Berwin became a solicitor, taking his articles at a firm in the City of London and then practising as a commercial lawyer at
Herbert Oppenheimer, Nathan & Vandyke. He founded Berwin & Co in the mid-1960s. The firm specialised in corporate finance, mergers and acquisitions, and tax. Berwin & Co merged with Leighton & Co in 1970 to form Berwin Leighton, and moved to
Adelaide House on the north bank of the River Thames beside
London Bridge. Berwin Leighton merged with Paisner & Co in 2001 to form
Berwin Leighton Paisner. In addition to his legal practice, Berwin held various positions in the City of London. He became a director at the merchant bank
N M Rothschild & Sons in 1966, was a deputy chairman at
British Land, and a director of
Wickes. After a period working outside the law, Berwin set up a new law firm,
SJ Berwin, in 1982. He remained the senior partner until his death in 1988. The firm merged with
King & Wood Mallesons in 2013. The SJ Berwin Chair of Corporate Law at
Cambridge University was endowed in his honour; the fundraising was so successful that a second innominate chair was also endowed at the same time. ==References==