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Management Team

  • Brian Thompson

    H. Brian Thompson

    Founder & Executive Chairman of the Board

    H. Brian Thompson is the founder of GTT and has served as chairman of the company’s board of directors since January 2005 and as its executive chairman since October 2006. From January 2005 until October 2006, Mr. Thompson also served as GTT’s chief executive officer. Mr. Thompson continues to head his own private equity investment and advisory firm, Universal Telecommunications, Inc., focused on start-up companies and consolidations taking place in the information/telecommunications business areas both domestically and internationally. From December 2002 to June 2007, he was chairman of Comsat International, one of the largest independent telecommunications operators serving all of Latin America. He served as chairman and chief executive officer of Global TeleSystems Group, Inc. from March 1999 through September 2000. Mr. Thompson also served as chairman and CEO of LCI International, Inc., from 1991 until its sale to Qwest Communications International, Inc. in June 1998. He became vice chairman of the board for Qwest until his resignation in December 1998. From 1981 to 1990, Mr. Thompson served as executive vice president of MCI Communications Corporation. He currently serves as a member of the board of directors of Pendrell Corporation and Penske Automotive Group, Inc. Mr. Thompson served as the co-chairman for the Americas and is currently on the executive committee of the Global Information Infrastructure Commission, a multinational organization launched in Brussels in 1995 to chart the role of the private sector in the developing global information and telecommunications infrastructure. He serves as a member of the Irish Prime Minister’s Ireland-America Economic Advisory Board. Mr. Thompson received his Master of Business Administration from Harvard’s Business School and holds an undergraduate degree in chemical engineering from the University of Massachusetts.

  • Ernie Ortega

    Ernie Ortega

    Chief Executive Officer

    Ernie Ortega is GTT’s chief executive officer (CEO). In this role, Mr. Ortega is responsible for leading the company’s drive to operational excellence and outstanding client experience for GTT’s enterprise, channel, carrier and government clients, as well as overseeing the sales organization. Mr. Ortega brings over 30 years of telecom experience to GTT with a strong record of delivering revenue growth at major companies, including MCI, XO, Cogent and Colt. He has held various C-level roles with leading organizations with responsibility for $400 million to $1.7 billion in revenue. Mr. Ortega was most recently CEO of Towerstream. He has also held the chief revenue officer position at Colt Technology Services, where he had global responsibility for sales, marketing, operations and sales engineering spanning three continents. Before joining Colt, Mr. Ortega was chief revenue officer at Cogent, and prior to that he spent 14 years at XO Communications in leadership positions, including executive vice president of sales and marketing, responsible for the growth of XO’s revenue stream. Mr. Ortega started his career in the telecommunications industry at MCI in various senior management roles.

  • Donna Granato

    Donna Granato

    Chief Financial Officer

    Donna Granato is GTT’s chief financial officer (CFO), leading GTT’s global finance group, including financial operations, external reporting, investor relations, mergers and acquisitions and all banking and advisory relationships. Ms. Granato joined GTT in June 2020.  Ms Granato has held financial and operational roles of increasing responsibility in such areas as investor relations, corporate finance and mergers and acquisitions. She has deep media and communications experience, having worked at CBS, Viacom, Tribune Company, Interpublic Group, MDC Partners and Omnicom. She also spent two years as a media investment banker at Salomon Smith Barney. Ms. Granato is a certified public accountant. She graduated from Rider University's undergraduate accounting program and earned an MBA from New York University.

  • Don MacNeil

    Don MacNeil

    Chief Operating Officer

    Don MacNeil is GTT’s chief operating officer (COO) responsible for leading GTT’s network operations, service delivery, assurance and vendor management teams, as well as GTT’s product organization. Mr. MacNeil has a track record of delivering successful organizational change and operational improvement for national, international and global businesses. Prior to joining GTT, Mr. MacNeil was CEO at FiberLight, after having served as COO, driving its business of designing, building and optimizing fiber-optic networks. He has held several executive leadership roles over his career including COO, CMO and head of customer operations for managed network provider XO Communications. Mr. MacNeil also served as chief technology officer (CTO) for EdgeConneX, a global data center solutions provider. Mr. MacNeil graduated from the United States Naval Academy, Annapolis, with a Bachelor of Science degree in naval architecture. He went on to serve 27 years in the U.S. Navy, both on active and reserve assignments, attaining the rank of captain. He holds an MBA from the College of William and Mary, Williamsburg, VA, and a Master of Science Physics from the Naval Postgraduate School, Monterey, CA.

