Team of professional leaders with vast experience in the marketing industry.


Darrin Rayner, Executive Vice President

Darrin Rayner is responsible for leading Xpressdocs’ sales and business development activities, including enterprise sales, channel development, partnership management, account management, call center operations and customer service. In addition, Darrin develops and executes Xpressdocs’ long-term product and platform vision, creating industry-leading solutions to meet the needs of our clients.

Prior to joining Xpressdocs, Darrin served as Vice President for Verizon’s Superpages.com business unit, including roles in Sales, Client Services and Internet Marketing. In his most recent role with Verizon, Darrin was responsible for creating, implementing and leading the sales channel strategies to expand the advertiser base for the company’s local search site. By employing a multi-channel approach that included the creation of internal telephone and premise sales channels, partnerships with national agencies, establishment of local resellers, integration with global telemarketing firms and launch of an online ad sales platform, Darrin was able to lead a diverse team that grew to $160M+ in less than three years. Darrin has also held senior positions in the advertising and interactive entertainment software industries in the United States and Canada.

Darrin has a BA in Business Administration from Simon Fraser University, with concentrations in Marketing, Communications and Human Resource Management.

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Siva Kalavagunta, Chief Technology Officer

Siva Kalavagunta is responsible for the Xpressdocs technology platform development, Architecture, IT operations and infrastructure. In addition, Siva leads UX/UI team that innovates and implements new features to enhance user experience. 

Siva is an accomplished leader and engineer with more than 18 years of Web technology and product development experience. He has launched multiple innovative products and has deep expertise in product management, engineering, agile development and quality.

Before joining Xpressdocs, Siva served as Vice President at Angies List where he led development of ecommerce platform and mobile development. Siva held multiple leadership roles in Sabre where he led the development of Airline reservations, operations and customer loyalty products. Prior to Sabre, Siva was with Verizon where he built order fulfillment, claim management and call center applications. He played a key role in integrating MCI and Verizon enterprise billing portals.

Siva holds a Master’s Degree in business administration from Southern Methodist University and Master’s in computer applications from Osmania University, India.

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