About us

Our Mission, Team & Advisors

Learn more about who we are

Contact us

E: info@paubox.com
P: 415-795-7396

981 Mission Street
San Francisco, CA 94103

Tech Support
E: support@paubox.com
P: 415-795-7396

Our Mission

Email encryption is broken, with too many steps required for users to send and view emails. The result is a vulnerable system open to cyberattacks that costs individuals and companies billions of dollars each year.

We want to secure every email by increasing the adoption of encryption. We do this by putting the user experience first, but not at the expense of security. We want to start with the healthcare industry, which is under attack by hackers who value the personal health information of patients.


Hoala Greevy Founder, CEO
Founder, CEO
Hoala Greevy

Hoala has 17 years experience in the email industry and is architect of the Paubox platform. He graduated from Portland State University with a BS in Geography and a BS in Social Sciences. He likes to go kayak fishing when possible.

Rick Kuwahara CMO
Rick Kuwahara

Rick has over 11 years of sales and marketing management experience. He is an expert at building data-driven, integrated marketing campaigns that drive growth. He graduated from the University of Hawaii at Manoa with a BA in English and a MBA.

Roger Manson Senior Director, Customer Excellence
Senior Director, Customer Excellence
Roger Manson

Roger has served in technical and business roles in Client Services for online payment processing, enterprise software and Internet messaging companies.

Roger has over 20 years’ experience in the high tech industry and has held additional senior level positions with Avatier, Twilio, xMatters, Imanami, Ginix, and Cisco Systems. Roger holds a BSc Information Systems Management from the University of San Francisco.

Phuong Tran Business Development Manager
Business Development Manager
Phuong Tran

Phuong has experience working in various healthcare sectors over the past few years. Due to his experiences, he is well versed in the realm of Healthcare IT.

Phuong received his B.S. in Biological Sciences from UC Irvine and his Masters in Healthcare Policy and Management from Carnegie Mellon University. In his spare time, he enjoys a good road trip and cheering on his Golden State Warriors.

Greg Hoffman Head of Sales
Head of Sales
Greg Hoffman

Greg received his Bachelors degree in Economics from the University of Hawaii at Manoa in 2015. While enrolled, he served two terms as chapter president of Tau Kappa Epsilon, the largest fraternity in America.

Under his leadership, they were awarded the nation’s most improved chapter. Greg’s hobbies include photography, golfing, snowboarding, hiking and traveling.

Shannon Honda Senior Account Executive
Senior Account Executive
Shannon Honda

Shannon was born and raised in Mililani, Hawaii, where he attended the University of Hawaii, majoring in Travel Industry Management. Since moving away from the Islands, he has made a career in the Business Development arena for nearly 20 years.

When he is not working, Shannon is busy with his non-profit work serving as the Vice President/Board Member of the Hawaii Chamber of Commerce of Northern California and on the Executive Committee for the City of Hayward’s Sister City Program (Funabashi, Japan).

Mitch Steckbauer Account Executive
Account Executive
Mitch Steckbauer

Graduated from the University of Arizona in 2014 with a Bachelor of Science degree in Psychology and a minor in Physiology.

He is originally from Los Angeles and prior to working at Paubox, he was a staff accountant at a small CPA firm in Manhattan Beach. When he is not searching for new music and movies, he enjoys snowboarding, golfing, and playing guitar.

Evan Fitzgerald Channel & Distribution Manager
Channel & Distribution Manager
Evan Fitzgerald

Evan graduated from California Polytechnic State University with a bachelor's degree in Economics. After college he moved to the bay area and began working as an EPM consultant implementing budgeting and planning systems. He worked on several end-to-end implementations involving reporting and analytics, driver based budgeting, people planning and subscription based models. In his free time he enjoys playing basketball, golfing and traveling.

Jonathan Greeley Software Engineer
Software Engineer
Jonathan Greeley

Jonathan is a transplant from the rainforest of Washington State and has worked as a full-stack developer since 2011. He graduated from the Evergreen State College with a B.A.Sc. in chemistry and biosystems before discovering a passion for programming.

When he's not coding, he enjoys backpacking with his wife and writing songs on the guitar for his dog.

Renee Char Implementation Support Specialist
Implementation Support Specialist
Renee Char

Renee graduated from Boston University with a BS in Health Science. She has experience working as a hospital administrator and managing patient flow.

In addition to her career in healthcare, she is a Web Developer and has built multiple full stack web applications.

Arianna Etemadieh Inbound Marketing Specialist
Inbound Marketing Specialist
Arianna Etemadieh

Arianna graduated from the University of California, Berkeley with a B.A. in English and marketing experience. Since college, she has pursued marketing in the tech industry where she seamlessly manages all aspects of marketing communications including publications, social media, audio-visual production, and visual content.

When she’s not implementing marketing campaigns, she enjoys cooking, traveling, photography, and volunteering at the Berkeley animal shelter.


Yuka Nagashima
Yuka Nagashima

Originally from Japan, Yuka co-founded 2 tech start-ups in Hawaii. She then directed the State of Hawaii government’s innovation policies as the executive director and CEO of the High Technology Development Corporation, where she implemented innovation initiatives, drafted legislation to enrich Hawaii’s entrepreneurial ecosystem, led their incubation centers and mentoring programs, and advised executive teams of both startups and established companies globally.

Now residing in Silicon Valley, she has acted as an interim executive for startups and advises founders through her consulting firm, Paideia Enterprises. She is currently the President of Astia, a nonprofit that levels the playing field for women entrepreneurs by providing access to capital and networks for the companies they lead. She holds a Bachelor’s Degree in Physics from Reed College.

Denis R. Coleman
Denis R. Coleman

An educator and entrepreneur. He offers guidance to student entrepreneurs around the country, delivering his presentation “Lessons from 15 Silicon Valley Startups – 1979 to 2015” and holding subsequent one-on-one meetings with students.

Coleman has been operating or board level founder of 15 companies, four of which have had IPOs (Symantec, Visoneer, Neoforma, and Financial Engines). He has angel invested in 55 startups – life science, healthcare, and IT. He has earned three engineering degrees from MIT and a Ph.D. in management from Stanford University.

Geoffrey Clapp
Geoffrey Clapp

A health technology expert who has founded several companies, worked on the FDA on mobile health policy, and has dedicated his career to providing clinically relevant improvements to healthcare through technology. Most recently Mr. Clapp founded Better with the Mayo Clinic and the Social Capital partnership, aimed at bringing concierge care direct to consumers.

Prior to his work at Better, Clapp spent more than 12 years redefining the telemedicine and remote patient monitoring markets with Health Hero Network. As COO and CTO he designed and implemented award-winning hardware and software products, including Business Week’s 2000 Product of the Year with unmatched clinical outcomes across millions of patients.

Clapp also serves as an adviser to Rock Health and dozens of other health technology startups.

Dean Levitt
Dean Levitt

Raised on a farm in Knoppieslaagte, South Africa, Dean moved to the United States to be a pursue a career in music eventually finding his way to the tech world. Dean is currently the Chief of Culture of Mad Mimi Email Marketing and a Director of Online Support at GoDaddy.

Eric Nakagawa
Eric Nakagawa

A serial entrepreneur based in San Francisco. He has wide expertise in consumer mobile applications, travel, humor, and user communities. He currently helps mobile developers build better apps at Facebook.

Design & Front-end Development by

Superpencil Superpencil