Global Leadership

John Hollingsworth

Chief Executive Officer, Global

After initially joining Stellar in November of 1998 as the head of Business Development, John Hollingsworth was appointed Global CEO in July 2010. Prior to this appointment he held the position of Chief Executive Officer of Stellar Asia Pacific, dedicating himself to identifying innovative services and solutions to meet the ever changing needs of our clients and their customers. 

Before joining Stellar John brought to the table over a decade of operations experience gained primarily in the telecommunications and utilities sectors

Melissa Hamilton

Chief Executive Officer, Asia Pacific

Melissa joined Stellar in 1999.  As a key executive in the Stellar team since start up in this market, Melissa has been instrumental in the rapid growth to market leader in this region.  As a contact center professional, Melissa has over 20 years' experience acting as a trusted advisor to clients in customer contact management strategy across multiple industries including telecommunications, utilities, travel & transport and government. Melissa has extensive onshore and offshore experience with more than 3,000 employees across the region.

Melissa's passion is building an ownership culture, investing significant time building a business literate team who know how to deliver stunning results. The company then shares more than 40% of profits directly with employees via monthly bonuses. Melissa is passionate about delivering results that improve customer satisfaction.

Michael Lumsden

Chief Executive Officer, Europe

In January 2012 Michael Lumsden was appointed CEO of Stellar Europe, a new arm that signals an expanded geographic mandate for Stellar and recognizes the growing market demand for pan European services.

Michael has over 25 years of experience in senior roles in sales, product management and client management. He has a successful track record in business development and client management in complex long term relationships across banking, telecommunications and FMCG. His leadership in various strategic initiatives and programmes include mergers, acquisitions and divestments.

Staci Tubbs

Chief Executive Officer, North America

Staci has 17 years in the business process outsourcing industry with extensive experience in global operations, strategy, management, integration and sales. Staci has supported clients in telecommunications, consumer electronics, travel and transportation, retail and government in the US and abroad.

Prior to re-joining Stellar in 2011 as Vice President of Sales and Strategy, Staci spent a number of years growing existing accounts in both sales and operational roles. Notably, she was a Regional Operations VP with ownership for a single account that grew over 40 percent in two years ultimately supporting 7,000 front line agents. She was part of the original team that supported Stellar’s launch working in Australia from 1999 to 2002.

Staci graduated from Cornell University with a Bachelor of Science degree.   

Steve Bigari

Chief Executive Officer, Stellar Restaurant Solutions

Steve Bigari  is Stellar Restaurant Solutions’ inaugural CEO, beginning when the company was launched in October 2007. Steve is in the top 5% of all consultants in the restaurant industry with the GLG (Gerson Lehrman Group) of 150,000 consultants. In 2006, he was recognized as "Colorado Springs Business Citizen of the Year" and has successfully started 14 companies as well as owning 3 industry patents.

As a McDonald's franchise operator for 19 years, Steve was integral in innovating new concepts such as credit and debit card acceptance at Quick Service Restaurants (QSRs) and the Made For You service delivery model. During this time he was also chairman of the McDonald's innovation team. Steve grew his McDonald's business franchise from US$1.5 million to US$20 million in just 12 years.

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