Darl Kuhn is a senior-level database administrator with decades of experience. He handles all facets of database administration from design and development to production support. He enjoys documenting and sharing knowledge and has authored several books on Oracle technology. 

Thomas Kyte is a former vice president of the Core Technologies Group at Oracle Corporation. He is the same Tom who created the "Ask Tom" website and the Oracle Magazine column of the same name. He has a long history of answering questions about the Oracle database and tools that developers and database administrators struggle with every day.