ESLER provides protection and controls engineering services to clients ranging from utilities seeking ways to overhaul aging systems at existing stations to clients seeking new designs or protection system studies to support their new substation facilities. 

ESLER delivers deep expertise in performing industry-leading protection and controls design support for transmission down to distribution level voltages protecting and controlling a wide array of equipment from substation buses to busbar, circuit breakers, lines, capacitor banks, reactors, transformers, and power generators. To ensure human safety performance, ESLER also provides arc flash evaluation and mitigation support for distribution and power generation facilities.