Arnaud joined the Dynamo in 2017 after serving as an assistant coach for D.C. United in 2016. Arnaud was one the the most respected players in Major League Soccer throughout his 14-year career (2002-15). A native of Nederland, Texas, he starred at West Texas A&M before playing his first 10 professional seasons with the Kansas City Wizards/Sporting Kansas City, winning the 2004 Lamar Hunt U.S. Open CUp and reaching the MLS Cup Final the same season. Known for his leadership as a player, the midfielder joined the Montreal Impact in 2012 and was their first captain for their debut MLS season and played two seasons in Quebec. He helped lead United to the 2014 Eastern Conference regular season title in his first season after they won just three games in 2013.
As a player, Arnaud appeared in 351 career regular-season games, eighth among field players in MLS history, and registered 50 goals and 46 assists. He is tied for ninth in league history with 316 career starts and tenth with 28,462 minutes. Arnaud appeared in 17 playoff games in nine playoff seasons and was the most fouled player in league history, drawing 746 fouls. The Texan also made seven appearances for the U.S. Men's National Team.