People

Alexandre Desroches Managing Associate

Parigi

Alexandre is involved in project financing and acquisition financing in the energy and infrastructure sectors. He advises sponsors (industrial and funds), financial institutions and governments.

He works on high-profile transactions in the French market, as well as on cross-border transactions. His area of expertise covers a wide range of financing operations (senior, junior, mezzanine, loans, and bond issues).

His experience includes public-private partnership financings, telecommunications, transportation, and renewable energy projects (in particular in the photovoltaic sector).

Before joining Orrick, Alexandre spent five years at a leading American law firm, where he developed significant expertise in financing.

Blake Dewveall Associate

Los Angeles

He advises lenders and corporate borrowers in a wide range of secured lending facilities and commercial financing transactions.

Blake was a summer associate in the firm's Los Angeles office in 2022.

Mariangela Di Giandomenico Partner

Roma

Esperta di diritto amministrativo e pubblico, nel corso della propria carriera ha prestato consulenza a imprese private e pubbliche, italiane e straniere, oltre che a corporations e pubbliche amministrazioni in materia di diritto pubblico e nel contenzioso, anche nel contesto di operazioni di M&A.

Mariangela ha maturato una vasta esperienza in tutte le aree del diritto amministrativo, in particolare nei settori contratti pubblici, urbanistica, real estate, comunicazioni, energia, aerospazio e difesa, life sciences, trasporti e infrastrutture, servizi regolamentati, nonché nel contenzioso dinanzi ai tribunali amministrativi, alla Corte costituzionale e alla Corte europea.

In qualità di avvocato cassazionista, è abilitata a rappresentare i propri clienti davanti alle Giurisdizioni superiori.

Nel 2025 è stata nominata dalla Commissione europea come membro dello Stakeholder Expert Group on Public Procurement (SEGPP)", che supporta la Commissione nella riforma delle direttive europee sugli appalti pubblici.

Grazie alla rilevante esperienza nel contenzioso davanti ai giudici amministrativi, Mariangela ha contribuito alla definizione delle politiche di diritto pubblico in Italia. Ha collaborato con la Camera dei Deputati e con il presidente della Commissione per la riforma amministrativa, supervisionando la stesura di disegni di legge, relazioni parlamentari e proposte normative.

Nel corso della propria carriera, ha lavorato in studi legali italiani e internazionali e in boutique specializzate in diritto amministrativo.  

Mariangela è membro del Comitato scientifico dell'Associazione Italiadecide e supervisiona l'Osservatorio sui contratti pubblici dell'Associazione. È docente in corsi di laurea magistrale in diritto amministrativo e in corsi per le istituzioni pubbliche. È inoltre autrice di numerose pubblicazioni in materia, relatrice in convegni e seminari pubblici e ricercatrice per associazioni private e pubbliche.

Nel 2021 Mariangela è stata inserita da TopLegal tra i migliori avvocati specializzati in appalti pubblici e concessioni. Nel 2022 è stata nominata avvocato dell'anno in materia di infrastrutture e PPP da Legalcommunity.

Alessandra Di Lorito Associate

Roma

Alessandra presta assistenza a clienti italiani e stranieri nel settore degli appalti pubblici, project financing e concessioni, infrastrutture, energia e ambiente, sia in ambito giudiziale che stragiudiziale.
È autrice di articoli in materia di diritto amministrativo pubblicati su riviste giuridiche di settore.

Prima di entrare in Orrick, ha maturato esperienza nel settore della contrattualistica pubblica presso un primario studio internazionale.

Laureatasi a pieni voti, Alessandra ha conseguito un master di II livello in Diritto Amministrativo (MIDA) presso la LUISS School of Law nel 2023.

Ha conseguito l'abilitazione all'esercizio della professione forense ed è iscritta all'Ordine degli Avvocati di Roma.

Marc Diab Maalouf Senior Associate

Parigi

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 Partner

Sacramento

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 Associate

Düsseldorf

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 Managing Associate

Milano

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.

Arden Dion Associate

Houston

Arden focuses her practice on mergers and acquisitions, project development and general corporate matters for clients primarily in the oil & gas, renewables and conventional power sectors.

Rebecca Dipple Professional Support Lawyer

Londra

Rebecca has acted for “Big Four” audit firms and global listed companies in a range of matters. These have included complex professional negligence litigation in the High Court, internal investigations and investigations by domestic and overseas regulators including the Financial Reporting Council, the Securities and Exchange Commission and the Public Company Accounting Oversight Board.

In addition to the above, Rebecca has also advised on UK and EU public procurement legislation including the application of the OJEU notification requirements to real estate developments.

Jonathan Direnfeld Partner

Washington, D.C.

Jon’s enforcement work involves helping clients navigate the patchwork of federal and state “consumer protection” rules and defending investigations and enforcement actions brought by the Federal Trade Commission (FTC), U.S. Department of Justice (DOJ), State Attorneys General (AGs), and other state regulatory agencies. These matters cover a broad spectrum of B2C and B2B issues, including data privacy, cybersecurity, greenwashing, and so-called “unfair and deceptive” sales and marketing practices with a focus on representation of e-commerce platforms, marketplaces, gig economy, social media and fintech companies. In connection with these enforcement matters, Jon is able to leverage his substantial experience in crisis management by helping clients devise and implement coordinated regulatory, legislative, and media responses to these high stakes incidents.

Jon also helps companies identify and understand regulatory risks and opportunities associated with ESG marketing and goals by providing guidance on greenwashing and the FTC’s Green Guides to help clients avoid deceptive marketing for environmental responsibility and sustainability.

Jon also has substantial experience in the antitrust and competition space, including class action antitrust litigation, criminal cartel investigations and enforcement actions before the DOJ and international regulators, as well as mergers and acquisitions and conduct investigations before the DOJ and FTC. In addition, Jon also provides strategic public policy counseling to clients on consumer protection and data management matters before Congress and executive branch agencies, and he has an active complex commercial litigation practice in federal and state courts across the country.

Stanley Dirks Senior Counsel

San Francisco

He represents issuers and underwriters of tax-exempt bonds to finance a variety of public facilities and programs, including water and power systems, airports, schools, rental housing loan programs and homeownership loan programs.

Stan has served as a lecturer and panelist on a variety of programs concerning state and local government debt issuance. He also served for ten years as one of the original members of the Technical Advisory Committee of the California Debt and Investment Advisory Commission.

Stan also has a long history of involvement in the governance of nonprofit education, arts and other charitable organizations.