EXHIBIT 24 DIRECTORS' POWERS OF ATTORNEY POWER OF ATTORNEY RE GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY Know all men by these presents, that I, Andre Desmarais, a Member of the Board of Directors of Great-West Life & Annuity Insurance Company, a Colorado corporation, do hereby constitute and appoint each of D.C. Lennox and G.R. Derback as my true and lawful attorney and agent for me and in my name and on my behalf to, individually and without the concurrence of the other attorney and agent, sign my name, in my capacity as a Member of the Board of Directors of Great-West Life & Annuity Insurance Company, on Form 10-K Annual Reports of Great-West Life & Annuity Insurance Company to be filed with the Securities and Exchange Commission from time to time, and to any and all amendments thereto. IN WITNESS WHEREOF, I have hereunto set my hand this 10th day of March, 1998. /s/ Andre Desmarais Member, Board of Directors of Great-West Life & Annuity Insurance Company Witness: /s/ Lisa Gagnon Signature Lisa Gagnon Name Printed POWER OF ATTORNEY RE GREAT-WEST LIFE & ANNUITY INSURANCE COMPANY Know all men by these presents, that I, Robert G. Graham, a Member of the Board of Directors of Great-West Life & Annuity Insurance Company, a Colorado corporation, do hereby constitute and appoint each of D.C. Lennox and G.R. Derback as my true and lawful attorney and agent for me and in my name and on my behalf to, individually and without the concurrence of the other attorney and agent, sign my name, in my capacity as a Member of the Board of Directors of Great-West Life & Annuity Insurance Company, on Form 10-K Annual Reports of Great-West Life & Annuity Insurance Company to be filed with the Securities and Exchange Commission from time to time, and to any and all amendments thereto. IN WITNESS WHEREOF, I have hereunto set my hand this 26th day of March, 1997. /s/ R.G. Graham Member, Board of Directors of Great-West Life & Annuity Insurance Company Witness: /s/ Robin Graham Signature Robin Graham Name Printed