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Simpson Thacher & Bartlett

International law firm delivering transactional services

Senior Security Architect

Full-Time
$190k - $240k/yr
Expert
Bachelor's
New York, NY, USA
HybridHybrid work arrangement in New York.
CybersecuritySecurity Engineering & Architecture
No H1B Sponsorship

About the job

Requirements
  • A bachelor's degree in information security, IT, a related discipline, or equivalent experience.
  • At least 10 years of experience in an IT or Information Security role, including at least 5 years in an enterprise or security architecture role.
  • Strong technical knowledge of security frameworks, security tools, encryption standards, authentication and authorization standards, and infrastructure security standards.
  • Deep expertise in infrastructure security, identity and access management, data protection, and application security.
  • Knowledge of artificial intelligence and machine learning, cloud platforms, and hybrid architecture.
  • Experience planning and building enterprise cloud security at scale and mitigating security threats in the cloud.
  • Experience working in a global organization and broad knowledge of security domains, technology risk management concepts, and security and risk frameworks.
  • Knowledge of common application architectures, design, protocols, and agile deployment methodology and best practices.
  • Hands-on engineering experience across servers, endpoints, networks, mobile devices, and cloud computing.
  • Knowledge of core networking concepts, including TCP/IP, firewalls, and network security products.
  • Ability to create and execute a clear strategic vision for target-state architecture that supports and enables business functions.
  • Ability to manage multiple concurrent projects and activities and make effective judgments in prioritizing and allocating time.
  • Ability to execute with limited information and ambiguity.
  • A demonstrated aptitude for understanding strategic investments and new technologies.
  • Ability to build collaborative relationships and interact frequently with leadership and internal and external stakeholders.
Responsibilities
  • Define, establish, and continuously evolve the enterprise security architecture framework in alignment with business and technology strategy.
  • Develop and maintain target-state security architecture roadmaps aligned with enterprise architecture and business objectives.
  • Participate in the firm's IT architecture review board to ensure that new initiatives and projects adhere to the firm's security architecture strategy, including reviewing and approving key design documents.
  • Architect and guide secure implementations across hybrid environments, including on-premises, cloud, and containerized platforms.
  • Establish and enforce secure configuration management and system-hardening standards.
  • Define standards and best practices for the secure use of artificial intelligence, including data protection, access controls, and safe consumption patterns.
  • Evaluate and secure enterprise adoption of AI-powered tools, platforms, and third-party services.
  • Partner with engineering teams to embed security controls into artificial intelligence and machine-learning lifecycles.
  • Create technical security standards and guidelines for IT assets, including servers, endpoints, cloud platforms, hypervisors, mobile devices, network devices, and emerging technologies.
  • Conduct security architecture reviews to identify gaps and risks and drive remediation strategies.
  • Document the impact of new systems and integrations on the firm's overall security posture.
  • Oversee the security tools portfolio, including selection, deployment, and integration across the technology stack.
  • Lead proofs of concept, testing, and integration of new security tools, services, configurations, and risk-mitigation strategies.
  • Design and implement cybersecurity solutions to prevent unauthorized access, detect threats, and mitigate cyberattacks across IT systems.
  • Serve as a trusted advisor to business, IT, and product organizations on security architecture and technology risk management.
  • Define and report key performance indicators to measure security effectiveness and maturity.
  • Stay current on emerging threats, technologies, and industry trends to proactively reduce organizational risk.
  • Build cross-functional partnerships across global teams and external stakeholders.
Desired Qualifications
  • Professional certifications such as Certified Information Systems Security Professional, Certified Cloud Security Professional, Certified Information Security Manager, or similar.

