Erwin A. Nepomuceno is a Senior Partner in the Dallas and Phoenix offices of Manning Kass. He is the leader of the Workers' Compensation practice, co-leader of the Military and Veterans Law practice, and a first-generation Filipino American immigrant. He attended the University of California, Irvine and graduated from Loyola Law School while serving as a non-commissioned officer with an infantry unit in the United States Marine Corp Reserves.

Mr. Nepomuceno was meritoriously promoted to Private First Class during boot camp, a promotion given to the top 10% of recruits in a company. After another meritorious promotion as a non-commissioned officer, he became leader of an infantry squad with a complement of both mortars and machine guns for two years. Mr. Nepomuceno was put in charge of all security for a firebase during wargames in Camp Lejeune, and discharged as a Sergeant.

Mr. Nepomuceno was admitted to the California Bar in 1989. During law school, he was a certified law clerk with the Los Angeles County District Attorney's Office in West Covina.

Mr. Nepomuceno began his legal career practicing insurance defense, then focused his legal practice on the area of workers' compensation defense against accepted and fraudulent claims. He was a member of the Los Angeles County District Attorney's Task Force Against Workers' Compensation Fraud in 1993, and served as an adjunct professor at Western State University School of Law and Southern California School of Business and Law, where he taught legal research and writing. Along with handling his own case load and supervising the firm's Workers' Compensation Department, he also sat as a judge pro-tempore in the Orange County Municipal Court. He is a green belt in Kung Fu San Soo; a mediocre motorcycle mechanic and gunsmith; plays tournament paintball; competes in combat handgun competition, and has written articles for Action Pursuit Games, a national paintball magazine.

Mr. Nepomuceno was named a 2005–2006 and 2013–2015 Super Lawyer, and is a California State Bar certified workers' compensation specialist. He also served as president of the California Workers' Compensation Defense Attorney' Association for 2015.