Important Updates
Important Updates
September 25, 2025 | Saudi ArabiaAsharq Al Awsat: السعودية تمضي مع «رؤية 2030» بدعم التصنيع والتوطين وتوسع الاقتصاد
September 26, 2025 | United StatesBusiness Insider: Trump's $100,000 Visa Fee Threatens Wall Street's Pipeline of Junior Bankers and Tech Talent
September 26, 2025 | CanadaCanada: Artificial Intelligence Screening Piloted at Border Crossings
September 26, 2025Moldova: Digital Nomad Visa Introduced
September 26, 2025 | South AfricaSouth Africa: Additional Concession Granted for Individuals With Pending Applications Due to Processing Delays
September 25, 2025 | Saudi ArabiaAsharq Al Awsat: السعودية تمضي مع «رؤية 2030» بدعم التصنيع والتوطين وتوسع الاقتصاد
September 26, 2025 | United StatesBusiness Insider: Trump's $100,000 Visa Fee Threatens Wall Street's Pipeline of Junior Bankers and Tech Talent
September 26, 2025 | CanadaCanada: Artificial Intelligence Screening Piloted at Border Crossings
September 26, 2025Moldova: Digital Nomad Visa Introduced
September 26, 2025 | South AfricaSouth Africa: Additional Concession Granted for Individuals With Pending Applications Due to Processing Delays
September 25, 2025 | Saudi ArabiaAsharq Al Awsat: السعودية تمضي مع «رؤية 2030» بدعم التصنيع والتوطين وتوسع الاقتصاد
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William Diaz

Senior Manager

William Diaz

William Diaz
William Diaz
  • People

Senior Manager

William Diaz

Country / Territory

  • United KingdomUnited Kingdom

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin
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William is a Senior Manager based in Fragomen’s London office. He assists clients in a variety of industries including finance, technology and entertainment, with a particular emphasis on assisting with complex consular filing for treaty investors, intracompany transferees and individuals of extraordinary ability.

William frequently advises small and medium-sized enterprises throughout the EMEA region in expanding to the U.S. and transferring key personnel. These clients range from start-ups to long established businesses across a range of professions. 

He has previously volunteered with various organisations, including a civil liberties non-profit and an international criminal tribunal. 

Education

  • Leiden University, LL.M., 2011
  • Pace University School of Law, J.D., 2009
  • Fordham University, B.A., 2005

More from William

Admissions

Immigration Credentials: Registered Attorney with the United States Department of Justice’s Executive Office for Immigration Review, 2013-present

Bar Admissions: New York State

Professional accomplishments

Member, American Immigration Lawyers Association (AILA)

Former Member, AILA CBP Liaison Committee

Experience

Obtained a nonimmigrant waiver of inadmissibility for a noted entertainer with previous criminal convictions.

Advised a multinational vehicle manufacturer in transferring key managerial and technical personnel for the expansion of their U.S. operations.

Helped a search engine provider with a complex business ownership structure acquire E-2 company registration and transfer key managers and executives to the United States.

Devised strategies to ensure a television production company could transfer key talent on an expedited basis during a period of prolonged global disruption in U.S. visa issuance.

Advised a start-up technology marketing firm and guided U.S. expansion strategy to support treaty investor visas for key managerial and specialist personnel.

Publications and lectures

Author, “Tech and Global Mobility: The impact of the new US Administration.” Computer Weekly, 4 March 2025.

Panelist, “Bobbing for Visas: Alternative Uses for the B Visa Category.” AILA Rome District Chapter Fall Conference 2023, London, UK, October 2023.

Presenter, “US Growth Programme: Visas for investment and expansion.” TechNation US Growth Workshop 3.0, London, UK, September 2022.

Panelist, “Ch-Ch-Changes: Regulatory, Policy, and Adjudications.” AILA National Conference 2020, Webinar, July 2020.

Presenter, “US Visas for Irish Investors.” Dublin Chamber of Commerce, Dublin, Ireland, February 2020.

Presenter, “Obtaining the Right Visas.” UK Department of International Trade, Cambridge, UK, October 2019.

Presenter, “Visa for US expansion.” Fingal Dublin Chamber, Dublin, Ireland, February 2019.

Presenter, “US Immigration for Investors.” South West World Trade Summit, Bristol, UK, July 2018.

