A multiple target tracker and beam steerer utilizes a micro-electro-mechanical system (MEMS) micro-mirror array to illuminate multiple tracked targets per frame one target at a time for designation, range finding or active imaging. The steering rate and range afforded by the MEMS micro-mirror array supports various tracker configurations (out-of-band, in-band or dual-band video cameras), LADAR detectors (single pixel or pixelated) and prioritization of tracked targets to vary the revisit rate or dwell time for an illuminated target. A user interface accepts commands from an operator to select the targeting mode, control cue-box size and position within the FOV and target selection. The MEMS micro-mirror array may be used to reflect beams and/or optical signals, in some embodiments.