People

Daniel A. Rubens Partner

New York

Danny's practice focuses on appellate litigation. He has led the drafting on dozens of appellate briefs, and regularly argues appeals in state and federal courts. Danny has extensive trial litigation experience as well, with an emphasis on dispositive motions, preserving appellate issues, and developing creative legal strategies.

Danny’s work has covered a wide range of subject areas, including securities, bankruptcy, intellectual property, arbitration, class actions, and criminal law. He has a deep understanding of appeals and critical motions in financial services litigation, and in recent years has played a key role in representing financial institutions in major RMBS cases brought by trustees, investors, and monoline insurers. His financial services clients include Credit Suisse, Goldman Sachs, Mr. Cooper, and Ocwen. He also represents leading technology companies in precedent-setting cases involving antitrust law and ballot initiatives, as well as other complex commercial litigation.  In addition, Danny is an experienced bankruptcy litigator, having represented various debtors and creditors in fraudulent transfer cases and other contested insolvency-related matters involving U.S. and foreign law.

Danny is a member of the Second Circuit's pro bono panel and maintains an active pro bono practice focusing on criminal, immigration, racial justice, and LGBTQ+ rights matters in the Supreme Court and other appellate courts. He was recently recognized by the National LGBTQ+ Bar Association as a “Best LGBTQ+ Lawyer Under 40,” by the New York Law Journal as a Rising Star, and by LawDragon in its inaugural 500 X – The Next Generation listing.  As part of his commitment to diversity, equity, and inclusion, Danny serves as a mentor for The Appellate Project, an organization focused on empowering law students of color to thrive in the appellate field. He has also served as an Orrick ambassador for the Move The Needle Fund, a collaborative effort designed by Diversity Lab to create a more diverse and inclusive legal profession.

Before joining Orrick, Danny served as a law clerk to U.S. Supreme Court Justice Ruth Bader Ginsburg, Judge Robert A. Katzmann of the U.S. Court of Appeals for the Second Circuit, and Judge Jed S. Rakoff of the U.S. District Court for the Southern District of New York. Following his clerkships, he was selected to represent the American Inns of Court as a Temple Bar Scholar in London.

Dr. Johannes Rüberg, EMBA Partner

Monaco

This includes venture and growth financings in all stages and general corporate counseling. His practice further focuses on advising strategic and financial investors on mergers and acquisitions.

Germany's leading legal directory JUVE lists Johannes as frequently recommended for both corporate law and venture capital, including a competitor's testimonial "very good expertise, pleasant cooperation" (2024/2025). Legal 500 Deutschland lists Johannes as a "recommended lawyer" for venture capital (2024), including the testimonials "very supportive and a pleasure to work with", "extremely conscientious", and "quick response time" in its 2022 edition. Since 2021, he has been recognized by Germany's leading business daily Handelsblatt as a "Ones to Watch" lawyer for corporate law.

In addition to his work as a lawyer, Johannes has completed the joint Executive MBA program by U.S.-based Kellogg University and WHU – Otto Beisheim School of Management, Germany’s leading startup university.

Aaron M. Rubin Partner

Orange County

An accomplished litigator, Aaron advises leading investment banks, financial institutions, mortgage servicers, non-bank lenders, and alternative asset managers on the unique issues impacting the finance sector, from major commercial disputes to securities litigation and enforcement actions. Leveraging his dispute resolution expereince, Aaron serves as a trusted partner to clients, advising on best practices for mitigating risk long before there is the threat of litigation.

In 2018, Aaron moved to the firm’s Orange County office from New York. The move served his New York-based traditional financial institution clients needing counsel on the West Coast, while also expanding his practice.

David M. Ruff Partner

New York

David advises private equity funds, their portfolio companies and a broad range of public and private technology, energy and life sciences companies in domestic and cross-border M&A, minority and majority investments, joint ventures and other complex transactions.

