Aegis Energy is seen as one of Marathon Engine Systems's top competitors. Aegis Energy's headquarters is in Holyoke, Massachusetts, and was founded in 1985. Like Marathon Engine Systems, Aegis Energy also works within the Industrial Goods & Services industry. Aegis Energy generates 206% of Marathon Engine Systems's revenue.
Tecogen has been one of Marathon Engine Systems's top competitors. Tecogen was founded in 1960, and its headquarters is in Waltham, Massachusetts. Like Marathon Engine Systems, Tecogen also works within the Industrial Goods & Services field. Tecogen has 60 more employees than Marathon Engine Systems.