Modern medicine is in the process of entering the big data revolution, generating large volume multi-modal, multi-scale, and multi-omics data. This progress has opened-up new opportunities for computational scientists to discover previously undiscoverable statistical biomarkers from the data. The ideal end user for the developed computational tools will use them to ask important biological questions, but often does not have a background in computational science. This has further driven computational data science to ensure that the developed computational tools are accessible to any end-user. In this talk, we will shed light along this direction, and discuss an integrative tool, HAIL (Human AI Loop) in Cloud, for open data science. This tool is developed in conjunction with HistomicsUI, an open-source whole slide image viewer and digital data archival system. We have integrated our HAIL tool as an end-user plugin for conducting detection, segmentation, and quantification of structures from very large tissue images, as well as fusion of multi-modal data, particularly fusion of spatial molecular and image data. HAIL allows an end-user to actively interact with the system to tune the model training using their biological prior knowledge. We will also show results on how the tool can be used to conduct multi-site data analysis, eliminating the need to share data with protected health care information outside the host institution. We will conclude by discussing the need for generation of reference datasets, as well as the importance of integrating various types of data ontology with the system, for reproducible assessment of independent datasets.