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Looking for an expert to speak about Internet number resources? ARIN research and commentary is regularly referred to in governmental, civil society, and commercial reports, as well as the global IT media.  Please contact to request a speaker. Supply us with the date, venue, and a brief description of your needs.

Learn more about our speakers:

John Curran

President and CEO

John CurranJohn is the President and CEO of the American Registry for Internet Numbers (ARIN), responsible for leading the organization in its mission of managing the distribution of Internet number resources in its geographic region. He was also a founder of ARIN and served as its Chairman from inception through early 2009.

John’s experience in the Internet industry includes serving as CTO and COO for ServerVault, which provides highly secure, fully managed infrastructure solutions for sensitive federal government and commercial applications. Prior to this, he was CTO for XO Communications and was integral in leading the organization’s technical initiatives, network architecture, and design of leading-edge capabilities built into the company’s nationwide network. Mr. Curran also served as CTO for BBN/GTE Internetworking, where he was responsible for the organization’s strategic technology direction. He led BBN’s technical evolution from one of the earliest Internet Service Providers through its growth and eventual acquisition by GTE.

He has also been an active participant in the Internet Engineering Task Force (IETF), having both co-chaired the IETF Operations and Network Management Area and served as a member of the IPng (IPv6) Directorate.

Richard Jimmerson


Richard JimmersonRichard has been activity involved in Internet resource governance and education since the 1990s. As Chief Information Officer at the American Registry for Internet Numbers (ARIN), his primary focus is to ensure all registry services and systems meet the needs of ARIN customers.

Richard began his work with the Internet in the 1980s as a U.S. Marine through his participation in projects that converted military systems to use TCP/IP. Since that time, he has built community engagement programs and services for both ARIN and the Internet Society with recent focus on the importance of industry-wide IPv6 deployment. He has communicated with thousands of companies about their adoption of new technologies and is a strong advocate of open Internet standards.

Nate Davis


Nate DavisNate Davis is the Chief Operating Officer for the American Registry for Internet Numbers (ARIN). Nate oversees ARIN’s daily business operations including communications and member services, registration services, financial services, human resources and administration, and engineering. Nate has over twenty-five years of experience in technical, managerial, and executive roles across various industries, both for profit and non-profit. Since joining ARIN in June 2004, Nate has participated and presented in various forums such as the NANOG, LACNIC, RIPE, APNIC, AFRINIC, Caribbean Association of National Telecommunication Organizations (CANTO), and Caribbean Telecommunications Union (CTU).

Nate earned a B.S. in Decision Sciences/Information Systems from George Mason University in 1985 and a M.S. in Information Systems from George Washington University in 1990.

Cathy Handley

Executive Director of Government Affairs and Public Policy

Cathy HandleyCathy Handley is the Executive Director of Government Affairs and Public Policy for the American Registry for Internet Numbers (ARIN). She is responsible for relationships with the governments in the ARIN service region, which includes Canada, many Caribbean and North Atlantic Islands and the United States. In addition, she is also responsible for ARIN’s relationships with various International Government Organizations and Non-Governmental Organizations worldwide and was a member of the Internet Governance Forum Multistakeholder Advisory Group. Cathy has an extensive background in both the private and public sector.

Einar Bohlin

Government Affairs and Public Policy Analyst

Einar Bohlin

Einar Bohlin is the Government Affairs and Public Policy Analyst at the American Registry for Internet Numbers (ARIN). He works with the Executive Director Government Affairs and Public Policy to maintain our relationships with the governments in the ARIN service region, which includes Canada, many Caribbean and North Atlantic Islands and the United States. He also participates in the discussions at organizations such as CITEL and the ITU to expand awareness of number resource issues and ARIN policies. Prior to ARIN he worked as a Number Analyst at UUNET and an IP Analyst at InterNIC/Network Solutions where he handled IP number, ASN, and in-addr requests.

Leslie Nobile

Senior Director of Global Registry Knowledge

Leslie NobileLeslie Nobile is the Senior Director of Global Registry Knowledge at the American Registry for Internet Numbers (ARIN). Her current focus is to develop and maintain a comprehensive repository of Internet number registry data accuracy and integrity practices globally, and to provide strategic and tactical advice to ARIN’s CEO aimed at improving ARIN’s registry service. Prior to that, Leslie served as ARIN’s Director of Registration Services for 14 and ½ years where she was responsible for the overall development, direction and operation of the department.

Leslie has over 25 years of experience in the Internet industry, where she has held various technical management positions. Her previous work includes Internet registry operations at the DDN/DoD Network Information Center (NIC), as well as technical support of the development and expansion of the Defense Data Network (DDN), a high-speed military data network that evolved from the ARPANET.
Leslie has been a contributing author to RFCs, Internet Society (ISOC) articles, and various other industry publications and has been actively involved in the global coordination of Internet addressing policy. She has represented ARIN at various industry forums including RIR meetings, ICANN, NANOG, Caribbean Telecommunications Union, ARIN on the Road, ARIN Government Working Group, and various law enforcement venues and cyber crime conferences.

