National Security and Bioenergy Investment Act of 2005

National Security and Bioenergy Investment Act of 2005 - Amends the Biomass Research and Development Act of 2000 to redefine "biomass."

Revises provisions respecting: (1) Biomass Research and Development Technical Advisory Committee membership; (2) the Biomass Research and Development Initiative; (3) reports; and (4) funding.

Eliminates the termination date for authority under such Act.

Directs the Secretary of Agriculture to: (1) conduct a research, development, and demonstration program on the economic production and use of hydrogen from biofuels, with emphasis on the rural transportation and rural electrical generation sectors; (2) establish an incentive program for the production of cellulosic biofuels; and (3) make small business bioproduct marketing and certification grants; (4) make regional bioeconomy development grants; (5) make preprocessing and harvesting demonstration grants; and (6) contract for a biobased fuels and products education program.

Directs the Secretary to establish a position of Assistant Secretary of Agriculture for Energy and Biobased Products, who shall be responsible for: (1) energy programs under title IX of the Farm Security and Rural Investment Act of 2002; and (2) all other programs and initiatives that the Secretary considers appropriate.

Amends the Farm Security and Rural Investment Act of 2002 respecting federal biobased product procurement.

Directs the Architect of the Capitol to establish in the Capitol Complex a public education program regarding biobased product use by the Architect.

Expresses the sense of the Senate that Congress should amend the tax code to encourage investment in, and production and use of, biobased fuels and biobased products through investment tax credits for small manufacturers and facilities construction.