United States Attorney General Caleb Cushing, with President Franklin Pierce's direction, officially conveyed the government's thanks to Joachimsen for his abilities in discharging his duties.
He tendered his resignation due to differences that grew out of the Kansas-Nebraska question and returned to his law practice.
He was then honorably discharged from his military service and was made Brevet Brigadier General by Governor Reuben Fenton.
He regularly included to, among other publications, the New Yorker Staats-Zeitung, the Albany Law Journal, and The Jewish Messenger.
His wife was Carolina C., a poet who was an assistant editor of the Philadelphia Jewish Record and president of the Home for Infirm and Indigent Hebrews.