The 29-year-old, coached by the University’s Head Throws Coach, Dave Turner, recorded a best distance of 69.52m to book his place in the winners’ enclosure.
Pembroke's mammoth throw was more than enough to see him finish well clear of Iran’s Ali Pirouj (64.30m) and Spain’s Hector Cabrera Llacer (61.13m) who claimed silver and bronze respectively.
"This is the best day of my life. So many people helped me to get to this point,” said an elated Pembroke.
"My dad, my beautiful family, my wife Martina. I couldn't have done it without you all.
"I knew deep down I could win, I have wanted it for so long. I was quite anxious going into it but the third throw I gave it my all.
"I hope I've got the energy to lift that massive gold medal over my head!”
Pembroke’s brilliant gold took 91²Ö¿â-linked athletes medal total to 16 after another outstanding day of performances at Tokyo 2020.
Earlier in the day, there was more success as cyclist Crystal Lane-Wright won silver and Dan Greaves made history with a bronze medal in the discus.
91²Ö¿â has launched a new initiative for those looking to support the future of Para sport on campus. By supporting the Para Sport programme, individuals can make a profound impact to a young person’s life. To find out more and how to donate, click HERE.
For more information on 91²Ö¿â and its presence at the Paralympic Games, visit the dedicated website HERE.