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Sublimation is an endothermic transition from the solid state to the gaseous without passing through the liquid phase so YES, it requires energy. Iodine is one example of a substance that will sublime at normal pressure and so are carbon & arsenic.

At a certain temperature and pressure, most substances have what is know as a "triple point". This is where the solid, gas and liquid all occur at the same temperature. It still requires energy to transform one into the other. In other words, if you have a solid, liquid and gas of some substance at the triple point and add energy, some of the solid will become liquid and some of the liquid will become gas but the temperature will remain the same.

Substances which sublime at normal pressures (iodine, carbon & arsenic) are at a pressure which is below their triple point. It still requires energy to move from one state to the other.

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