A system for additively manufacturing a three-dimensional object, the system comprising: an irradiation device configured to emit an energy beam having a manufacturing power level selected to additively manufacturing a three-dimensional object by irradiating a powder material, the irradiation device comprising a beam source, one or more beam positioning elements disposed downstream from the beam source, a beam splitter disposed downstream from the one or more beam positioning elements, the beam splitter configured to split a measurement beam from the energy beam, and one or more beam sensors configured to determine one or more parameters of the measurement beam, the measurement beam propagating along a measurement path to the one or more beam sensors, and the energy beam propagating along an irradiation path to the powder material; and a controller configured to perform one or more beam alignment operations when irradiating the powder material with the energy beam to additively manufacture the three-dimensional object, the one or more beam alignment operations determined based at least in part on the one or more parameters of the measurement beam; wherein the one or more beam alignment operations comprises: determining with the one or more beam sensors, position information of the energy beam based at least in part on the one or more parameters of the measurement beam; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors. an irradiation device configured to emit an energy beam having a manufacturing power level selected to additively manufacturing a three-dimensional object by irradiating a powder material, the irradiation device comprising a beam source, one or more beam positioning elements disposed downstream from the beam source, a beam splitter disposed downstream from the one or more beam positioning elements, the beam splitter configured to split a measurement beam from the energy beam, and one or more beam sensors configured to determine one or more parameters of the measurement beam, the measurement beam propagating along a measurement path to the one or more beam sensors, and the energy beam propagating along an irradiation path to the powder material; and a controller configured to perform one or more beam alignment operations when irradiating the powder material with the energy beam to additively manufacture the three-dimensional object, the one or more beam alignment operations determined based at least in part on the one or more parameters of the measurement beam; wherein the one or more beam alignment operations comprises: determining with the one or more beam sensors, position information of the energy beam based at least in part on the one or more parameters of the measurement beam; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors. determining with the one or more beam sensors, position information of the energy beam based at least in part on the one or more parameters of the measurement beam; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors.