A trusted advisor in a volatile world.
Austin Cahill
Austin Cahill is a leading authority in tax insurance and live controversy risk, with a track record of structuring innovative solutions for complex exposures.
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Austin Cahill is a leading authority in transactional risk insurance, including Tax Insurance, Litigation Insurance (including live controversies), and Contingent Risk Insurance, with a proven track record of structuring innovative solutions for highly complex exposures. Prior to founding Castle Harbour, he led and founded prominent tax insurance practices at Alliant Insurance Services and Atlantic Global Risk, advising top-tier private equity sponsors, multinational corporations, and law firms. His placements include over $1 billion in coverage on a single transaction, and his reputation for solving high-stakes, technically nuanced issues has made him the go-to advisor for clients seeking clarity and certainty in uncertain tax environments, including obtaining insurance solutions for high-profile cases at the U.S. Court of Appeals and the European Court of Justice. An NYU LL.M. graduate and former Big Four advisor, Austin is regularly cited in Bloomberg Tax, Tax Notes, and Risk & Insurance for his insights on the evolving transactional risk insurance market.
Austin Cahill
Managing Partner
Tax Insurance, Litigation Insurance, Contingent Risk
Austin.Cahill@castleharbour.com
(862) 396-0974
David Cohen
David Cohen is an accomplished M&A attorney with extensive experience that spans private practice, in-house, and insurance.
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David Cohen is an accomplished M&A attorney with extensive experience that spans private practice, in-house, and insurance. He began his career at Wachtell, Lipton, Rosen & Katz advising on high-profile private equity and public M&A transactions, and later joined Amazon’s in-house M&A legal team, where he played a key role in executing Amazon’s $13.7 billion acquisition of Whole Foods Market. He then transitioned into the transactional risk insurance space, first as an underwriter at a leading MGA and later co-leading the RWI practice at a top brokerage. Earlier in his career, David served as a law clerk for then-Chancellor Leo E. Strine, Jr. on the Delaware Court of Chancery and earned his J.D. magna cum laude from the University of Pennsylvania Law School.
David Cohen
Managing Partner
Representations & Warranties Insurance, Warranties & Indemnities Insurance, Complex M&A
Penny Mavridis Sales
Penny Mavridis Sales is a seasoned international tax expert with three decades at the forefront of cross-border transactions.
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Penny Mavridis Sales is a seasoned international tax expert with three decades at the forefront of cross-border transactions. At KPMG, she was Senior Lead Tax Principal, heading New York’s TMT tax group and earlier leading the firm’s Eastern Regional International Tax practice, advising multinationals on landmark deals. Her leadership spans technology, media, telecommunications, and industrial sectors. She previously served as VP of International Tax at Time Warner, shaping global structuring strategies, and was a principal at PwC and a tax associate at Davies Ward Philips & Vineberg (previously Goodman, Philips & Vineberg), an international law firm. Penny holds a J.D. from Boston University and an LL.M. in Taxation from NYU, bringing in-house, law firm, and Big Four perspectives to Castle Harbour’s clients.
Penny Mavridis Sales
Managing Partner
Tax Insurance, International M&A, Media & Technology
Jeff Lash
Jeff Lash is a recognized expert in tax insurance, known for underwriting some of the largest and most complex risks at the cutting edge of the market.
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Jeff Lash is widely recognized as an expert in tax insurance, known for underwriting some of the largest and most complex risks at the cutting edge of the market. Before joining Castle Harbour, he was Senior Vice President and Tax Underwriter at Euclid Transactional, where he played a pivotal role in shaping and expanding market standards for underwriting, particularly in the areas of transfer pricing and valuation. Earlier in his career, Jeff advised Fortune 500 clients on high-stakes domestic and international tax planning as a tax attorney at Covington & Burling. Jeff holds a J.D. from Stanford Law School, as well as advanced degrees in Economics and Mathematical Economic Analysis from Rice University.
Jeff Lash
Managing Partner
Tax Insurance, Complex Transactions, Contingent Risk Insurance
Ryan Davis
Ryan Davis is a cross-border tax insurance specialist with twenty years’ experience counselling private-equity sponsors and asset managers on complex M&A.
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Ryan Davis is a cross-border tax insurance specialist with twenty years’ experience counselling private-equity sponsors and asset managers on complex M&A. Before joining Castle Harbour, he was a principal in KPMG New York’s Asset Management–International Tax group and spent a decade in KPMG London guiding global investment funds through structuring, diligence and exit strategies. He has advised on more than 1,000 transactions across Europe, Latin America, Asia and the United States, giving clients practical, market-driven insight into fund formations, acquisitions and disposals. Ryan holds a J.D. from Santa Clara University and an NYU LL.M. in Taxation. He is also a Chartered Financial Analyst ("CFA").
Ryan Davis
Partner
Tax Insurance, Alternative Investment, Cross-Border Planning
David Tawil
David Tawil melds restructuring law, leveraged finance, and event-driven investing expertise into a single advisory lens.
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David Tawil melds restructuring law, leveraged finance, and event-driven investing expertise into a single advisory lens. He started his career handling high-profile bankruptcies at Davis Polk and Skadden, then became Director of Leveraged Finance at Credit Suisse, structuring capital solutions for corporate and sponsor-backed deals. As president of Maglan Capital, he directed turnaround and distressed-credit investments, pairing legal insight with activist strategy. This multifaceted background equips him to assess transactional risk in stressed or complex scenarios. A University of Michigan Law School J.D., David is a commentator in outlets such as The Wall Street Journal, Financial Times, Bloomberg, and CNBC.
David Tawil
Partner
Alternative Finance, Litigation Insurance, Contingent Risk