1st Sgt. Frank O. Robinson, Company A 1st sergeant, Headquarters Battalion, native of Baltimore, Md., took the responsibility of A Co., January, 2015. He has served nearly 20 years in the Marine Corps and hopes to continue to be a role model for all Marines. - 1st Sgt. Frank O. Robinson, Company A 1st sergeant, Headquarters Battalion, native of Baltimore, Md., took the responsibility of A Co., January, 2015. He has served nearly 20 years in the Marine Corps and hopes to continue to be a role model for all Marines.