About the company

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Simpson Thacher & Bartlett

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Simpson Thacher & Bartlett is a large, long-established international law firm with about 1,500 lawyers. It helps clients worldwide by providing coordinated legal advice and transactional capabilities across multiple practice areas, drawing on offices in major financial and business centers (New York, London, Hong Kong, Tokyo, Beijing, São Paulo, etc.). The firm works through a network of attorneys to handle complex transactional work, mergers and acquisitions, financing, litigation, and other corporate matters for clients globally. Its differentiator is its global reach, depth of experience, and long history dating back to 1884, enabling it to offer coordinated, cross-border legal services at scale. The firm’s stated goal is to deliver high-quality legal services to clients around the world, leveraging its international platform and experienced lawyers to meet diverse legal needs.

Company Size

1,001-5,000

Company Stage

N/A

Total Funding

N/A

Headquarters

New York City, New York

Founded

1884

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Simplify's Take

What believers are saying

  • On September 8, 2026, Simpson defeated class certification for HCA in North Carolina.
  • On July 15, 2026, it hired Emma Rachmaninov to co-head European funds regulation.
  • On April 20, 2026, it added Chelsea Pullen and Tam Ho for digital infrastructure.

What critics are saying

  • Weil poached Simpson partner Iliana Karaoglan in June 2026, signaling dangerous reciprocity.
  • Bloomberg reported October 1, 2026 talks for Tom Richards to join Simpson from Weil.
  • If partner defections continue, Simpson loses its sponsor franchise by 2027.

What makes Simpson Thacher & Bartlett unique

  • Simpson Thacher pairs elite private equity, funds, tax, and regulatory teams across deals.
  • Its 2026 hires deepened sponsor-side coverage in London, New York, and Los Angeles.
  • It won HCA class-certification defeat and ranked first in Q2 2026 energy infrastructure.

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Benefits

  • Hybrid Work Options
  • Professional Development Budget

Company News

Hello Woodlands
Oct 7th, 2026
David Borde named president and CEO of Entergy Texas.

David Borde named president and CEO of Entergy Texas. David Borde has been named president and CEO of Entergy Texas, succeeding Eliecer Viamontes, who has departed the company for other opportunities. The change is effective Oct. 5. "Eli has been a tremendous leader and a great colleague, and his many years of experience will serve him well in this next chapter," said Drew Marsh, chair and CEO of Entergy. Borde currently serves as vice president, utility strategy and regulatory initiatives, where he has supported Entergy's operating companies in executing the company's overall customer-centric strategy by supporting regulatory and tariff filings and providing ongoing strategic and regulatory counsel. His regulatory focus has allowed the organization to keep pace with evolving customer needs and expectations. Borde joined Entergy in 2009 and served as director of corporate development based in Texas. He later served as Entergy's vice president of investor relations and in various leadership roles, including serving within the company's utility finance business partner organization. "David has extensive experience in utility strategy, regulatory affairs and utility finance, along with his deep understanding of our business and customers," said Marsh. "He is a thoughtful and proven leader, and he will build on the strong foundation in Texas while advancing our commitment to providing safe, reliable and affordable energy to the communities we serve." Prior to joining Entergy, Borde worked in the investment banking division of Citigroup USA and as a lawyer at Simpson Thacher & Bartlett. He earned a Juris Doctor degree from Duke University's School of Law in 2001 and holds a degree in business from the University of Paris.

Schulte Roth & Zabel LLP
Oct 1st, 2026
Simpson Thacher further strengthens market- leading asset management platform.

