People

Mariangela Di Giandomenico 合伙人

罗马

As expert in Italian Administrative and Public Law, she has focused her career on advising private and public Italian and foreign companies, corporations and public administrations on public law regulatory and litigation matters, providing particular assistance in M&A transactions.

Mariangela has extensive experience working in all the areas of administrative law, especially in public contracts, urban planning and real estate, electronic communications, energy, aerospace and defense, life sciences, transportation and infrastructure, regulated services and also in litigation before Administrative Judge, Constitutional and European Court.

In 2025, she was appointed by the European Commission as member of the Stakeholder Expert Group on Public Procurement (SEGPP),” which supports the Commission in the reform of EU public procurement directives.

With an extensive background litigating before administrative law judges, Mariangela is a recognized leader in shaping public law policy in Italy. She has collaborated with the Italian Chamber of Deputies, the president of the Commission for Administrative Reform, overseeing the drafting of bills, parliamentary reports and regulatory proposals.

During her career, she has worked in both international and Italian law firms, as well as in boutiques specialized in administrative law.

She is a member of the Scientific Committee of the Italiadecide Association and oversee the Observatory on Public Contracts of the Association. She teaches at Master’s degree courses in administrative law as well as courses in public institutions

She is also an author of numerous publications in the field, rapporteur at conferences and public seminars and a researcher for private and public associations.

She is authorized to practice in the higher courts.

In 2021 Mariangela has been included by Top Legal among the best lawyers specialized in public procurement and concessions. In 2022 she was named infrastructure and PPP lawyer of the year by Legalcommunity.

Alessandra Di Lorito 律师

罗马

Alessandra's activity focuses on advising Italian and foreign clients in the areas of public procurement, project financing and concessions, infrastructure, energy and environment, both in and out of court.

She is the author of articles on administrative law published in legal journals of the sector.

Prior to joining Orrick, she gained experience in the same practice, working for a leading international firm.

Alessandra graduated with honors with a master's degree in law. She has also earned a LL.M. in Administrative Law (MIDA) from LUISS School of Law in 2023.

She is qualified as a lawyer in 2023 and has been a member of the Rome Bar Association since 2024.

Marc Diab Maalouf 高级律师

巴黎

Marc advises investment funds, industrial groups, listed companies, and startups, both French and international, on all aspects of business law, particularly in the context of acquisitions, disposals, mergers, reorganizations, and strategic partnerships. 

He is particularly active in the infrastructure, renewable energy, and new technology sectors, both in France and internationally.

In 2025, the international guide Legal 500 EMEA named him in the Key Lawyer category in Private equity: LBO and commented "high-quality deliverables; clear, didactic communication; strong proposals; proactive" and "serious while being relaxed in interactions, appreciable in the execution phase under pressure".

Brandon Dias 合伙人

沙加缅度

California Local Government Finance. Brandon focuses on California local government financing structures including general fund lease revenue bonds and certificates of participation; pension obligation bonds; tax and revenue anticipation notes; mello-roos bonds, assessment district bonds and other land secured financing structures; redevelopment financing; water and wastewater revenue bonds; airport revenue bonds; and public power revenue bonds.

Tax-Exempt Healthcare Finance. Brandon also focuses on tax-exempt healthcare finance for 501(c)(3) organizations. His experience includes financings for standalone hospitals, hospital systems and continuing care retirement communities. He has served as bond counsel or underwriters' counsel on tax-exempt healthcare financings in various states throughout the nation.

Leon Diederichs 律师

杜塞尔多夫

He focuses in particular on disputes in antitrust law. His work includes representing a client from the petrochemical industry in the enforcement of antitrust claims for damages against companies involved in cartels.

Already as a trainee lawyer at Orrick, he contributed to the successful action for annulment of an investment control prohibition decision before the Berlin Administrative Court.

Before becoming a lawyer, Leon Diederichs completed a stage at the German Federal Cartel Office and worked for several international law firms including Orrick.

Roberta Dimaggio 主理律师

米兰

She focuses her practice on private equity transactions and corporate matters, advising clients on national and cross-border mergers and acquisitions, corporate governance, and commercial law issues.

Roberta's expertise extends to assisting both Italian and international companies on M&A transactions for domestic and international growth as well as private equity funds on their investments. She also provides counsel to Italian families in strategic operations involving private equity funds and transactions aimed at expanding their businesses. In addition to her transactional work, Roberta offers general corporate expertise, guiding clients through various corporate governance and commercial law matters.

Roberta has advised on acquisitions in the healthcare sector, including the purchase of medical centers and diagnostic facilities, as well as transactions in the industrial sector. Her experience includes assisting clients in the acquisition of companies specializing in energy efficiency and decarbonization solutions, as well as advising on the sale and purchase of manufacturing and industrial assets.