Daniel J. Siegel. Office of Disciplinary Counsel v. Wrona Daniel J. Siegel , principal of the Law Offices of Daniel J. Siegel, provides ethical guidance and Disciplinary Board representation for attorneys and law firms; he is the editor of "Fee Agreements in Pennsylvania" (6th Edition) and author of "Leaving a Law Practice: Practical and Ethical Issues for Lawyers and Law Firms" (Second Edition), published by the Pennsylvania Bar Institute . Contact him at [email protected].