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L.S. Wilfinger is a leading figure in robotics, whose work has fundamentally shaped how robots interact with their environments and handle complex mechanical systems. Wilfinger’s primary research areas are the kinematic analysis of constrained multibody systems and robust force control for robotic manipulation. Their most significant contribution is the extension of the kinematic manipulability concept—traditionally used for single robotic arms—to general constrained rigid multibody systems. This groundbreaking work, detailed in their 1999 paper (90 citations), provides a unified framework for analyzing the dexterity of systems like multiple cooperating manipulators, multi-fingered hands, and walking robots, offering crucial insights for design and control. In the realm of force control, Wilfinger’s 1994 paper on integral force control (48 citations) is a cornerstone, establishing the method as a preferred strategy for contact tasks. They further enhanced this work by introducing robustness modifications to reduce impact forces and maintain stable contact, a critical achievement for practical applications. With a career spanning foundational theory and practical control solutions, Wilfinger’s research remains essential reading for engineers and researchers working on advanced robotic manipulation and locomotion.