Presenter, “US Immigration for Latvian Investors.” Gateway to the USA Program, Riga, Latvia, May 2018.

Panelist, “Humanitarian Options of Last Resort.” AILA National Conference 2017, New Orleans, Louisiana, June 2017.

Co-author, “Humanitarian Options of Last Resort.” AILA Immigration Practice Pointers (2017-18 Ed.), Pages 575-585, 2017.

Panelist, “Advanced E Visas.” AILA Rome District Chapter Fall Conference 2016, Amsterdam, Netherlands, October 2016.

Author, “Common US immigration consequences of mergers and acquisitions.” Human Resource Management International Digest, Volume 23, Issue 7 (2015). Print and web.

Author, “Want to work in the US? The secret to securing a successful application.” The Stage, September 25, 2015. Web.

Author, “Global Mobility Strategies for SMEs Expanding to the US.” Corporate Vision Magazine, August 2015: 42-43. Print and web.

Author, “From Posting to Permanent Residency.” Global: The International Briefing, December 2015: 40-41. Print and web.

Author, “Transferring Professional Athletes to the U.S.” HRreview, July 10, 2015. Web.

Author, “US visa eligibility: five HR issues when transferring employees.” Personnel Today, August 28, 2015. Web.

Panelist, "Legal IT Roundtable." Roundtable event, The Law Society Gazette, London, UK, July 2015.

Presenter, “US immigration for start-ups.” Presentation, Access to the US and the US Ignite Program, London, UK, June 2015.

Contributor, “Clarkson faced police interview over attack.” The Times, 27 March 2015.

Presenter, “US immigration overview.” Presentation, Techstars, London, UK, January 2015.

Author, “Dualist, but not Divergent: Evaluating United States Implementation of the 1267 Sanctions Regime.” Liberty University Law Review, Volume 5, Issue 3 (2011): 333-378. Print and web.

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

Country / Territory

  • United KingdomUnited Kingdom

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Get in touch

Languages

  • English

Contact information

Email

[email protected]

T:+44 (0)207 090 9272

F:+44 (0)207 090 9101

London

Fragomen LLP

1st Floor, 95 Gresham St,

London EC2V 7NA

United Kingdom

Connect via Linkedin

William’s insights

March 5, 2025 | Media mentions

Computer Weekly: Tech and Global Mobility: The Impact of the New US AdministrationRead more

Share

  • Twitter
  • Facebook
  • LinkedIn

Share

  • Twitter
  • Facebook
  • LinkedIn

Explore more at Fragomen

Media mentions

Business Insider: Trump's $100,000 Visa Fee Threatens Wall Street's Pipeline of Junior Bankers and Tech Talent

Partner Bo Cooper explains how proposed H-1B fee and lottery changes impact hiring of skilled international talent across sectors.

Learn more

Media mentions

Asharq Al Awsat: السعودية تمضي مع «رؤية 2030» بدعم التصنيع والتوطين وتوسع الاقتصاد

Partner Haider Hussain underlines the role of talent mobility in shaping future growth sectors in the Kingdom.

Learn more

Fragomen news

Fragomen Spotlighted in Financial Times for 2025 Innovative Lawyers Europe Awards

Fragomen is recognised by the Financial Times for its innovative work in workforce mobility and cross-sector collaboration.

Learn more

Media mentions

Investopedia: ICE Crackdowns Are Changing Workplaces: 37% of Americans Report Feeling Less Safe at Work

Partner Daniel Brown outlines steps companies can take to support employees and maintain smooth operations during compliance-related situations.

Learn more

Awards

The Best Law Firms™ in Germany 2026 Recognizes Fragomen

Fragomen has been recognized in the 2026 edition of The Best Law Firms™ in Germany, earning a Regional Tier 1 ranking in Hessen for Labor and Employment Law.

Learn more

Media mentions

Khaleej Times: $100,000 H-1B Visa Fee to Boost Demand for UAE's Golden, Freelance, Remote Work Visas

Partner Shayan Sultan discusses a rise in inquiries about UAE residency and remote work programmes amid global talent mobility trends.

