Lewis was named secretary-manager of Southern League Division Two side Brentford in 1900,[1] leading them to the title and promotion to the Southern League Division One in the 1900/01 season. The Bees finished second-from-bottom in their first season in Division One, but held onto their status in the league after a relegation playoff with Grays United was called off before going into extra time.[2] Brentford finished bottom of Division One in 1902/03, but once again held onto their place in the league with a 7-2 relegation playoff victory over West London rivalsFulham.[3] He stepped down from the role in May 1903 and was replaced by Richard Molyneux.[1] Lewis covered the manager's position for Molyneux for part of the 1903/04 season, after Molyneux was suspended from football for attempting to buy a goalkeeper out of the army.[1] Lewis remained at Brentford as secretary until 1905.[4] He later returned to the club in an administrative capacity.[1]