Provided are Shp2- and Spleen tyrosine kinase (Syk)-integrated sensing and actuating protein (iSNAP) (Shp2- and Syk-iSNAP) chimeric proteins comprising: a bi-phosphorylatable peptide, optionally a bisphosphoryl tyrosine-based activation (BTAM) motif; a Fluorescent Protein (FP) Förster Resonance Energy Transfer (FRET) (or FP FRET) pair or pair of motifs; a truncated Shp2 domain comprising an N-Src Homology 2(N-SH2) domain and a C-Src Homology 2(C-SH2) domain; and, a phosphatase (PTP) domain or a kinase domain. Provided are engineered cells and methods for cancer cell or tumor eradication, or for the treatment or amelioration of a cancer, tumor or dysfunctional cell, or for promoting an anti-cancer, anti-tumor or anti-dysfunctional cell inflammatory response, including enhancing macrophage-, monocyte-, microglia-, osteoclast-, Kupffer cell- or dendritic cell-mediated antibody- or monoclonal antibody (mAb)-guided cancer or dysfunctional cell or tumor eradication, amelioration, or treatment.