Marietta is the Co-Owner and Founder of Red Rock Volleyball Club overseeing all Red Rock locations. Additionally, she founded Kai Beach Volleyball Club.

Marietta brings more than 18 years of coaching experience as a head coach and offering invaluable college recruiting support. Her players have achieved notable success, securing spots at prestigious collegiate institutions including USC, UCLA, Harvard, Columbia, UC Santa Barbara, UC San Diego, Santa Clara, and many others.

During her tenure as head coach in Redwood City for over a decade where she founded Red Rock, Marietta guided all her teams (14s-18s) to Junior Nationals in the Open or National divisions. Notably, her Red Rock 18-1 team finished 1st in the Northern California region and earned a bronze medal at Junior Nationals. In the previous 2 seasons, she coached Red Rock 18-1 and both squads made very successful runs at Jr. Nationals in the 18 Open division with wins over the eventual gold medal winners and finishing 10th in the nation. Some of Marietta's other past successes as a head coach include: multiple Open medal finishes at Triple Crown NIT, Far Western’s Qualifier, and Pacific Northwest Qualifier, winning the NCVA Regional Championship, top 3 finishes in the Northern California region each year, and a 5th place finish at Junior Nationals.

This past season, Marietta led the 15-1 team in Danville to a 3rd place finish at the Regional Championships in Northern California, ranking 4th overall in points. Her team also secured 2nd place at the Pacific Northwest Qualifier, earning a spot in the Girls' Junior National Championship USA division in Las Vegas. In the preceding season, her 14-1 team in Danville achieved a top 5 finish in Northern California and qualified for the Girls' Junior National Championship National division in Chicago, a remarkable feat in only the club's second year in Danville area. In the inaugural season, her 14-1 team finished in gold (top 12) in the Northern California region.

Marietta previously led the varsity program at St. Ignatius College Prep in San Francisco with her husband David from 2016-2018, taking over the program in 2016 finishing 3rd in State in the Open division and a 27th National Ranking with a team that in the previous year in 2015 was ranked 447th in the country.

Marietta was born and raised in Louisville, KY and New Albany, IN and is the daughter of former professional basketball player, Mike Flynn. She won the Gold Medal at the 2000 Girls' Junior National Championship playing for Kentucky Indiana Volleyball Academy (KIVA). At New Albany High School, Marietta excelled as a four-year varsity volleyball player as an outside hitter on a nationally-ranked team (top 50). She led her team to an impressive 28-3 record her senior year earning league MVP. In her graduating class of 700 students, she received both the Overall Top Female Athlete Award and the Top Scholar-Athlete Award. 

At Santa Clara University, Marietta excelled academically, graduating Magna Cum Laude with a Bachelor of Science in Accounting and Finance, while also being a student-athlete playing libero during her collegiate career. Today, she is a finance leader in the biotech industry, a Certified Public Accountant, and small business owner of Red Rock VBC and Kai Beach VBC. Alongside her entrepreneurial endeavors, Marietta dedicates herself to coaching volleyball and cherishes being a devoted wife and mother. “Players often express their desire to follow in my footsteps, and witnessing their growth over the years—on the court, in academics, throughout their professional careers, and in their personal lives— is the most fulfilling aspect of my career. I aim to remain an inspiration to all student-athletes”

Marietta resides in Danville, where she enjoys quality time with her family, staying active at the gym, showering her two cats with endless love, and supporting her favorite sports teams…Go Warriors!!