Mosaic’s M&A Team can help differentiate acquisition proposals in competitive auction processes, providing comfort and certainty and bridging the gap between buyers and sellers.

Our specialists have deep experience evaluating and underwriting all types of M&A transactions across industries in North America and internationally. “Partnership with a Purpose” is the core of our mission. By combining our own capacity through our Lloyd’s Syndicate 1609 with the syndicated capital of industry partners, Mosaic brings meaningful risk-transfer solutions to parties engaging in M&A transactions or seeking to insure specific tax issues.




Bill oversees underwriting operations in North America, the UK, Europe, and Asia-Pacific regions. With more than 20 years of experience as a leader in the transactional risk insurance sector as an underwriter, broker and lawyer, his focus includes representations & warranties, tax insurance, and contingent liability insurance products. From 2011, Bill led the Mergers & Acquisitions Group in North America for Willis Towers Watson, growing the brokerage practice to become a leader in the market. Previously, he headed managing general agents M&A Risk Solutions and Transaction Risk Solutions for over a decade.
+1 312 662 8007

Robert underwrites a variety of complex transactional liability risks for Mosaic. Previously, he was a forensic accountant at KPMG for 11 years, responsible for transactional-related disputes, including breaches of representation and warranty claims, net working capital and earnout disputes, and other insurance issues. He is a Certified Public Accountant, Certified in Financial Forensics, and Certified Fraud Examiner.
+1 908 309 8309

Greg supports Mosaic’s transactional liability team on tax matters in jurisdictions outside North America.A solicitor, he has nearly a decade of specific tax experience, with a focus on tax aspects of M&A transactions and employment tax. He previously was a senior underwriter at Icen Risk. Before joining the transactional liability insurance market, Greg worked in tax teams of international law firms, including Norton Rose Fulbright LLP, Proskauer Rose LLP, and Simmons & Simmons.
+44 (0)7379 089 489

Edwin works with our Singapore team to  build Mosaic’s transactional liability practice in Asia-Pacific, after a decade broking and underwriting M&A transactions. He previously was an underwriter for AIG in the region, including leading the primary underwrite on cross-border and multi-billion-dollar M&A transactions. Prior, he was a director on Aon’s transaction liability team, advising and placing warranty and indemnity (W&I) policies.
+65 8222 4254

Keith develops M&A business for Mosaic across Europe, the Middle East, and Africa, with a focus on the UK. A solicitor, he trained at a global construction, real estate, and minerals company, with a focus on corporate, commercial and real-estate law. He previously worked in the W&I/RWI market at CFC Underwriting and Aviva, and has experience in both European and US domestic transactional insurance deals.
+ 44 (0)7572 446 523

Chris supports Mosaic’s international transactional liability team. He completed his LLB at Durham University and LPC at BPP Law School before undertaking a Master’s in International Finance Law at King’s College, London, where his focus was on private-equity finance and transaction funding. Chris worked previously as an ISDA negotiator for Deloitte and was placed at a top US investment bank. He later joined the market as an associate underwriter in the transactional liability team at Berkshire Hathaway Specialty Insurance.
+44 (0)7425 565 510

Stavan guides Mosaic’s underwriting team in North America. Previously, he was a senior underwriter for AIG, with a focus on transitional risk insurance for complex M&A and secondary transactions. Prior, he served as a senior attorney at Schulte Roth & Zabel, where he concentrated his domestic and cross-border practice on private equity, M&A, leveraged buyouts, and alternative asset management transactions.
+1 610 213 6600

Ze’ev assesses and writes a a broad array of tax risks, advising Mosaic’s transactional liability team. Previously, he spent six years as a tax lawyer at Fried, Frank, Harris, Shriver & Jacobson LLP, where he focused on fund formation, opportunity zones, cross-border inversions, and other complex tax issues.
+1 201 694 3405

Yen is a member of Mosaic’s Asia-Pacific M&A team, with a focus on developing transaction liability solutions. She has close to a decade of legal and insurance experience in the region and was previously a director in Aon’s transactions solutions division, leading its Singapore team in advising and placement for international clients. Prior, she worked in international law firms, overseeing cross-border M&A transactions.
+65 8120 8262

Will leads Mosaic’s tax-liability underwriting outside North America, from both a specific risk and a transactional risk support perspective. He has 18 years of professional experience, focused primarily on cross-border, transactional,and structural tax matters. Until 2020, he held senior advisory roles at several international law firms, advising high-profile corporate, financial services and investment fund clients on a full spectrum of complex tax issues. More recently, Will spent more than two years in a leading role on an insurance tax liability team, focussed on European tax and contingent risks.
+44 (0)7909 066 407

Griffin graduated from Binghamton University, New York, with a Bachelor of Science in Finance in May 2021. Previously, he interned as a commercial real-estate intern at Savills in 2018 and ’19.