Simpson Thacher further strengthens market- leading asset management platform. Simpson Thacher & Bartlett LLP today announced that Brian Parness, Simon Saitowitz, Andrew Nichol, Corey Dietrich and Alexander Miachika have joined, and that Charles Cooper-Isow will join, the Firm as Partners, further expanding capabilities across asset management M&A, GP-stakes transactions, secondaries and other strategic sponsor transactions. Brian will lead the Firm's Sponsor Transactions and Advisory Practice, a multidisciplinary team that encompasses the full suite of asset manager-related transactions, including M&A, GP-stakes, strategic partnerships and secondary liquidity solutions. "Simpson Thacher provides outstanding integrated, holistic support across asset manager transactions, investment funds and related sponsor advisory matters to our private equity sponsor and asset manager clients," said Alden Millard, Chair of Simpson Thacher's Executive Committee. "With deep expertise across these areas, Brian, Simon, Andrew, Corey, Alexander and Charles add significant firepower to our exceptional bench." "The market for strategic transactions involving alternative asset managers has become one of the most dynamic areas of private capital," said Elizabeth Cooper, Global Head of Private Equity at Simpson Thacher. "Asset manager consolidation, the maturity of the GP-stakes market and the continued demand for sophisticated liquidity solutions are creating transformative opportunities for private equity sponsors and asset managers." "The funds landscape continues to evolve. In tandem with Stephanie Srulowitz's recent joining, the addition of this New York-London team brings the sector knowledge, market relationships and execution experience clients need as these transactions become more complex, global and interconnected across transaction types and jurisdictions," said Michael Wolitzer, Chair of Funds and Funds Adjacencies at Simpson Thacher. "Simpson Thacher has built one of the world's premier platforms for advising private equity sponsors and asset managers on their most important strategic transactions and fund-related matters," said Brian. "The Firm's strength across M&A, investment funds and transactions, registered funds, insurance, tax and executive compensation creates a powerful foundation for a seamless Sponsor Transactions and Advisory Practice. I am excited to further expand these capabilities with best-in-class colleagues in New York, London and across the Firm." Brian, Simon, Andrew, Corey, Alexander and Charles bring extensive experience advising the world's leading asset managers, private equity sponsors and institutional investors on the strategic transactions and advisory matters that shape alternative asset management businesses, including GP-stakes transactions, GP-led secondary transactions, continuation fund vehicles, seed and strategic investments, succession planning, platform investments and governance structuring. The team regularly represents both buy-side and sell-side participants in complex transactions involving alternative asset management firms across strategies, geographies and asset classes. The team has been recognized by leading industry and legal publications, including Chambers, The Legal 500, Law360 and Secondaries Investor, for their work across asset management M&A, private equity and secondaries. Drawing on its leading private equity, M&A, investment funds, fund transactions, tax, executive compensation, regulatory and financing capabilities, Simpson Thacher serves many of the world's most sophisticated private equity sponsors and asset managers. The Firm's Sponsor Transactions and Advisory Practice provides complementary capabilities across the Firm to deliver coordinated advice on GP-stakes sales and acquisitions, secondary transactions, continuation fund vehicles, strategic M&A, governance and succession planning, and platform investments. Team and contacts. Related insights. Related services. Related Practice areas. Related industries.

GFM Limited
Sep 24th, 2026
Paul Weiss adds three Weil partners to private equity team in New York.

Paul Weiss adds three Weil partners to private equity team in New York. * September 24, 2026 * - 10:30 am Paul Weiss is expanding its private equity practice in New York with the hire of three Weil partners, who will join former Weil private equity co-head Chris Machera at the firm, according to a report by the Global Legal Post. Private equity M&A partner Timothy Burns, tax partner Noah Beck and executive compensation partner Amanda Rotkel are expected to join Paul Weiss in the coming weeks, alongside two associates. Machera moved to Paul Weiss in New York at the end of August. The group has advised a broad range of private equity clients in recent years, including Blackstone, CVC Capital Partners, Goldman Sachs Asset Management and TPG. Paul Weiss chair Scott Barshay said the team would strengthen the firm's focus on advising private equity clients on major transactions. The appointments come amid a series of senior departures from Weil, a firm with about 1,200 lawyers. Earlier this month, Weil corporate department chair Michael Aiello announced plans to move to Cravath, Swaine & Moore with five M&A partners. Sullivan & Cromwell has also recruited senior Weil lawyers, including London co-managing partner David Avery-Gee and corporate partner Sarah Flaherty. The firm has been expanding its London corporate and private equity capabilities through a series of lateral hires. Several Weil partners have also moved to Simpson Thacher & Bartlett this year, including US private funds co-head Stephanie Srulowitz and GP stakes and investment management partner Andrew Nichol, both in New York.

Schulte Roth & Zabel LLP
Sep 14th, 2026
Simpson Thacher expands litigation bench with former DOJ antitrust official.

