LaMonte graduated from the Santa Clara University in 1968.He was a nose tackle on the varsity football team in 1964 and 1965.In 1970, he received a master's degree in diplomatic history from San Jose State University. Lamonte taught history at Oak Grove High School from until 1973, and moved onto to teach at Santa Teresa High School until 1992. He was part of the coaching staff of the football programs at both schools. In 1981, one his former students, Rich Campbell, asked him to represent him as Campbell would go on to be selected in the first round of the 1981 NFL Draft by the Green Bay Packers. He would represent former San Francisco Bay Area athletes including Dave Steib, Robin White, Mervyn Fernandez, and Nick Vanos. On March 8, 1985, LaMonte negotiated the longest baseball contract at the time with the Toronto Blue Jays for Steib.In 1992, Mike Holmgren asked LaMonte to represent him to negotiate a deal for the heading coaching position for the Green Bay Packers.He retired from teaching that year, and moved onto to focus on representing NFL coaches, and would help expand the role of NFL head coaches by also being involved in personnel decisions. Already the head football coach of the Philadelphia Eagles since 1999, LaMonte negotiated a contract to expand the duties of his client, Andy Reid, to become executive VP of football operations.

Some of LaMonte's clients include:

• Mike Holmgren (Cleveland Browns President)
• Brad Childress (Minnesota Vikings Head Coach)
• John Fox (Carolina Panthers Head Coach)
• Josh McDaniels (Denver Broncos Head Coach)
• Andy Reid (Philadelphia Eagles Head Coach/Executive VP)
• Mike Singletary (San Francisco 49ers Head Coach)
• Steve Spagnuolo (St. Louis Rams Head Coach)
• Charlie Weis (Kansas City Chiefs Offensive Coordinator)
• Mike Martz (Chicago Bears Offensive Coordinator)
• Mike Nolan (Miami Dolphins Defensive Coordinator)
• Al Saunders (Baltimore Ravens Offensive Consultant)
• Gunther Cunningham (Detroit Lions Defensive Coordinator)
• Leslie Frazier (Minnesota Vikings Defensive Coordinator)
• Mike Heimerdinger (Tennessee Titans Offensive Coordinator)
• Mike McCoy (Denver Broncos Offensive Coordinator)
• Marty Mornhinweg (Philadelphia Eagles Offensive Coordinator)
• Pat Shurmur (St. Louis Rams Offensive Coordinator)
• Tom Heckert (Cleveland Browns General Manager)
• Chris Polian (Indianapolis Colts General Manager)
• Mark Dominik (Tampa Bay Buccaneers General Manager)
• Rick Smith (Houston Texans General Manager)
• Chris Carpenter (St. Louis Cardinals Pitcher)
• Pat Hentgen (Former Toronto Blue Jays Pitcher)
• Dave Steib (Former Toronto Blue Jays Pitcher)
• Joe Nedney (San Francisco 49ers Placekicker)
• Jon Gruden (ESPN Analyst for Monday Night Football)

LaMonte's book on leadership was entitled Winning the NFL Way, and was released in 2005.