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The Sigma leadership team

Tim Spencer

President & CEO

As co-founder, President and CEO, Tim Spencer is responsible for establishing and executing the growth strategy for Sigma. Tim has been responsible for Sigma’s strategic direction and corporate operations since 2003.

In his previous role as Sigma’s Chief Technology Officer, Tim helped turn the company’s early technology vision into reality and along the way transformed Sigma into the leading provider of OSS service management products and services.  Prior to joining Sigma, he held various senior positions with Bell Canada.  He was Director of Software Engineering for advanced services at Bell Mobility, where he was responsible for the design and development of real-time OSS solutions such as message processing, service activation and fulfillment, inventory and network management. Tim also led several international OSS consulting projects for Bell Canada International in Central and Latin America.

Simon Muderack

EVP & Chief Commercial Officer

As the Executive Vice President and Chief Commercial Officer of Sigma, Simon Muderack provides leadership of global sales and marketing for Sigma Systems.  With extensive experience working with Communications Service Providers across the globe in Wireline, Wireless, Wholesale and Cable operations, Simon provides his expertise in running the commercial business for Sigma, further penetrating existing markets while entering into new markets and industries.  Before Sigma, Simon was the founder and CEO of Tribold acquired by Sigma in 2013.

Brian Cappellani

Senior Vice President of Engineering

Brian Cappellani is currently Senior Vice-President of Engineering at Sigma Systems where he provides the technical vision, leadership and long-term direction for all aspects of the software development organization.  He previously served as the company’s Chief Technology Officer, where he was responsible for Sigma’s architectural and technology vision.

A 21-year telecommunications industry veteran, Brian has extensive experience designing and building large-scale operations and business support systems.

Prior to joining Sigma, Brian worked for Accenture in various roles including senior-level architecture, engineering and development management positions, held both internally and within Accenture’s telecommunications practice, focusing on wireless and satellite technologies.

Brian is a highly sought-after speaker on next-generation OSS and software development.

Robert Levine

Chief Financial Officer

For the last two years, Robert has served as the Chief Financial Officer of Sigma Systems. In addition to his time as Sigma, Robert has accumulated vast experience within the investment banking and corporate banking environments with a focus on corporate finance, mergers and acquisitions, strategic and corporate planning, debt raising, IPO, and private equity.

Mark Flynn

Vice President of Global Services

Mark Flynn has been leading Sigma’s Global Operations Team for the past 5 years. He is testament that Sigma grows from within – he started as a Business Analyst and today, as VP of Global Services, supports the great team of people in professional services, technical support, training, Cloud Operations and IT. He has extensive experience in program delivery, operations and customer management. Prior to Sigma, Mark worked with Toys R Us, and AT&T Canada.

Jocelyn Bryce

Vice President of Human Resources

Jocelyn Bryce is the lead of Sigma’s People and Culture programs for the past 6 years and she is very proud of the recent recognition Sigma has received with awards such as as Top SMB Employer In Canada and Deloitte Best Managed company. Jocelyn is a senior human resources executive with over 20 years of experience in Tech organizations working with senior executives and their teams to build their organizations, manage change and develop global talent.

Stephen Krajewski

Vice President of Marketing

Stephen has over 15 years of experience in leading marketing teams for enterprise solutions at Amdocs, Iron Mountain, Thunderhead and Kenan Systems. Stephen has particular expertise in product marketing for high-value software and services for telecommunications providers, as well as demand generation processes and leadership.

Santosh Honnagunti

Country Head & COO, Pune

Santosh serves as Sigma’s Country Head and Chief Operations Officer in Pune, India. A previous Wipro and Ericsson executive, Santosh has over 18 years of extensive experience in the communications OSS/BSS/SDP domains.  Santosh has extensive experience working with CSPs in Europe, Middle East, APAC, South Africa and US with leadership roles and experience in presales, sales, heading practices, solutions, delivery and managed services.

Jeff Haar

General Counsel and Compliance Lead

Jeffrey Haar is a legal and business executive with more than twenty years of experience across multiple industries and disciplines. He has extensive experience in corporate and commercial law, as well as corporate finance and M&A, for both private-sector and public-sector companies. As general counsel at Sigma Systems, he oversees all legal functions, encompassing commercial contracts, corporate governance, intellectual property, litigation, human resources and real estate.

Jeffrey started his legal career in New York and has worked on transactions globally. He previously worked at Postmedia Network, Brookfield Asset Management and Architel Systems Corporation.

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