Fran is a member of our international transactional liability team, advising on complex and multi-jurisdictional transactions across Europe, including Central and Eastern Europe and Southeast Europe. With a decade of experience, she brings a wealth of deal, multi-sector, and jurisdictional-specific expertise to our underwriting. Prior to insurance, she practiced as a regional transactional specialist (advocate) with international law firm CMS in Prague, Czech Republic, regularly advising insurers on M&A transactions across a number of regions.
+44 (0)7522 885 266

Andrew is a member of Mosaic’s M&A unit in London, concentrating on development of the company’s transactional liability business outside North America. With over a decade of experience advising on and underwriting M&A transactions, he previously was a senior underwriter at AIG focused on providing insurance for M&A deals across the UK, Europe and emerging markets. Prior to that, he spent 10 years at city law firm Travers Smith, where he trained and qualified as a solicitor before progressing to senior counsel in the corporate M&A team.
+44 (0)7498 790 135

Brian supports Mosaic’s transactional liability business growth in North America, specializing in complex M&A risks. He worked previously as an associate in the New York office of law firm Weil, Gotshal & Manges LLP, where he represented private-equity sponsors in a variety of domestic and cross-border M&A transactions. A graduate of Cornell Law School, NY, he also holds an LLM from Université Paris 1 Panthéon Sorbonne and a Master’s degree from St. John’s College, MD.
+ 1 212 508 9723

Barbie underwrites complex domestic and international mergers and acquisitions risks as a member of Mosaic’s North American transactional liability team. Previously, she was a senior corporate counsel for global job site, where she advised on M&A and venture capital investments. Before that, she was vice president at Berkley Transactional for more than four years, where she negotiated and marketed representations and warranties insurance policies. She has also worked as an M&A attorney at Winston & Strawn in New York and a corporate attorney at Foley Hoag in Boston.
+1 212 508 9731

Jon advises Mosaic’s transactional liability team, overseeing underwriting decisions on tax risks arising in North America, the UK, Europe, and the Asia-Pacific region. He has 14 years of experience as a tax lawyer, most recently as a partner in Dentons US, based in New York City and Washington, DC. His work has focused on cross-border transactions and structures, including mergers and acquisitions, restructuring and expansions, counseling issuers on the treatment of various financial instruments, as well as advising insurance underwriters on tax risks in connection with specialty policies.
+1 917 698 3387

Rocky assists Mosaic’s transactional liability team with underwriting decisions on tax risks. He has six years of experience as a tax attorney at KPMG, New York, where his practice focused on cross-border transactions, including mergers and acquisitions, restructuring, and efficient tax structures for private equity funds.

Yuqi has a Finance degree from Baruch College, New York. She’s now pursuing a Master’s in Data Analytics at Baruch, and expects to graduate in June 2022. She also sat CFA Level 1 this fall. Previously, she worked for a tax and accounting firm as a staff accountant, preparing and examining financial statements.

Ignacio completed his Master in Corporate Finance degree at Bayes Business School, University of London, where most of his research involved analysing cross-border and cross-industry M&A transactions. Before joining Mosaic, he was a graduate manager at Amazon, working in a logistics division launching a delivery station as a member of a senior leadership team. He also completed internships with Deloitte and a Swiss wealth-management firm.
+44 (0)7903 247 292

Matteo is helping to build Mosaic’s M&A business in North America, specifically focusing on underwriting, as well as developing the company’s operational infrastructure and team of analysts. Previously, he was a senior analyst at AIG in its M&A insurance group. Before that, he also completed post-grad internships in the P&C and specialty resinsurance spheres.
+1 646 283 8979

Ciaran is a member Mosaic’s international transactional liability team and develops business across Europe, the Middle East and Africa, with a focus on the UK. Previously, he worked at AIG for more than three years as an underwriter on M&A deals across UK, Europe, and emerging markets. He also had a brief secondment to the AIG cyber team. Prior to that, he spent two years at Chubb in its international transactional liability team.
+44 (0)7442 110 606

Casey is a member of Mosaic’s US M&A deal team, analysing operational and economic facets of legal agreements. He previously practiced corporate law as an associate attorney at Golenbock Eiseman Assor Bell & Peskoe in New York, and Chipman Mazzucco Emerson in Danbury, CT. At both firms, he represented clients in purchase or sale of businesses throughout all stages of transactions.

