Mike Rivera
Head Coach
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Mike Rivera was named Head Coach of the Bolles Track & Field program in June 2019. Rivera joined the Bolles staff in 2013 as a Chemistry teacher and head boys’ cross country coach. He also joined the Residential Life Staff in 2015.

Rivera led the girls' track and field team to back-to-back state titles in 2021 and 2022, garnering Florida Dairy Farmers Class 2A Girls' Coach of the Year honors both seasons and US Track and Field and Cross Country Coaches Association Florida Girls' Coach of the Year honors in 2021.

He has led the boys' cross country team to its most success in the last three decades. The 2017 and 2018 seasons produced consecutive state titles, Nike Cross Nationals berths, individual cross country state titles and coach of the year honors by both the Florida Dairy Farmers Sports Awards and U.S. Track & Field and Cross Country Coaches Association. Rivera led the boys' cross country team to another state title in 2021 and to runner-up finishes in 2016, 2019 and 2020.

On the track, the boys’ distance runners were instrumental in Bolles winning its second-ever boys’ track and field state title in 2019, winning individual titles in the 800, 1600 and 3200-meter runs—the first for the 1600 and 3200 in program history. Rivera has coached runners to numerous school records and individual honors as well.

Prior to Bolles, Rivera served on the Nease High School staff in the I.B. program as well as head coach of the boys and girls cross country teams and an assistant track coach. In 2009, he was honored as Boys’ Cross Country Coach of the Year by Jacksonville Running Company and Mizuno. Rivera and his family moved to Jacksonville from Indiana where he was head girls track coach at Columbus North High School in 2006 after serving as an assistant track coach from 2001-05. Rivera also assisted the Columbus North cross country program, helping the boys’ team to state titles in 2002 and 2003, and working with Indiana Track and Cross Country Hall of Fame coach Rick Weinheimer.

A successful runner, Rivera began his collegiate career at Notre Dame where he was a member of the Fighting Irish cross country and track teams in 1990 and 1991. He transferred to Hanover College where he set school records in the outdoor 3,000-meter run (8:57.10), 3,000-meter steeplechase (9:25.75), and indoor 1,000-meter run (2:31.20). Rivera qualified for the NAIA national championships in the steeplechase in 1992 and was named Hanover’s Outstanding Student-athlete in 1994. He earned a B.A. in Chemistry from Hanover and a M.Ed. from Indiana Wesleyan University.

He and his wife, Jodi, have three children- Bolles graduates Chase '19 and Layne '21, and current student Miles '24.

Tony Ryan
Assistant Coach

Tony Ryan joined the Bolles faculty in 1997. He teaches 11th grade English and serves as an 11th grade advisor. Ryan served as the boys' cross country head coach from 1997-2012 and took over as head coach of the girls' squad in 2003.

Ryan has led the girls' cross country teams to nine of the program's state record 13 state titles including four straight from 2012-15 and back-to-back titles in 2020 and 2021. Ryan's 12 career state cross country titles ranks among the top all-time in Florida cross country history. Ryan's teams have continued a streak of 14 consecutive top-2 finishes at the state meet and 28 straight top-5 finishes. He has guided the girls' program to seven state-runner finishes in his tenure, as well as several top-10 state finishes for the boys' teams.

Ryan served as the boys' and girls' track and field head coach from 1998-2003. He led the boys' team to a state title in 1999, a state runner-up finish in 2003, and six straight district titles from 1998-2003. Under Ryan, the girls' track and field team was state runner-up in 1998 and district champions in 2000 and 2003. Ryan returned to the upper school track and field program as an assistant coach focusing on the distance runners in 2006 and helped the girls' team win the program's first state title in 2014 and two more in 2016 and 2017.

Prior to Bolles, Ryan led the Bishop Kenny girls' cross country team to three straight state titles from 1994-96 and consecutive district titles from 1992-96. Ryan guided the BK boys' and girls' track and field teams to district championships during his two years as head coach, with the girls' team placing third at the state meet in 1997.

Ryan is a graduate of the University of North Florida, earning bachelors and master's degrees in English. Ryan competed in cross country and track for the Ospreys, earning NAIA All-American honors in indoor and outdoor track in 1988. He was the 1987 Florida Intercollegiate cross country champion in an unofficial collegiate state championships record time of 24:30. Ryan still holds the school record at 5,000 meters (14:12.5). He was also teammates with fellow Bolles faculty member Cormac O'Riordan. Ryan transferred to UNF after two years at Austin Peay State University in Clarksville, Tennessee. While at Austin Peay, he won Ohio Valley Conference titles in the 5,000 and 10,000 meter runs in 1986, won the conference title in cross country in 1986, was the runner-up in the two mile run in the 1986 indoor conference meet, and was named Ohio Valley Conference Cross Country Runner of the year in 1986.

Ryan was born and raised in County Clare, just outside of Limerick, Ireland. He attended high school at Saint Munchin's College in Limerick, competing in cross country and track, as well as rugby and soccer. He helped the cross country team to a second place national ranking as a senior. Ryan's three children have attended Bolles: graduates Eilis ’11 and Audrey ’15 and current student Aidan ’23.

Mark Sieron
Assistant Coach

Mark Sieron has coached the Bolles throwers since 2007 and has helped guide some of the greatest throwers in school history.  His student-athletes include 24 district champions, 10 region champions, countless All-State throwers and three state champions. In 2019 and 2020, flrunners.com ranked the Bolles Throws group as the top throwers in the state of Florida, across all classifications.

When Mark began coaching at Bolles, he was returning to track & field after taking three decades away to help raise a family and build a busy law practice.  While in high school at Crestview (FL) High School, he was a 57-foot shot putter and 163-foot discus thrower.  In college at the University of Florida, Mark was on the varsity track and field team, lettering in the discus and hammer throw in the late 1970s. In 2013, Mark was honored with induction into Crestview High School’s Athletic Hall of Fame.

Mark and his wife Robyn have two grown children who graduated from Bolles: Grant ’07 and Kendall ’10 and a new grandson August.  When not coaching, Mark is a partner at the law firm of Aguilar & Sieron, P.A.