Learn more

Media mentions

Personnel Today: Sponsor Licence Revocation: What HR and Mobility Leaders Need to Know

Partner Rajiv Naik, Senior Manager Thomas Kingsmill and Manager Ko Ito highlight rising UK sponsor licence revocations and how HR and mobility leaders can manage the impact.

Learn more

Media mentions

Reuters: Financial Firms to Feel Outsized Impact From Trump's H-1B Overhaul

Partner Bo Cooper discusses the $100,000 H-1B fee and its impact on financial, banking and technology firms relying on international talent.

Learn more

Media mentions

CNBC: Europe’s Work-Life Balance a Key Talent Draw as Trump Revamps H-1B Visa

Partner Louise Haycock highlights how the UK's immigration system and Skilled Worker visa changes support employers in planning talent pipelines.

Learn more

Media mentions

The Wall Street Journal: Tech’s H-1B Debate: Is Trump’s New Fee a Solution or Setback?

Partner Audrea Golding explains how the $100,000 H-1B fee could affect hiring across the tech industry.

Learn more

Blog post

Visa Applications and Document Services: Avoiding Delays and Ensuring Compliance

Immigration Supervisor Nathalie Pimenta and Immigration Programme Manager Frida Sakaj discuss the importance of planning visa applications and document services early to avoid delays and ensure compliance with UK regulations.

Learn more

Fragomen news

2025年9月22日 アメリカ移民法速報Learn more

Media mentions

Business Insider: Trump's $100,000 Visa Fee Threatens Wall Street's Pipeline of Junior Bankers and Tech Talent

Partner Bo Cooper explains how proposed H-1B fee and lottery changes impact hiring of skilled international talent across sectors.

Learn more

Media mentions

Asharq Al Awsat: السعودية تمضي مع «رؤية 2030» بدعم التصنيع والتوطين وتوسع الاقتصاد

Partner Haider Hussain underlines the role of talent mobility in shaping future growth sectors in the Kingdom.

Learn more

Fragomen news

Fragomen Spotlighted in Financial Times for 2025 Innovative Lawyers Europe Awards

Fragomen is recognised by the Financial Times for its innovative work in workforce mobility and cross-sector collaboration.

Learn more

Media mentions

Investopedia: ICE Crackdowns Are Changing Workplaces: 37% of Americans Report Feeling Less Safe at Work

Partner Daniel Brown outlines steps companies can take to support employees and maintain smooth operations during compliance-related situations.

Learn more

Awards

The Best Law Firms™ in Germany 2026 Recognizes Fragomen

Fragomen has been recognized in the 2026 edition of The Best Law Firms™ in Germany, earning a Regional Tier 1 ranking in Hessen for Labor and Employment Law.

Learn more

Media mentions

Khaleej Times: $100,000 H-1B Visa Fee to Boost Demand for UAE's Golden, Freelance, Remote Work Visas

Partner Shayan Sultan discusses a rise in inquiries about UAE residency and remote work programmes amid global talent mobility trends.

Learn more

Media mentions

Personnel Today: Sponsor Licence Revocation: What HR and Mobility Leaders Need to Know

Partner Rajiv Naik, Senior Manager Thomas Kingsmill and Manager Ko Ito highlight rising UK sponsor licence revocations and how HR and mobility leaders can manage the impact.

Learn more

Media mentions

Reuters: Financial Firms to Feel Outsized Impact From Trump's H-1B Overhaul

Partner Bo Cooper discusses the $100,000 H-1B fee and its impact on financial, banking and technology firms relying on international talent.

Learn more

Media mentions

CNBC: Europe’s Work-Life Balance a Key Talent Draw as Trump Revamps H-1B Visa

Partner Louise Haycock highlights how the UK's immigration system and Skilled Worker visa changes support employers in planning talent pipelines.

Learn more

Media mentions

The Wall Street Journal: Tech’s H-1B Debate: Is Trump’s New Fee a Solution or Setback?

Partner Audrea Golding explains how the $100,000 H-1B fee could affect hiring across the tech industry.

Learn more

Blog post

Visa Applications and Document Services: Avoiding Delays and Ensuring Compliance

Immigration Supervisor Nathalie Pimenta and Immigration Programme Manager Frida Sakaj discuss the importance of planning visa applications and document services early to avoid delays and ensure compliance with UK regulations.

Learn more

Fragomen news

2025年9月22日 アメリカ移民法速報Learn more

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