Mr. Lathrop is a member of the following legal organizations:
- American Board of Trial Advocates
- Association of Professional Responsibility Lawyers
- American Bar Association
- San Diego County Bar Association
- New York City Bar Association
- District of Columbia Bar
- International Bar Association
- International Council for Commercial Arbitration
- Judge Advocates Association
- American Board of Neutrals Association
- International Association of Defense Counsel
- Federal Bar Association
- Association of Business Trial Lawyers
- Association of Professional Responsibility Lawyers
- Federal Bar Council
- New York Academy of Sciences
- Center for International Legal Studies
- International Institute for Conflict Prevention and Resolution (CPR)
- London Court of International Arbitration
- The Institute for Transnational Arbitration
- Japan Commercial Arbitration Association
- Association Internationale de Droit des Assurances (AIDA)
- AIDA Reinsurance and Insurance Arbitration Society (ARIAS-US)
- Association Suisse de l’Arbitrage
- Association of Insurance and Reinsurance Run-Off Companies (AIRROC)