Despite the government shutdown, the Employer Support of the Guard and Reserve remains fully engaged. ESGR is a Department of Defense agency that seeks to promote a culture in which all American employers support and value the military service of their employees. - Despite the government shutdown, the Employer Support of the Guard and Reserve remains fully engaged. ESGR is a Department of Defense agency that seeks to promote a culture in which all American employers support and value the military service of their employees.