Welsh joins the club having previously featured for Liverpool, Chester, Hull City, Preston, Tranmere & Grimsby.
He has played in both the Premier League and Champions Leagues with 350 football league games under his belt, and joins the club from Atherton Collieries.
"I would just like to say a big thank you to everyone at Atherton Collieries," Welsh shared on social media.
"A great club with a lot of good people involved in it. I wish you all the best for the season.
"I am delighted to sign for Stafford Rangers and can’t wait to get going now."
Sebbeh-Njie, 22, plays in the midfield and was with Kettering before ending last season at Stratford Town.
He featured in Stafford's friendly against Stafford Town, impressing the management team.
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