He expects to take on work shortly through the firm, called Landmark Financial Solutions.
Landmark plans to offer consulting to the wealth management industry internationally but will focus initially on both the UK and Europe.
Jelley left Skandia earlier this year having re-joined in February. He had joined SJP in May 2011 after spending 17 years with Skandia in a range of technical and product marketing roles, including head of tax and financial planning.
Jelley says: “I am pleased to have experienced so much interest from across the market and am looking forward to sharing my experience more widely in contract, interim or permanent positions”.