According to Army standards, the application of military expertise should be certified by whom?

The application of military expertise is certified by Army professionals because they possess the necessary experience, qualifications, and understanding of Army standards and protocols. This group includes individuals who have a deep knowledge of military operations and the specific competencies required for various roles within the Army. Their certification ensures that the standards of proficiency and expertise are upheld, reflecting the Army's commitment to maintaining a highly skilled and capable force.

Senior Soldiers may provide mentorship and guidance but do not hold the formal authority to certify military expertise as Army professionals do. External auditors typically assess compliance with external standards rather than the specific military competencies required for operational effectiveness. Similarly, while the Department of Defense oversees the military as a whole, it does not directly certify individual military expertise at the Army level; this responsibility lies with designated Army professionals who are intimately familiar with the relevant technical and tactical requirements.