Teachenor sent the melody and lyrics to various U.S. military bands for them to suggest arrangements and finishing touches, and the bands submitted 12 different arrangements for consideration. Teachenor then collaborated with Chief Musician Sean Nelson, a trombonist and staff arranger with the United States Coast Guard Band. Nelson completed the song with harmonies and orchestration, adding more than 30 instrumental parts. "I became familiar with the other branches' songs, but I wanted this one to have its own modern spin to reflect what the Space Force is — modern, new, and very advanced," Nelson said. The U.S. Coast Guard Band recorded Nelson's arrangement of the song for review by the Space Force. After months of coordination between the Space Force and Coast Guard Band to further develop and revise the song and variations of it, the Space Force chose the final version of "Semper Supra."
