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Organizational Structure and Staff List

ARIN Organization Chart

ARIN is structured to operate as a service organization that is responsive to the needs of the public it serves. It is organized and driven by the users in the community and is thus able to keep in step with their requirements. ARIN is comprised of the following departments, highlight each for a description.

ARIN Community and Membership

Anyone with an interest in Internet number resource management in the ARIN region can be part of the ARIN community. In addition, the ARIN community specifically includes:

You do not need to be an ARIN Member to apply for resources from ARIN or to participate in ARIN's Policy Development Process. However, to become a member, you must first hold Internet number resources from ARIN. For a complete explanation of membership, please see the Membership Overview page

Board of Trustees

The Board of Trustees, elected by the ARIN membership, establishes and maintains authority over ARIN's scope, mission, and strategic and fiscal direction. The Board also oversees committee nominations, appointments, elections, and votes on community-developed draft policies in accordance with the Policy Development Process (PDP). For the current members of the Board, links to meeting minutes, and other information, please see the Board of Trustees page.

Advisory Council

Elected by the ARIN membership, the Advisory Council (AC) advises the Board of Trustees on Internet number resource policy and related matters and forwards Recommended Draft Policies to the Board for ratification, in adherence with the Policy Development Process (PDP). Additional information can be found on the Advisory Council page.

President & CEO

John Curran bio

The Board of Trustees selects the President and directly determines compensation. The President:

  • Acts as Chief Executive Officer
  • Appoints and supervises all ARIN operational staff
  • Serves on the Board of Trustees
  • Acts in an advisory capacity to all other officers and trustees
  • Serves as an ex-officio member of the Advisory Council
  • Acts as a liaison between the Board of Trustees and the Advisory Council

Senior Management

Chief Operating Officer

The Chief Operating Officer oversees and maintains the day-to-day internal operations of ARIN and facilitates coordination between all departments working closely with each department director. Additionally, the COO coordinates and oversees interdepartmental projects, is responsible for execution of ARIN's internal program management, is primary liaison to ARIN legal counsel, and serves as chief of staff.

Chief Information Officer

The Chief Information Officer oversees and maintains community advocacy initiatives and fosters the incorporation of community perspective in the delivery of community-facing services, efforts, or projects. Additionally, the CIO coordinates community advocacy internally across departments and externally with other organizations.

Executive Director of Government Affairs and Public Policy

The Executive Director of Government Affairs and Public Policy oversees and maintains relationships with governments and key intergovernmental organizations for ARIN, working closely with the President of ARIN to accomplish the external mission, goals, and strategic plan of the company.

Associate General Counsel

ARIN's Associate General Counsel (AGC) oversees and monitors legal issues that may arise and works with the ARIN executive team and outside General Counsel on such issues. Additionally, the AGC interacts with community members and coordinates with various departments on responses to requests from members of the ARIN community that may require review from legal counsel.

Senior Director of Global Registry Knowledge

The Senior Director of Global Registry Knowledge develops and oversees an ongoing program of assessment of Internet registry data quality and integrity. The Senior Director also collects and reviews processes used to support registry integrity globally and develops recommendations for relevant process improvement within ARIN.

Caribbean Outreach Liaison

The Caribbean Liaison cultivates and maintains relationships with governments and Internet industry groups in the Caribbean portion of the ARIN region; and promotes participation in the policy development process by the various governments and Internet industry groups in the Caribbean portion of the ARIN region.

Senior Management and Support Staff
Name Title
Nate Davis Chief Operating Officer
Richard Jimmerson Chief Information Officer
Cathy Handley Executive Director of Government Affairs and Public Policy
Anne-Rachel Inné Executive Director of Government Affairs and Public Policy
Einar Bohlin
Government Affairs and Public Policy Analyst
Michael Abejuela Associate General Counsel
Jennifer Lee
Staff Attorney
Leslie Nobile Senior Director of Global Registry Knowledge
Bevil Wooding Caribbean Outreach Liaison
Erin Alligood Director of HR & Administration
Val Winkelman Director of Financial Services
Mark Kosters Chief Technology Officer
Susan Hamlin Senior Director of Communications and Member Services
John Sweeting Senior Director of Registration Services

ARIN Departments


The Engineering Department is responsible for development, implementation, and support of ARIN internal systems and technical community services. The department supports all other functional departments of the organization. Engineering is also responsible for working with the other Regional Internet Registries (RIRs) on various projects, as well as providing systems related support for community-based policy implementations.