Paul F. Rugani Partner

Orange County; New York; Seattle

Legal 500 touts Paul as a recommended attorney for Securities Litigation, observing that he is “among the most creative and strategic lawyers” who always has “an eye on the end game.”  Paul achieved American Lawyer Litigator of the Week recognition as part of a team that achieved a ground-breaking New York Court of Appeals victory that substantially reduced financial exposure in RMBS repurchase litigation.

Leader of Orrick's Securities Litigation practice and deputy leader of the Firm's Financial Services Litigation practice, Paul has extensive experience representing clients in securities class actions, shareholder derivative lawsuits, commercial contractual disputes and other complex litigation matters at both the trial and appellate levels, as well as in connection with internal, government and regulatory investigations. Paul also counsels domestic and foreign accounting firms on matters related to state CPA licensing and state board regulation.

Michael Ruiz Partner

Silicon Valley; Seattle

Michael advises his clients on a broad range of legal needs, including corporate formation and structure, venture capital financings, board and stockholder relationships and exit transactions. His current and former clients are concentrated in interactive media industries including game development, Esports, AR/VR tech, 3D animation, and artificial intelligence. Michael also advises companies in the cleantech and life sciences sectors.

His favorite video game is Final Fantasy (VII), favorite board game is Twilight Imperium (IV) and favorite science fiction book is Ender’s Game.

Zoe Russell Managing Associate

Los Angeles

Zoe works on diverse employment litigation matters. She is also active in pro bono matters.

Zoe received her J.D. from the University of California, Los Angeles School of Law, where she simultaneously earned her M.A. in African American Studies. While in law school, she served as the Co-Chair for the Black Law Students Association and the Director of Affordable Housing for the UCLA Graduate Students Association.

Diana M. Rutowski Partner

Silicon Valley

As a seasoned IP litigator and counselor, Diana’s practice has run the gamut from high stakes trials, to take-down and anti-counterfeiting campaigns, to employee departure and trade secret investigations. She represents clients in District and state courts and before administrative bodies including the ITC and the USPTO. For example, Diana tried and won a complex case in which the other side sought to extend the monopoly of an expired utility patent by claiming trade dress rights in a technical product feature. Drawing upon experience handling both complex patent and trademark matters, her team successfully argued that the intersection of patent and trademark policy prevented the other side from continuing its monopoly, clearing the way for her client to enter the market. With Diana at their side, companies can rest assured that their essential assets are protected, from their core technologies, to assets including their company name, logo, and website.

While at Orrick, Diana was seconded to the City and County of San Francisco, where she had the privilege to serve as an Assistant District Attorney, and first-chair several trials. She was also seconded to Salesforce, where she learned first-hand that the law comprises just one component of a company’s overall business strategy.

Diana is also passionate about her pro bono work. For example, she represented two detainees in Guantanamo in connection with their petitions for a writ of habeas corpus, and she is currently working with the Lawyers’ Committee for Civil Rights of the San Francisco Bay Area. Before joining the firm, Diana worked for the Legal Aid of Cambodia where she assisted with the prosecution of former Khmer Rouge officials and represented individuals who sought to reclaim land rights.

Diana is a member of the International Trademark Association, of ChIPs: Advancing Women in IP and of the Harvard Club of San Francisco.

Kathryn Ryan Partner

Washington, D.C.

She represents banks, first and second mortgage originators and servicers, reverse mortgage originators and servicers, fulfillment service providers, commercial lenders and servicers, bank holding companies, private equity firms, finance companies, debt collection companies, financial institutions and technology companies, payment processors, money transmitters and various related service providers.

Katy assists clients with matters before state regulatory agencies, the Consumer Financial Protection Bureau (CFPB), the Department of Justice (DOJ), the Department of Housing and Urban Development (HUD), federal banking agencies, Fannie Mae and Freddie Mac. She also provides strategic and tactical advice to help clients identify and secure the nationwide federal and state approvals necessary to achieve operational goals.

Prior to joining Orrick, Katy was a partner at Buckley LLP, where she was a member of the firm’s partner board.