Leslie received her B.A. from the American University in Washington, D.C.

John Sweeting

Senior Director of Registration Services

John Sweeting John Sweeting is the Senior Director of Registration Services of the American Registry for Internet Numbers (ARIN), responsible for the overall development, direction and operation of the department. Prior to joining ARIN staff, he served 12 years on the ARIN Advisory Council, 6 of which he was the Chair, and 1 year on the Address Supporting Organization’s Address Council (ASO AC). John served on the Consolidated RIR IANA Stewardship Proposal (CRISP) team which was convened in December 2014 to guide development of the Number Community response to the IANA Stewardship Transition Coordination Group’s RFP.

John’s experience in the Internet industry includes building and managing large global networks with international carriers such as MCI, Cable & Wireless, Teleglobe and Tata. Most recently John served as the Senior Director of Architecture & Engineering for Time Warner Cable, responsible for the selection and testing of all network infrastructure from the core backbone to the service delivery platforms.

John also served 24 years in the United States Army and retired as a Chief Warrant Officer in the Signal Corps.

Jon Worley

Technical Services Manager

Jon WorleyJon Worley is Technical Services Manager with ARIN and has been a member of the Registration Services team since 2004. He has experience with all ARIN policies and procedures for requesting, managing, and transferring IP addresses and AS numbers, including technical services such as ARIN’s RESTful API. Jon has spoken about these topics as well as IPv4 depletion and IPv6 adoption at many ARIN events.

Mark Kosters


Mark KostersMark Kosters is the Chief Technology Officer of the American Registry for Internet Numbers (ARIN), responsible for all engineering initiatives within the organization, leading both development and operations. Mark has over twenty-three years of experience as an applications developer, networking engineer, technical manager and executive. For eighteen years previous to his employment at ARIN, he has been a senior engineer at Data Defense Network (DDN) NIC, chief engineer and Principal Investigator under the NSF-sponsored Internet NIC (InterNIC), and Vice President of Research at VeriSign. Over his career, Mark has been involved in application design and implementation of core internet client/server tools, router administration, UNIX system administration, database administration, and network security. He has represented both network information centers in various technical forums such as the IETF, RIPE, APNIC, CaribNOG and NANOG. Additionally, he has co-authored many IETF RFCs running from directory services to IP Address Practices to improvements to DNSSEC.

Andy Newton

Chief Engineer

Andy NewtonAndy Newton is ARIN’s Chief Engineer responsible for software and systems design, development process and architecture, and standards development and research. He has over twenty years of software engineering experience, ranging from embedded systems, thick clients, and applications servers in a broad array of areas such as industrial controls, back office and work flow process, and voice-over-IP and more. Andy is the author of five published and ratified protocol specifications and is the primary author of the new RDAP specification. Additionally, he is well versed in other Internet technologies such as RPKI, DNS, and Whois. Andy also holds a black-belt rank in Judo.

Matt Rowley

Infrastructure Manager

Matt Rowley Matt Rowley is an Infrastructure Manager on ARIN’s engineering staff.  He has over 15 years of experience in operations roles focusing on network and systems design and implementation.  As one of the managers of ARIN’s Operations Team, Matt contributes to building, growing, and maintaining ARIN’s network infrastructure.  Matt has spoken about IPv6 and network security and open source firewalls at technical conferences such as CaribNOG.

Susan Hamlin

Director of Communications and Member Services

Susan HamlinSusan is the Director of Communications and Member Services at the American Registry for Internet Nubmers (ARIN). In this role Susan serves as the focal point for all ARIN communications and outreach to ARIN’s membership and regional community, including public relations and general education and training. Since joining ARIN in 2000, she has created and now oversees a Communications and Member Services Department which is responsible for facilitating ARIN elections, the Policy Development Process, the ARIN Fellowship Program, the planning and execution of ARIN Public Policy and Members Meetings, ARIN On the Road Events, the Get6 awareness campaign, other outreach activities and the ARIN websites ( and  Susan presents at ARIN on the Road and other industry events.

Sean Hopkins

Policy Analyst

Sean HopkinsSean Hopkins is ARIN’s Policy Analyst, where he assists the Advisory Council and the ARIN community in shepherding ideas for Internet Number Resource Policy through ARIN’s Policy Development Process and promoting community participation and understanding of ARIN’s policies. Sean has been a corporate communications professional for ten years, spending the last six as part of ARIN’s Communications and Member Services Department.