The Namibian-born prop's eligibility became a major talking point in 2022 after World Rugby ruled on his case, leaving the Rugby Football Union at risk of potential sanctions.
Schickerling had impressed during his time with Exeter Chiefs and on loan at Cornish Pirates, earning a call-up to England's squad in June 2022. He also caught the attention of then head coach Eddie Jones in training.
He featured in a non-cap match against Barbarians and travelled to Australia as part of a 36-man squad that summer. However, he never made an official appearance and was later omitted from the Autumn Nations Series squad.
The situation stemmed from a global rule change extending residency eligibility from three to five years. Although Schickerling had arrived in England in 2018, the ruling meant he was not eligible until November 2023.
Reflecting on the controversy, Schickerling to Scotland Rugby News: "It all happened really quickly. I saw someone tweeting that he's not eligible. So I kind of contacted my agent.
"We both followed all the rules of the RFU. I'm still not really sure where the mistake happened. It was really hard at the start I'd say because everything went away with one phone call before that Autumn Nations squad got announced.
"Then things didn't really go my way from then onwards. It took a while to get back on my feet. That's why I enjoy coming to Glasgow and having a fresh start and finding my feet again. I'm really enjoying my rugby at the moment again.
"Everything happened pretty quickly. I was on loan at Cornish Pirates, and played a few games at Exeter. I was fortunate enough to get the call-up. Everything happened in the space of a few months. You get on such a high and get knocked down so quickly.
"Obviously, I had a bit of time because I was still quite young. I was 23 years old. Obviously, a long way away from home. It was pretty difficult but you have to work past these things and look forward to the future because that's obviously what you can control."
Now at Glasgow Warriors, Schickerling is rebuilding his career and developing his versatility as both a loosehead and tighthead prop.
He admitted the transition wasn't easy at first:
"Obviously at the start it was a bit challenging," he admitted. "Your initial reaction is; I want to play my side, I want to make the stamp. But then you realise in the long run it benefits yourself as well because you can kind of figure out what the opposition wants to do.
"After a few games I've actually learnt a lot on that side so it's benefited me a lot. I'd say probably the angles you push and small details like that are the major differences."
At Glasgow, he has also benefited from working alongside Zander Fagerson, one of the world's top tighthead props, who recently returned from injury for Scotland national rugby union team.
"Since the start he's been very open with his knowledge," Schickerling said.
"He doesn't mind helping the younger boys. I think it's massive for a club like Glasgow where there's a lot of young boys coming through at the moment, to just learn.
"We'd all love even more support in the group obviously. Zander is always involved. Even though he's been injured, he always gets involved. So it's good to have someone like him around with his experience."