Engineering Department
Name Title
Mark Kosters Chief Technology Officer
     Maureen Seiler Technical Manager
          Olivia Bilby Software Test Engineer
          Jill Carlson Software Integration Analyst
          David Goodspeed Junior Software Test Engineer
          Hema Kalathur Software Test Engineer
          Kris Langhorn Senior Software Test Engineer
          Grace Wang Senior Software Test Engineer
          Liang Xu Senior Software Test Engineer
          Ming Yan Senior Software Test Engineer
     Debra Martin Senior Project Manager
          Sherrie Link Project Manager (Part-Time)
     Andy Newton Chief Engineer
          Jan Blacka Senior User Experience Specialist
          Leo (Liangbo) Deng Senior Software Engineer
          Nick Guichon Software Engineer
          Matt Haimbach Junior Software Engineer
          Jesse Helfrich User Experience Designer
          Frank Hill Software Engineer
          Ed MacDonald Senior Software Engineer
          Eric Parton Software Engineer
          Bill Ponting Software Engineer
          Jasdip Singh Senior Software Engineer
          Avneet Wadhwani Senior Software Engineer
     Pete Toscano Network Operations Manager
          Andrew Astapov Support Engineer
          Octavis Jones Support Engineer
          Frankie McDonough Systems Administrator
          Richard Sarmiento Security Engineer
          Steve Scally Security Engineer
     Matt Rowley Infrastructure Manager
          Georg Anderson Network Administrator
          Steve Bambling Systems Administrator
          Robert Bellante Systems Administrator
          Mike Crossin Database Systems Administrator
          David Jeffers Database Systems Administrator
          Michael O'Neill Senior Network Engineer

Registration Services

The Registration Services Department is responsible for the allocation and assignment of all Internet number resources within the ARIN region. Responsibilities include:

  • IPv4, IPv6, and Autonomous System Number (ASN) registration and transfers
  • Help Desk operation
  • reverse delegation registration
  • Whois Directory Service
  • Routing Registry Maintenance
Registration Services Department
Name Title
John Sweeting Senior Director of Registration Services
     Cathy Clements Transfer Services Manager
     Eddie Diego Senior Resource Analyst
     Lisa Liedel Resource Services Manager
          Misuk Kwon Resource Analyst
          Christy Le Resource Analyst
          James Ricewick Resource Analyst
          Jonathan Roberts Resource Analyst
          Suzanne Rogers Paralegal - Registration Services
          Shawn Sullivan Resource Analyst
     Mike Pappano Senior Resource Analyst
     Jonathan Worley Technical Services Manager

Communication and Member Services

The Communications and Member Services Department is responsible for communications and outreach to ARIN's membership and community, including public relations, general education, and training. It is the focal point for all ARIN communications and provides support to all senior management and departments. The department also facilitates the Policy Development Process and elections, and conducts ARIN on the Road events and the Public Policy and Member Meetings.

Communications and Member Services Department
Name Title
Susan Hamlin Senior Director of Communications and Member Services
     Jennifer Bly Public Affairs Specialist
     Melissa Goodwin Meeting Planner
     Sean Hopkins Policy Analyst
     Hollis Kara Communications Manager
          Jason Byrne Senior Web Content Coordinator
          Kerry Carmichael Communications and Technical Writer
          Kim Kelly Communications Writer
          Erin Scherer Social Media and Outreach Coordinator
          Lauren Sisk Graphic Designer (Part-Time)
     Wendy Leedy Member Engagement Coordinator
     Mary Ryan Meeting Planner

Human Resources and Administration

The Human Resources and Administration Department is responsible for providing overall strategic direction for all activities related to acquiring personnel, managing employee compensation, internal company policies, administering payroll and staff benefits, employee training, office management and security, and travel administration.

HR & Administration Department
Name Title
Erin Alligood Director of HR & Administration
     Denise Alston Receptionist
     Sarah Ba Administrative Coordinator
     Thérèse Simcox Executive Assistant

Financial Services

The Financial Services Department is responsible for accounting, billing, budget management, contract administration, and the legal affairs of ARIN.

Financial Services Department
Name Title
Val Winkelman Director of Financial Services
     Tammy Rowe Accounts Receivable Manager
          Tanya Gomez Senior Account Service Representative
          Lindsay Norman Account Service Representative
          Amy Sanchez Senior Account Service Representative
          Amaris Wang Senior Collection Specialist

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