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Effective conservation requires an understanding of how species respond to management actions.� For species of conservation concern such as greater sage-grouse (Centrocercus urophasianus), this understanding is urgently needed.� We developed resource selection functions to assess the influence of mechanical treatments of mountain big sagebrush (Artemisia tridentata vaseyana) on habitat selection by greater sage-grouse during the critical brooding period.� We used model selection and a 19-year telemetry data set (1998-2016) to evaluate response of greater sage-grouse to treatments.� Statistical models were built using 418 locations from 72 females with broods (333 locations, 61 females pre-treatment; 85 locations, 11 females post-treatment).� Shrub canopy cover decreased (mean � SE) from 31.81 � 0.70% to 16.16 � 0.89% following mechanical treatment (P�< 0.05).� Grass cover increased from 12.02 � 0.51% to 31.33 � 1.52% after treatment (P�< 0.05).� Post-treatment forb cover (12.58 � 1.23%) did not differ from pre-treatment estimates (12.39 � 0.61%;�P�= 0.98).� Overall, greater sage-grouse selected areas that were 1) farther from trees, paved roads, and powerlines, 2) higher in elevation, 3) nearer treatment edges, and 4) consisting of gentler slopes.� Post-treatment sage-grouse showed stronger selection for areas near treatments than did pre-treatment sage-grouse.� Maps predicting probability of selection by brood-rearing sage-grouse showed increased use in and around mechanically-treated areas.� This altered pattern of selection by sage-grouse with broods suggests mechanical treatments may be a suitable way to increase use of mountain big sagebrush during the brooding period.