This is the 9773rd most frequent Russian word.
энергетиков
"Энергетиков" translates to "energy specialists" or "power engineers" in English.
Here, 'энергетиков' refers to 'energetics engineers' or 'professionals in energetics' in a plural form in the genitive case.
Институт энергетиков обучает специалистов в области энергетики.
The Institute of Energetics trains professionals in the field of energy.
Here, 'энергетиков' refers to 'energy specialists' in a plural form in the genitive case, indicating they are the focus of the gathering.
На конференции собралось множество энергетиков, обсуждающих возобновляемые источники энергии.
Many energy specialists discussing renewable energy sources gathered at the conference.
In this sentence, 'энергетиков' refers to 'energy professionals' and is in the plural genitive case as part of a possessive construction ('best of the company').