Feaver was educated at Bedford School, an independent school in Bedford, England, whose origins date to 1552. The school was established through a charity endowed by Sir William Harpur, and it has long been one of the established independent schools of the English Midlands.
He later studied law at Bristol University before entering the English legal profession, a path that linked his early education in England with a career based in London.
Feaver studied law at Bristol University, where he completed a Bachelor of Laws degree in 1978. The University of Bristol received its royal charter in 1909, but law was not taught as an independent degree subject at that time. Legal education developed later, and the Law Faculty was founded in 1933, when the LL.B. degree became available.
Following his degree, he trained with a London solicitors' firm and was admitted to practise in England in 1981. The qualification placed him within the English solicitors' profession, which combined articled training in private practice with the professional standards overseen by the Law Society.
Feaver began his legal career as a trainee solicitor at Speechly Bircham in 1979 and remained with the firm as a solicitor until 1983. Speechly Bircham was formed in 1974 through a merger of Speechly, Mumford & Soames and Bircham & Co, firms with origins in Dalrymple, Drake & Co., founded by Francis Thomas Bircham in 1845, and Speechly & Co., founded in 1875 by Thomas Speechly. The London firm grew to more than 200 lawyers and worked on financial services, private wealth, technology, real estate, and construction matters before merging with Charles Russell in November 2014.
From 1983 to 1985 he worked as a solicitor in the legal department of NatWest Bank. National Westminster Bank had been formed in 1970 through the merger of the National Provincial Bank and the Westminster Bank, and its legal department handled the bank's legal matters within a large retail and commercial banking organisation.
From 1985 to 1996 he was a partner at Faegre & Benson, the Minneapolis-based firm whose name later became Faegre Baker Daniels, as recorded in his professional profile. The firm was a US practice, and its London connection with the English firm Hobson Audley later developed into a formal alliance. Feaver then became a partner at Andersen Legal from 1996 to 2002, a period in which the legal practice was associated with the Andersen professional services network.
From 2002 to 2009 he was a partner at Lawrence Graham, a London firm with origins dating back to the eighteenth century. The firm adopted the name Lawrence Graham in 1990, moved its headquarters to More London in 2007, and merged with the Birmingham-based firm Wragge & Co in 2014. A Law Gazette report noted that Lawrence Graham had recruited him as a company and commercial partner. He was then a partner at Marriott Harrison from 2009 to 2010. The firm was founded in the mid-1980s with roots in media and technology, and it later concentrated on corporate and venture capital work from its base at 80 Cheapside.
In 2010 he joined Keystone Law as a consultant solicitor. Keystone Law was founded in 2002 under the name Lawyers Direct and operated a technology-based model in which lawyers worked flexibly rather than from a conventional office. His Legal 500 profile describes him as a partner at Keystone Law, and the firm's current London association continues to be reflected in his professional profiles.
He also has a documented association with Hobson Audley, a City of London firm that was a partner-based practice. The firm merged with Hopkins & Wood to form a 14-partner firm and later became part of a multinational partnership with Faegre & Benson, which provided English law services to US clients.