  • Lisa Brown

    Lisa Brown

    Chief Marketing Officer & Chief of Staff for the Executive Office

    Lisa Brown is GTT’s chief marketing officer (CMO) and chief of staff for the executive office. In her role, Ms. Brown is responsible for leading the sales enablement, corporate marketing, and client experience functions. As chief of staff, her responsibility is to manage the CEO transformation agenda facilitating the successful implementation of key initiatives across GTT in support of the company’s business objectives. Ms. Brown joined GTT in October 2015 and has worked in a number of executive roles aligned to the CRO office, most recently as SVP sales operations. Ms. Brown brings over 20 years of industry experience to the role and has held  leadership positions in the telecommunications, data center, and public cloud sectors.  She was formerly vice president marketing and sales operations at both Broadwing Communications and Active Power. While at Broadwing she also served as general manager and vice president customer operations. Ms. Brown received a bachelor’s degree in Finance from Bloomsburg University. 

  • Frederique Arnold

    Frederique Arnold

    Senior Vice President, Human Resources

    Frederique Arnold is GTT’s senior vice president, human resources. In this role, she leads HR for GTT, overseeing performance management, compensation planning and talent recruitment, as well as HR support for acquisitions, organizational restructuring and change. Ms. Arnold brings 20 years of human resources experience at international companies in the high-technology industry working for high-growth, rapidly changing organizations. Prior to joining GTT in 2018, Ms. Arnold was the senior vice president of human resources at Interoute. She joined Interoute in 2006 as the director of Global Compensation and Benefits and subsequently held a number of leadership roles in the human resources function. Before joining Interoute, Ms. Arnold held several leadership positions at Mentor Graphics, where she specialized in executive and general compensation, mergers and acquisitions, benefits, performance management and employee relations. Ms. Arnold holds a M.Sc. in economics from Louis Pasteur University in Strasbourg, France, and an M.A. in human resources from the University of Law, Economics and Political Science in Dijon, France. 

  • Dave Salustri

    Dave Salustri

    President, Americas Division

    Dave Salustri is GTT president, Americas Division overseeing key functions in the Americas region that include client success, sales, sales engineering, quoting, ordering, professional services, and overall client account management. Mr. Salustri brings more than 30 years of sales and marketing leadership experience in the telecommunications industry to the role. Prior to GTT, Mr. Salustri held executive roles at Time Warner Telecom and XO Communications. His executive responsibilities included sales strategy and performance, customer retention, sales engineering and management, marketing strategy and execution.  Following the acquisition of XO Communications by Verizon, Mr. Salustri was appointed vice president of sales for Verizon Business Markets. Mr. Salustri started his career at New York Telephone and also held sales management positions at Teleport Communications, Metropolitan Fiber Systems, and WinStar.

  • Tom Homer

    Tom Homer

    President, Europe Division

    Tom Homer is GTT president, Europe Division overseeing key functions in the Europe region that include client success, sales, sales engineering, quoting, ordering, professional services, and overall client account management. Mr. Homer brings to GTT over 25 years’ experience as a telecommunications industry executive. Before joining GTT in 2020, Mr. Homer was Chief Customer Officer at LaserLight, responsible for sales, product management, marketing and customer experience. Previously, Mr. Homer held executive roles at Telstra and Global Cloud Exchange. At Telstra, Mr. Homer was Managing Director, EMEA responsible for developing and executing strategy across the region. During his tenure, Mr. Homer doubled the size of the EMEA business and was global sponsor of the Customer Advocacy program. Mr. Homer served as Managing Director, UK & Nordics at Global Cloud Exchange from 2009 to 2011. Earlier in his career, Mr. Homer held senior sales leadership and management positions at Cable & Wireless and AT&T.

  • Douglass Maynard

    Douglass Maynard

    General Counsel

    Douglass Maynard is GTT’s general counsel responsible for all of the company’s legal matters. Mr. Maynard has over 30 years of legal experience as a practicing attorney, federal prosecutor and in-house counsel. Prior to joining GTT, he served as general counsel for Akin Gump Strauss Hauer & Feld LLP, a major international law firm. Mr. Maynard served as Deputy Commissioner for Legal Matters at the New York City Police Department. Earlier in this career, Mr. Maynard served as Assistant United States Attorney, Criminal Division, in the US Attorney’s Office, for the Southern District of New York. He started his career as a litigation associate with Patterson, Belknap, Webb & Tyler LLP. Mr. Maynard received a Bachelor of Arts degree from Yale University and a law degree from New York University School of Law. He serves on the New York City Bar Association Judiciary Committee and is also a member of the Board of Directors of the Ronald McDonald House of the Greater Hudson Valley.

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