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Gregory Long is a pioneering researcher in the field of robotics, with a primary focus on the kinematics, singularity analysis, and control of parallel and serial robot manipulators for teleoperation. His most influential work centers on force-reflected hand controllers, where he has made foundational contributions to the design and analysis of in-parallel devices. Long’s landmark 1995 paper, “The singularity analysis of an in-parallel hand controller for force-reflected teleoperation,” has garnered 89 citations, establishing a critical framework for understanding the kinematic limitations of Stewart-platform-type devices. He further advanced the field with his 2003 work on a pantograph linkage parallel platform master hand controller (52 citations), which extended the workspace of traditional platform designs and provided essential equations for remote manipulator control. Long has also contributed to the theoretical foundations of robotics through his exploration of twist/wrench duality in serial and parallel chains, leveraging screw theory to unify concepts across different manipulator types. His research on the cylindroid for singularity analysis of rank 3 manipulators and singularity avoidance strategies has provided practical tools for improving robot dexterity and safety. With a career spanning from the late 1980s to the early 2000s, Long’s work remains essential reading for researchers in teleoperation, haptics, and parallel robotics.