Nick Sabatino Senior Associate

Sacramento

Nick represents a diverse range of stakeholders throughout the capital structure in complex restructuring scenarios. His practice encompasses representing institutional creditors, financial institutions, funds, direct lenders, and strategic investors in bankruptcy proceedings, out-of-court workouts, and distressed asset acquisitions.  He has significant experience with debtor-in-possession financing, pre-packaged Chapter 11 proceedings, Section 363 sales, and contested bankruptcy litigation matters.

Nick has developed particular expertise in distressed M&A transactions across multiple industries, including energy and infrastructure, life sciences, cryptocurrency, and retail sectors. He regularly works with clients to structure and execute credit-bid acquisitions, private sales, and strategic investments in distressed companies. His cross-practice approach allows him to collaborate effectively with Orrick’s M&A, Banking & Finance, and Energy & Infrastructure teams to deliver comprehensive solutions to complex distressed situations.

Beyond traditional restructuring work, Nick’s experience extends to non-distressed transactions, including real estate purchases and syndicated loan refinancing. He brings a strategic and detail-oriented approach to each matter, working collaboratively with clients to navigate challenging financial circumstances and achieve business objectives.

Emily Sabo Senior Associate

New York

She represents a variety of market participants, including sponsors, issuers and underwriters, in public and private offerings of commercial mortgage-backed securities (CMBS).

Formerly, an associate at Thacher Proffitt and Wood, LLP in New York City (also in the Structured Finance group), Emily left Manhattan in 2008 and founded and operated her law firm in the U.S. Virgin Islands, providing a wide variety of legal services, spanning from general civil litigation and bankruptcy litigation, to estate planning, probate, commercial contracts, and general business and transactional law. She also acted as a legislative consultant to a USVI Senator working to craft legislation in various fields, including without limitation, renewable energy law. As part of her diverse practice, and before she engaged in consulting work for the Senator, Emily gained invaluable experience in the field of renewable energy (including related policies and legislation) when she was hired by an off-island private power company to act as legal counsel for all transactional, regulatory and litigation work necessary to complete a ground breaking renewable energy project on the island of St. Thomas.

At Thacher Proffitt & Wood, LLP, Emily represented issuers, underwriters, sellers and servicers in mortgage-backed securities transactions (including public and private offerings of residential and commercial mortgage-backed securities); she also represented banks and other financial institutions in their capacities as lenders, borrowers, issuers and purchasers in structured finance transactions and in connection with asset-based and other secured lending transactions and warehouse facilities with collateral spanning various asset classes.   Prior to her structured finance experience, Emily worked in Merrill Lynch’s State Regulation, Legislation and Government Affairs Department researching, state securities laws, drafting responses for securities litigation and compliance matters and participating in industry committee conferences regarding pending state legislation of industry-wide concern.

Rohit Sachdev Partner

San Francisco

Rohit has extensive experience in the solar, wind, energy storage, and biofuel sectors, and has advised on numerous award-winning transactions. He is recognized by Chambers USA and Chambers Global in the Projects: Renewables & Alternative Energy category. Rohit’s clients describe him as “excellent,” “knowledgeable,” “timely in his work,” “commercially-oriented,” “very plugged into the market” with a “great demeanor."

In recent years, Rohit's practice has focused particularly on project development and project M&A transactions. He has successfully negotiated many GWs of "physical" and "virtual" PPAs and tolling agreements, as well as a variety of construction, supply and other development arrangements. Rohit has also represented clients on the purchase and sale of renewables projects in various U.S. jurisdictions, as well as joint venture and other project asset arrangements. He has particularly focused on the development, financing and sale of domestic and international energy storage projects, including stand-alone, hybrid, front-of-meter and behind-the-meter projects.

Rohit co-leads Orrick’s South Asian Inclusion Network and served as a Fellow for the Leadership Council on Legal Diversity.

He started his legal career at an international law firm in New York, where he focused on project development and project finance transactions across the globe. Prior to law and business schools, Rohit was an investment banking analyst at Credit Suisse in San Francisco where he provided M&A and financial advisory services to technology companies in Silicon Valley.