Coaching Staff


Marie McSweeney, Head Coach

Coach Marie McSweeney

Marie McSweeney is Head Coach of the Tidalwaves Swim Team as well as the Head Coach of Tam Masters, an adult swim team recognized for its excellence in the US. Marie has developed Tidalwaves into a foundational swim and athletic experience for thousands of children in our community -- in fact, many of our team's current parents fondly remember being coached by Marie when they were young! 

Marie has the ability to encourage, motivate, and support swimmers, young and old, in a POSITIVE way that focuses on transferring her love of the sport to her swimmers. On top of that, she has an unbelievable memory for names and swim times. You, too, will marvel at the way she can tell them all apart even when they are all wet! This will be Marie's 30ish year with Tidalwaves. 

Have a coaching question or concern about your child?

Coach Marie is always open to talking to you. However, during practice and meets Marie needs to be focused on ALL the kids in the water. This is for safety reasons as well as to ensure all swimmers get the most out of their practice and meet experience. The best way to let Marie know you have a coaching question or concern is via:

Karen Miller, Assistant Coach

Karen Miller began swimming competitively between the ages of 9-16 for West Coast Aquatics in San Jose. After college, she started Masters swimming and completed many triathlons, developing her love of open water swimming. Karen's coaching career later started in Texas with the Dallas Mustangs. She coached all ages for 14 years until returning to CA to be closer to family. Karen is excited to be giving back to the sport she loves!

Corey Dunne, Assistant Coach

Corey was raised in Corte Madera and swam for Tidalwaves for almost 10 years. After graduating college, he returned to his roots and wanted to be apart of his old team again, this time as a coach. When he isn’t coaching, he works in Silicon Valley as a defense contractor for the U.S. Navy. His favorite stroke is butterfly and he is looking forward to helping out the team.

Alex Sennhenn, Assistant Coach

Alex Sennhenn started competitive swimming three years ago when he swam for Warren Lager on the College of Marin team. After two successful seasons swimming for Warren, Alex transitioned to US Masters, where he currently competes with the Tamalpais Aquatic Masters (under Coach Marie!).

Megan Bosely, Assistant Coach

This will be Megan’s 11th year on the Tidalwaves Swim Team! She was born and raised in the San Francisco Bay Area, where she competed on Tidalwaves for 10 of those years. She has also spent a few of those years volunteering in the Novice program while simultaneously attending Redwood High School and swimming for their Swim Team. While not on the pool deck, you can find Megan either studying, hiking, or continuing her love of swimming at local clubs around the area.