Simpson Thacher expands litigation bench with former DOJ antitrust official. Simpson Thacher & Bartlett LLP today announced that Megan Lewis, a former senior official in the U.S. Department of Justice, has joined the Firm as a Litigation Partner in its Washington, D.C. office, further strengthening the Firm's capabilities in high-stakes antitrust litigation, enforcement and regulatory matters. "Meg brings exactly the kind of sophisticated enforcement, litigation and government experience clients need as antitrust scrutiny continues to intensify," said Lynn Neuner and Jon Youngwood, Global Co-Chairs of the Firm's Litigation Department. "Her DOJ experience - particularly advising senior leadership on high-profile antitrust enforcement and congressional oversight matters - gives her a rare perspective on how complex investigations are shaped, advanced and resolved." "Meg is known for her exceptional track record in both government and private practice handling high-stakes criminal antitrust investigations as well as complex civil antitrust investigations and litigation," said Peter Guryan, Sara Razi and Antonio Bavasso, Global Co-Chairs of the Firm's Antitrust and Trade Regulation Practice. "She will be a tremendous asset to our team, further strengthening our ability to advise clients on their most consequential competition matters. We are excited to welcome her to Simpson Thacher." Over the last two decades of her career, Meg has worked inside and outside the government on a wide range of antitrust and other complex matters. As a former Assistant Chief in the Antitrust Division of the DOJ, Meg supervised criminal investigations involving price fixing, bid rigging, market allocation, algorithmic pricing issues and criminal monopolization across a variety of industries. Leveraging that experience in private practice, she counsels and represents clients on civil and criminal antitrust matters, including complex cross-border investigations, parallel civil litigation and engagement with enforcers. Additionally, Meg's experience serving in leadership roles in the Offices of the Deputy Attorney General and Legislative Affairs at DOJ provides a unique perspective and skill in navigating matters that garner public attention and congressional oversight. Simpson Thacher's Antitrust and Trade Regulation Practice advises companies across every major industry on their global antitrust and competition needs, as well as on regulatory issues impacting their interests and operations around the world. "Simpson Thacher has built one of the premier antitrust practices in the world. I'm excited to join this exceptional team and help clients navigate their most complex competition and strategic challenges," said Meg. Simpson Thacher's Global Litigation Department represents a wide range of sophisticated clients, including corporations, financial institutions, boards, audit and special committees, and senior executives in their most significant matters. The Firm leverages its substantial bench of talent and broad experience to effectively handle litigations, government and internal investigations, arbitrations and cross-border disputes in North and South America, Asia and Europe. The team has been recognized by Chambers & Partners, The Legal 500, Benchmark Litigation, The American Lawyer, National Law Journal, New York Law Journal, Law360, Global Competition Review, Global Investigations Review, The Recorder, Daily Journal and many others. Team and contacts. Related insights. Related services. Related practice areas.

Schulte Roth & Zabel LLP
Sep 14th, 2026
Simpson Thacher named "International Law Firm of the Year" at 2026 Asia Legal Awards.

Simpson Thacher named "International Law Firm of the Year" at 2026 Asia Legal Awards. Simpson Thacher was selected as Law.com International's "International Law Firm of the Year" at the 2026 Asia Legal Awards, earning one of the competition's four Grand Prize honors. The award, determined by direct feedback from clients and peers, recognized the Firm's track record of delivering innovative, cutting-edge solutions for clients across the region, the unmatched market-leading strength of its key partners and teams, and its sustained exceptional performance in the Asian legal market. The Firm's recognition extended beyond the Grand Prize honor. Simpson Thacher was also named "Banking & Finance Firm of the Year," and partner Makiko Harunari was honored as "Banking & Finance Lawyer of the Year," a testament to the depth and caliber of the Firm in the region. Held annually, the Asia Legal Awards recognize the most important transactions and outstanding legal work in Asia. For more information and to view the full list of winners, please click here. Team and contacts. Related insights. Related services.