Sami is a member of Mosaic’s international transactional liability team, advising on multi-jurisdictional transactions outside North America. With a decade of experience advising on M&A deals, he previously worked in the corporate law teams of Travers Smith in London and Hogan Lovells in Dubai, before serving as associate general counsel at WorldRemit, leading a team on corporate and commercial transactions.
+44 (0)7442 116 321

Melissa supports the build-out of cyber, financial institutions, and transactional liability lines, with a focus on opportunities distributed through the Bermuda market. She previously worked at Liberty Specialty Markets Bermuda as an underwriter on the financial lines and special risk teams, and has experience writing the full suite of FI and TL products.
+1 441 717 8228

Matthew graduated from Oxford Brookes University, UK, in 2022 with a BSc in Economics, Finance, and International Business. At university, he was involved in his academic community, leading a society that organized talks and seminars to connect students with entrepreneurs. He also interned for a boutique accounting and consulting practice in Turin, Italy, where he worked on acquisitions of Italian SMEs.
+44 (0)7442 114 975

Eileen underwrites complex and multi-faceted M&A risks to develop Mosaic’s transactional liability business in the DACH (Germany, Austria, Switzerland) region. She previously underwrote warranty and indemnity insurance for the M&A group at RiskPoint. Prior to that, she served as a corporate associate at international law firms Freshfields Bruckhaus Deringer and Latham & Watkins in Frankfurt, specialising in advising private equity and public and strategic clients on domestic and cross-border M&A transactions, investments, joint ventures, co-investments and management incentives.
+49 (0)173 6651 764

Katherine plays an integral role in leading innovative and consistent underwriting execution across the M&A insurance portfolio at Mosaic. She previously served as a senior transactional risk insurance underwriter at Everest Insurance. Katherine also brings nearly a decade of experience representing public and private-equity clients in a wide range of complex domestic and cross-border M&A transactions at White & Case and Torys.
+1 212 508 9714

Sam manages Mosaic’s transactional liability underwriting team outside of the Americas. He has advised on or underwritten in excess of 500 transactions globally across EMEA and APAC, and previously was head of London and emerging markets at Liberty GTS. Prior to insurance, he practiced as a corporate M&A solicitor in London at Nabarro LLP (now CMS), where he advised clients on private and public M&A transactions across multiple sectors.
+44 (0)7498 790 133

Spencer is focused on building Mosaic’s M&A business outside North America. He joins from re/insurer Ambridge, where he spent four years and was responsible for underwriting international transactions, specialising in complex, multi-jurisdictional deals. He is a chartered accountant, and practiced at PwC for five years, providing financial and risk assurance services to FTSE 100 companies, before joining the insurance industry.
+44 (0)7534 517 232

Benn heads up Mosaic’s Asia office and leads the company’s transactional liability business in the Asia-Pacific region. He has lived and worked for more than 15 years in Asia, specializing in the M&A insurance sector. Before joining the industry in 2015, he was a corporate and private M&A solicitor for Ashurst LLP and in-house counsel for telecoms company Ooredoo.
+65 9752 2412

Justin analyzes and evaluates risks associated with M&A deals for Mosaic’s transactional liability team. Previously, he was a reinsurance broker intern at Aon, where he examined investment opportunities and streamlining processes. Justin holds a BBA in Finance and a minor in Economics from Binghamton University, New York, and has completed his IASSC Certified Lean Six Sigma Green Belt (ICGB) certification, a course teaching proficiency in data-driven problem-solving skills.

Vivian supports Mosaic’s transactional liability team in North America, focusing on developing underwriting skills and leading operational workflow and metric delivery to key stakeholders. She completed both her BBA in Finance and MS in Business Analytics at Baruch Zicklin School of Business, New York. Previously, Vivian interned at an investment bank, specializing in raising capital for startups. She is also a certified Tableau Desktop Specialist and has passed the Certified Financial Analyst (CFA) Level I exam.
+1 917 518 8857

Camille advises Mosaic’s transactional liability team on complex tax risks outside North America. She previously worked as a tax underwriter at Acquinex. Prior to joining the tax-insurance industry, she was a tax lawyer at Taj-Deloitte in Paris, specializing in advising investment funds, insurance companies, and banks on tax-related aspects of domestic and cross-border transactions.
+44 (0)7796 649 520

Charlie focuses on complex Canadian and international M&A transaction risks for Mosaic. Previously, he worked as a corporate associate at Osler, Hoskin & Harcourt LLP, representing clients in a broad range of corporate matters, including M&A and private equity transactions. He holds a Juris Doctor from Osgoode Hall Law School at York University and a Master of Business Administration from the Rotman School of Management at the University of Toronto.
+1 416 859 3358

Transactional Liability Claims

Pro-active claims management by specialists is at the heart of every risk we cover. Fair handling of claims, and quick payment where agreed, is our promise.
+44 1494 766 978