Ignatios Liapis graduated from the Aristotle University of Thessaloniki (AUTH) School of Veterinary Medicine in 1985 and has been working as a veterinarian for companion animals since 1987. In 1990, he established the second opinion veterinary clinic Clinique Veterinaire, specializing in soft tissue surgery, ultrasounds (the first to install an ultrasound device for companion animals in Greece in 1993), gastroenterology, endoscopy (the first to install flexible endoscopes in Greece, other than a university, in 1994) and ophthalmology. In 2012, he received a Diploma in Veterinary Ophthalmology from the National Veterinary College of Toulouse, France.
He has since focused his scientific and professional interest in canine and feline ophthalmology. He has published papers in Greek and foreign scientific journals. He has also been an invited speaker in Greek and international conferences. He is a member of the European Society of Veterinary Ophthalmology (ESVO), the French Veterinary Association for Companion Animals (AFVAC), as well as a founding member and the General Secretary of the Hellenic Companion Animal Veterinary Society (HCAVS).