In 1991, she finished from St. Joseph's Convent in San Fernando, Trinidad and Tobago with GCE Advanced Level.
In 1994, Althea Alexis-Windsor received her Bachelor of Laws and Letters (LLB) degree from the University of the West Indies.
[3] In 1996, she finished from Hugh Wooding Law School with the Commonwealth Caribbean's Legal Education Certificate.
In September 2013, she was appointed judge of the High Court of Trinidad and Tobago, " adjudicating on complex matters of criminal law and procedure in pretrial submissions and on-going trials of murder, sexual offences and narcotics.
[4] In her application speech in the ICC-ASP "public roundtable" discussion she named three "I-believes": "I believe in the ability of the law to help build fearless and justice in a society.