Nucleic acid molecules and compositions comprising one or more nucleic acid sequences that encode a consensus Ebolavirus glycoproteinimmunogens are disclosed. The coding sequences optionally include operable linked coding sequence that encode a signal peptide. Immunomodulatory methods and methods of inducing an immune response against Ebolavirus are disclosed. Method of preventing Ebolavirus and methods of treating individuals infected with Ebolavirus are disclosed. Consensus Ebolavirus proteins are disclosed.