Judge Algeo is Director of Training & Education at the State's Attorney's Office for Montgomery County, MD.  He also serves as an instructor of Constitutional Law and Criminal Law at the Montgomery County Police Academy.  In November 2016 he was appointed by Governor Larry Hogan as Chairman of the Maryland Racing Commission. He was a Judge on the Circuit Court for Montgomery County from 2005 until his retirement in July, 2014. His judicial career began in 1999, as an Associate Judge for the District Court of Maryland, where he served for six years. Prior to that, he was Division Chief of the Felony Trial Unit in the Montgomery County State's Attorney's Office for 11 years and also spent time in private practice with the District of Columbia law firm, Jordan Coyne and Savits.

Judge Algeo is an Adjunct Professor at the Washington College of Law of American University and Montgomery College. He is the author of Crimes and the Constitution; a criminal law text used at Montgomery College. In addition, he has taught lectures and seminars for the National College of District Attorneys, the Maryland State Bar Association, the Montgomery County Bar Association, the Maryland Trial Lawyers, and the Maryland State's Attorney's Association. He has been a guest panelist on Montgomery Channel 21, Law School for the Public.

In 2010, Judge Algeo presided over the case State v. Renee Bowman. The defendant was a woman convicted of murdering two of her adopted children and storing their bodies in a freezer. Ms. Bowman is serving two life sentences without the possibility of parole. In 2016, he along with State's Attorney, John McCarthy prosecuted State vs. Scott Tomaszewski who violently murdered his neighbors, Richard and Julianna Vilardo and fled to Alaska. The Defendant was sentenced to life without parole.

Judge Algeo is a Vietnam Veteran. He is a recipient of The Daily Record, Leadership­ In-Law Award, the Washington College of Law Distinguished Alumni Award, the Montgomery College Service Award, and Drawing the Line Community Service Award.  He has also received an award as "Instructor of the Quarter" at the Montgomery County Police Academy.  He was recently recognized at an awards dinner at the National Press Club in Washington D.C. for his 25 years teaching in the Trial Advocacy Program at the Washington College of Law.