Seán is a University lecturer with over 20 years of experience in teaching. He has a PhD in IT and is Oracle-certified in Java at the Professional level (OCP). In his daily work, he teaches Java on a bespoke Master's programme for a highly regarded software company. He has a YouTube channel called 'Let's Get Certified' that teaches Java at all levels and prepares candidates for Java certification. He also has similar courses on Udemy and Tutorialspoint. Outside of work he enjoys tennis, walking, reading and nature.