To thrive as a professional at Ancestry.com, you should possess strong research skills, attention to detail, and a background in genealogy, history, or data analysis. Familiarity with genealogy databases, records management software, and tools like AncestryDNA or Family Tree Maker is highly beneficial. Excellent communication, customer service skills, and patience are important for assisting users in uncovering their family histories. These competencies help provide accurate, insightful genealogical information and support, enhancing the customer experience.