Neil M Gorsuch is an Associate Justice of the Supreme Court of the USA. Mr Gorsuch's biography is available via the Supreme Court's website. The court has a Chief Justice - John G Roberts - and 8 Associate Justices. Mr Gorsuch was appointed to fill the vacancy left by the death in February 2016 of Associate Justice Antonin Scalia.
Following a "Confirmation Hearing", Mr Gorsuch was confirmed by the United States Senate 54 votes to 45 - see this article where the process is described.
Justices of the Supreme Court of the USA do not have fixed retirement ages. The longest serving member of the court at this time is Anthony Kennedy appointed in February 1988.
The longest serving justice in the history of the court is William O Douglas who sat from April 1939 to November 1975.