Leadership Team

John Doyle


John is chief executive officer at Castlight. During 2016, John served as president and chief operating officer of Castlight. He joined the company in 2012 as its chief financial officer. John joined Castlight after more than 20 years primarily in the biotechnology industry where he had most recently been the chief operating officer at Achaogen, a publicly-held firm focused on the development of antibiotics. John holds an MBA from the University of California, Berkeley, and received his undergraduate degree from California Polytechnic State University, San Luis Obispo. He is a member of the 2012 Class of Henry Crown Fellows at the Aspen Institute and serves on the Achaogen board of directors.

Jennifer W. Chaloemtiarana

General Counsel and Chief Compliance Officer

Jennifer Chaloemtiarana leads the compliance function of Castlight as its general counsel and chief compliance officer. Previously, she was a chief counsel at Levi Strauss & Co., where she provided guidance and support for sales and consumer relations’ practices, as well as financing transactions, securities compliance, and corporate governance activities. Prior to that she was Associate General Counsel at Netflix, Inc. with a similar range of responsibilities, during a period of rapid growth. Chaloemtiarana is a member of the board of OneJustice, a civil legal aid nonprofit serving poor Californians. She has a JD from the University of Michigan Law School and a bachelor of science degree from Cornell University.

Siobhan Nolan Mangini

Chief Financial Officer

Siobhan is responsible for finance, investor relations, facilities, and business operations. Prior to joining Castlight Siobhan worked at Bain & Company, specializing in the health care and private equity practices. Siobhan began her career at the Kaiser Family Foundation as an investor responsible for managing the foundation’s endowment. Siobhan has an MBA from Stanford Graduate School of Business, MPA from the Harvard Kennedy School of Government and a BS from the Wharton School at the University of Pennsylvania.

Vicki Ryan

Chief People Officer

Vicki Ryan is responsible for leading all aspects of human resources as chief people officer at Castlight Health, including talent management, compensation and benefits, training and development, change management, and employee engagement. She has held senior HR executive positions, both domestically and internationally, and at successful high-growth technology and services organizations, ranging from start-ups to Fortune 150 corporations. Among her past leadership roles, Vicki served as chief people officer at Jive Software, global vice president of people at LumaSense Technologies, vice president of people for Mercury Interactive, which was acquired by HP. Vicki holds a bachelor of science in business from San Jose State University.

Maeve O'Meara

Executive Vice President, Product and Customer Experience

Maeve is responsible for our Product Management, User Experience and Design, User Engagement, Product Analytics, and Program Management teams. Previously, Maeve was a venture capital investor at Highland Capital Partners, where she focused on investments in healthcare IT and services and the consumer internet markets. Maeve began her career at Bain & Company, where she specialized in healthcare provider and consumer strategy. Maeve also spent time at Generation Health, where she led original product design and development. Maeve has an MBA from Stanford Graduate School of Business and a BA from the University of Virginia.

Neeraj Gupta

Executive Vice President, Engineering

Neeraj is a long-time technologist and leads engineering at Castlight. Before joining Castlight, Neeraj was SVP, Product and Engineering at Apcera, an industry leader for providing a secure and policy driven trusted cloud platform. Prior to Apcera, Neeraj was SVP, Product and Engineering at Appcelerator, an enterprise mobile, analytics and cloud platform company. Prior to Appcelerator, he held various leadership roles at Particle Code, Spike Source and Oracle and technical roles at Informix and other companies. He earned a bachelor's degree in Computer Science from I.E.T. India and a master's degree in business administration from Haas School of Business, UC Berkeley.

Mike Leonard

Chief Commercial Officer

Mike is responsible for leading Castlight's commercial go-to-market teams, including sales, marketing, commercial relationships, and business growth. Mike joined Castlight through the recent acquisition of Jiff where he was Executive Vice President of Sales & Marketing. Prior to Jiff, Mike was a Vice President of Sales at NICE Systems, where he oversaw major account sales for customer and employee experience. Mike joined NICE through the acquisition of Merced Systems. As the first member of the Merced sales team, Mike helped build Merced from a single product company to a multi-solution global organization. Across his career, Mike has held various sales and consulting roles in high growth venture backed software firms, and holds a Bachelors of Mechanical Engineering from Lehigh University.

Kristin Torres Mowat

Senior Vice President, Corporate Development

Kristin leads Castlight’s efforts to support growth through our company strategy, strategic partnerships, and inorganic opportunities. She leads the identification, evaluation, execution, and integration of these opportunities together with our portfolio of medical, pharmacy, dental, and behavioral health plan relationships. Previously, Kristin was vice president at DaVita Inc., a Fortune 500 and one of the largest national healthcare providers. She was responsible for corporate strategy, Falcon EHR (electronic health records business), and recruiting for the Redwoods Leadership Development Program. She co-led due diligence in DaVita’s $4.4B merger with HealthCare Partners. Kristin earned her bachelors in international relations and minor in human biology from Stanford University. After a consulting career at Bain & Co. and The Bridgespan Group, Kristin worked at Chiron Corporation before returning to Stanford to earn her MBA and JD. She serves on the Bay Area Executive Board of Spark, a non-profit engaging at-risk youth to become motivated learners and connected community members.

Pierce Graham-Jones

Senior Vice President, Growth

Pierce is responsible for driving Castlight’s growth, leading teams in product marketing, corporate marketing, business development, demand generation, account development, revenue operations and marketing design. Pierce joined Castlight through the strategic acquisition of Jiff, where he was the VP of Growth. As Jiff’s first business hire, he helped grow the company into a market-leading health benefit platform. Before that, he shaped digital health efforts at the US Department of Health and Human Services, where he was recognized by Forbes as one of “30 Under 30 Healthcare Leaders Changing the World.” He spent the first five years of his career as a management consultant for the Monitor Group. Pierce earned his bachelor’s degree from Middlebury College in Vermont.