I'm sure you can do your own research.
The Constitution does not specify qualifications for Justices such as age, education, profession, or native-born citizenship. A Justice does not have to be a lawyer or a law school graduate, but all Justices have been trained in the law.
https://ballotpedia.org/Ketanji_Brown_Jackson
She went to Harvard Law
and
2021-present: Judge, United States Court of Appeals for the District of Columbia Circuit
2013-2021: Judge, United States District Court for the District of Columbia
2010-2014: Vice chair/Commissioner, United States Sentencing Commission
2007-2010: Of counsel (Private practice), Morrison & Foerster LLP, Washington, D.C.
2005-2007: Assistant federal public defender, Office of the Federal Public Defender
2003-2005: Assistant special counsel, United States Sentencing Commission
2002-2003: Associate, The Feinberg Group, LLP
2000-2002: Associate, Goodwin Procter LLP, Boston, Mass.
1999-2000: Law clerk, Hon. Stephen Breyer, Supreme Court of the United States
1998-1999: Associate, Miller, Cassidy, Larroca & Lewin LLP, Washington, D.C.
1997-1998: Law clerk, Hon. Bruce Marshall Selya, U.S. Court of Appeals for the 1
st Circuit
1996-1997: Law clerk, Hon. Patti Saris, U.S. District Court for the District of Massachusetts[26]