Mohammed , J.H. and Al-Sulaifani , N.M.A. 2026. Psychological Engineering and its Contribution to Enhancing the Sustainable Human Resources: An Analytical Research of the Opinions of a Sample of Workers in Private Hospitals in Duhok Governorate. KOYA UNIVERSITY JOURNAL OF HUMANITIES AND SOCIAL SCIENCES. 9, 1 (Mar. 2026), 327–338. DOI:https://doi.org/10.14500/kujhss.v9n1y2026.pp327-338.