biscuits, Pringles Potato Chips, Cottons Tampons and Pads, St Dalfour Spreads and Baxters Soups and Condiments. In addition, John has managed a number of sun and skincare lines for various clients, including Le Tan, Solar Block, Rosken, Biore and Sunzapper.

Ernest Armstrong


Mr. Ernest Armstrong’s background is in global pharmaceutical development and global business development.

He is the inventor of the award-wining Solar D Sunscreen and Solar D Brightening technology and has worked in the fields of vitamin D and cosmetics development for over a decade.

He has developed a cancer drug, was awarded a patent on a headache treatment, and co-invented an allergy treatment that won the “Best New Product” award by chain pharmacies. Mr. Armstrong has managed pharmaceutical business development, including his interfacing with some 200 pharmaceutical and biotech companies, and has directed many clinical research programs.

He was an Associate Professor of international business in Japan.

Mr. Armstrong’s undergraduate education was at Humboldt State University, CA, USA with a BA degree in International Business and Biology studies. Spanish/economics studies in Guatemala. French studies University Laval, Quebec, Canada. BA in French, in France. Graduate school at University of California at Santa Barbara, Statistics studies. Management program in Japan. San Francisco State University, CA, USA, with an MBA in International Business.

Michael F. Holick, Ph.D., M.D

Expert Vitamin D & Science Consultant

Professor of Medicine, Physiology and Biophysics; Director of the General Clinical Research Unit; and Director of the Bone Health Care Clinic and the Director of the Heliotherapy, Light, and Skin Research Center at Boston University Medical Center.

Dr. Holick has made numerous contributions to the field of the biochemistry, physiology, metabolism, and photobiology of vitamin D for human nutrition. Dr. Holick has established global recommendations advising sunlight exposure as an integral source of vitamin D. He has helped increase awareness in the pediatric and medical communities regarding vitamin D deficiency pandemic, and its role in causing not only metabolic bone disease, and osteoporosis in adults, but increasing risk of children and adults developing preeclampsia, common deadly cancers, schizophrenia, infectious diseases including TB and influenza, autoimmune diseases including type 1 diabetes and multiple sclerosis, type 2 diabetes, stroke and heart disease.

Dr. Holick is a Diplomate of the American Board of Internal Medicine, a Fellow of the American College of Nutrition, and a member of the American Association of Physicians. He is the recipient of numerous awards and honors, including the General Clinical Research Centers Program Award for Excellence in Clinical Research from NIH, American College of Nutrition’s Communication Media Award, Best Docs in America, the Linus Pauling Functional Medicine Award from the Institute for Functional Medicine and the Linus Pauling Prize for Human Nutrition. Dr. Holick serves on a number of national committees and editorial boards and has organized and/or co-chaired several international symposia. He served as the chair for the Endocrine Society’s Practice Guidelines on Vitamin D. He has authored more than 400 peer-reviewed publications, and written more than 200 review articles, as well as numerous book chapters. He has acted as editor and/or co-editor on 13 books, and has written The UV Advantage in 2004 and The Vitamin D Solution in 2010 and helped develop the app