"It's great to have made that next step in my career, to get experience of international rugby and my Wales cap" said King.
"I worked really hard last season and was fortunate enough to be a part of the Six Nations squad.
"I didn't get capped but it was a fantastic learning experience for me, then to not only go to Japan in the summer but to play the full 80 in both tests was something I'm really proud of.
"To play international rugby for Wales is a dream come true. Just to get the opportunity to come down here from north Wales five years ago to try and establish myself with the Ospreys was a big personal achievement. To get my first pro contract, then sign a new long-term one that gives me security was fantastic.
"Playing for Wales in the summer topped that all off."
King made his regional debut as a teenager back in October 2009 and four years later, he has now established himself as a key member of the Ospreys squad.
Last year saw the Ospreys just miss out on a play-off place and looking ahead to the new season, King says the squad are looking to make up for that disappointment.
"Obviously we missed out on the play-offs which was really disappointing, so we want to make sure we get back into that mix," he said.
"After doing so well the previous season, it was even more disappointing as we wanted to defend our title. The expectation here is that we are always competing at the top end of the PRO12. We've won it more than anyone else and that brings pressure.
"We've got boys coming back in from a good summer, especially the Lions and the boys who've been with Wales U20, and competition for places will be really hard. That's why it's important to do very well in pre-season.
"That competition can hopefully push us on to make up for the disappointment at the end of last season."
On a personal level, the only target King has set himself is to ensure he rises to the challenge of competing within a hugely competitive squad.
"I just want to play as many games as I can for the Ospreys" he said.
"I've been involved a lot over the last two years. Last season I started more games and I want to really establish myself this season - be that in the back row or a second row position.
"Being versatile has to be beneficial to me. It all depends on who you've got available in the squad. But if you can fit into more than one spot to a good standard then you will have more opportunities.
"I just want to use it to my advantage and to help the team by playing where I'm needed."