A statement from the company said Dr Winnall had more than two decades of experience in developing cutting-edge technology for Baraja, Cochlear and the Australian Department of Defence.
Myriota chief executive and co-founder Dr Alex Grant said: "In hiring for this role we were looking for someone with a vision and belief in Myriota's global growth, as well as a passion for creatively solving problems and big thinking.
"Steve's deep industry knowledge, understanding of market needs, and customer-focused approach is the ideal mix of ability to both lead the engineering team and help realise Myriota's vision of global expansion. We're looking forward to Steve playing a significant role in the future of scaling global connectivity at Myriota.
Myriota's technology can pull data from anywhere. The company uses its R&D and patented technology, it uses its constellation of satellites and low-power IoT modules to offer battery life, affordability, easier scalability and strong cryptographic security.
Dr Winnall said: "Solving customer needs has always been a passion of mine throughout my career, and in my new role at Myriota my goal is to help end customers have access to secure, affordable data at scale in the areas that aren't currently serviced.
"I believe in the team's vision of bringing the entire world under Myriota's umbrella of coverage and have plans to help simplify the product design and development process for our customers to speed up go-to-market, ultimately making that vision a reality."
Prior to joining Myriota, Dr Winnall vice-president of Product Development at Baraja, a business that develops LiDAR for self-driving vehicles. Before that, he worked as the director of Product Engineering at Finisar for five years.
Dr Winnall has also worked at medical device company Cochlear, managing the development of its flagship Nucleus 5 Sound Processor that created a breakthrough in hearing performance.