At international level, he is also a Europe's Strongest Man silver (2010) and bronze (2017) medalist, a two time World's Strongest Man bronze medalist (2007 and 2011), a World's Strongest Viking bronze medalist (2014), a two time Arnold Strongman Classic 8th-place winner (2011 and 2012), a World's Ultimate Strongman 9th-place winner (2018), and the 5th most prolific strongman contestant in history having competed in more than 90 international competitions, winning 4 of them throughout 17 years.

His training schedule has been described as "ferociously unforgiving" and he has espoused the benefits of visualisation techniques saying "you can't get by without it.

After winning his heat, finishing ahead of 1998 World's Strongest Man winner Magnus Samuelsson, Hollands produced arguably the best performance of his entire strongman career in the final.

In 2010, Hollands had series of podium finishes in the Strongman Champions League, including a win in Ireland (tied with Žydrūnas Savickas).

In June 2010, Hollands competed at the Europe's Strongest Man contest and placed in 2nd, though he injured his bicep in the process.

[8] In September 2010, Hollands recovered from his bicep injury and was able to compete at the 2010 World's Strongest Man contest where he made the final for the fifth consecutive year, and finished in 8th place.

[11] In November 2019, Hollands won the 2019 World's Strongest Man Masters competition held at the Official Strongman Games in Daytona, Florida.

[12] After withdrawing from the 2021 World's Strongest Man, after sustaining an injury during the loading medley, Hollands announced his retirement from Strongman.

He stepped on stage at 135 kg (297 lbs) at approximately 5–6% body fat – measured at 1 week out by a sports scientist using both callipers and bodpod technology at Canterbury Christ Church University.