Page 38 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each of the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ D. Raymond Riddle D. Raymond Riddle, Chairman of the Board and Chief Executive Officer, and Director /s/ Don W. Hubble Don W. Hubble, President and Chief Operating Officer, and Director /s/ J. Robert Hipps J. Robert Hipps, Senior Vice President, Finance (Principal Financial and Accounting Officer) /s/ John A. Bostater John A. Bostater, Vice President and Controller /s/ David Levy David Levy, Executive Vice President, Administration and Counsel, and Director Dated: November 17, 1995 Page 39 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ Jesse Hill, Jr. Jesse Hill, Jr. Dated: November 17, 1995 Page 40 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ Robert M. Holder, Jr. Robert M. Holder, Jr. Dated: November 17, 1995 Page 41 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ F. Ross Johnson F. Ross Johnson Dated: November 17, 1995 Page 42 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ James C. Kennedy James C. Kennedy Dated: November 17, 1995 Page 43 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/Donald R. Keough Donald R. Keough Dated: November 17, 1995 Page 44 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ Bryan D. Langton Bryan D. Langton Dated: November 17, 1995 Page 45 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ Bernard Marcus Bernard Marcus Dated: November 17, 1995 Page 46 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ John G. Medlin, Jr. John G. Medlin, Jr. Dated: November 17, 1995 Page 47 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, her true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for her in her name, place, and stead in her capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /S/ Betty L. Siegel Betty L. Siegel Dated: November 17, 1995 Page 48 Exhibit 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints David Levy and J. Robert Hipps, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of National Service Industries, Inc., to file a registrant's annual report on Form 10-K for the fiscal year ended August 31, 1995, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. /s/ Erwin Zaban Erwin Zaban Dated: November 17, 1995