About Us

What is Propeller Health?

Propeller Health TeamPropeller is the leading mobile platform for respiratory health management. Through sensors, mobile apps and services, Propeller helps reduce the cost of care while delivering better quality of life for individuals with chronic respiratory disease. Backed by Safeguard ScientificsThe Social+Capital Partnership, California HealthCare Foundation and other investors, Propeller Health is now working with organizations like Dignity Health, Wyckoff Heights Medical Center, Amerigroup Florida and the City of Louisville. Company recognition includes TEDMED Innovation Showcase, White House Champion of Change and Bluetooth Breakthrough Product awards. The system has been featured in The Economist, Washington Post, Fast Company, Wired and Scientific American.


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Dr. Jim Golden, Chief Management Scientist, Partner, Global Healthcare Data Analytics Group, Accenture
Dr. David Mannino, MD, Professor and Chair, Department of Preventive Medicine and Environment, University of Kentucky
Michelle Snyder, Chief Marketing Officer, Welltok

Propeller crew

Our business is growing quickly and we’re expanding our team. We’d love to have you join us. Please check out our list of current openings.


David Van Sickle, CEO and Co-Founder

David was formerly an Epidemic Intelligence Service Officer with the Centers for Disease Control and Prevention, and a Robert Wood Johnson Foundation Health and Society Scholar at the University of Wisconsin School of Medicine and Public Health. He writes about asthma epidemiology, medical anthropology, and global chronic respiratory disease at davidvansickle.com.


Greg Tracy, CTO and Co-Founder

Greg is a technology enthusiast who excels at applying technology in new domains with the potential for large scale. He balances the big vision of how software technology can improve our lives with being an advocate for customers still living in the present. He has a Masters in Computer Science from the University of Wisconsin – Madison. He previously ran the engineering team at Emageon, a medical imaging company. You can also follow him on Twitter at @gregtracy.


Mark Gehring, Co-Founder

Mark has previously co-founded and served as CEO of three companies: Geometrics, developer of a 3D radiation treatment planning system that has been the market leader since 1996 (now marketed by Philips); UltraVisual, a medical imaging company which merged with Emageon, reached $100 million in sales, and went public in 2005; and Sharendipity, a software development environment for non-programmers.


Chris Hogg, Chief Operating Officer

Chris is a digital health advocate interested in how new forms of health data are changing the relationship between physician and patient. As COO, he leads the company’s San Francisco office with an emphasis on product, data and implementation. Prior to Propeller Health he co-founded 100Plus, a mobile health company using personalized analytics to promote healthy behaviors, which was acquired by Practice Fusion in 2013. At Practice Fusion he built a data science group that created data products leveraging the company’s 80+ million patient clinical database. Prior to 100Plus Chris led the Cardiovascular Commercial Strategy group at Gilead Sciences. Chris holds a Degree in Molecular and Cell Biology from Brown University and an MBA from The University of Chicago.


David Hubanks, Vice President of Operations

David’s passion is in building products. He built integrated circuits for 17 years at IBM and ZMDI working as designer, design center manager and product manager. He has EMBA, Electrical Engineering and Computer Science degrees from the University of Wisconsin – Madison.  Beyond work, he enjoys 5am bike rides (when he’s not attacked by birds), cross-country skiing and making Sunday morning pancakes for the next generation of engineers (he hopes).


Meredith Barrett, Vice President of Science and Research

Meredith is passionate about using technology to better understand the intersection of health and the environment. She was a Robert Wood Johnson Foundation Health & Society Scholar at the University of California Berkeley School of Public Health and UC San Francisco Center for Health and Community, where she first began collaborating with Propeller Health. She completed her PhD in Ecology at Duke University, where she was a National Science Foundation Graduate Research Fellow and chased lemurs for a living. Beyond work, she loves traveling, running and spending as much time outside as possible.


Olivier Humblet, Vice President of Data and Analytics

Olivier Humblet is a data scientist who is passionate about combining technology with data analytics to improve health. He was a Robert Wood Johnson Foundation Health & Society Scholar at the University of California Berkeley School of Public Health and UC San Francisco Center for Health and Community, and completed his doctorate in Epidemiology and Environmental Health at the Harvard School of Public Health.


Erika O’Donohoe, Director of Client Services and Support

A Madison Wisconsin native, Erika has been working one on one with customers in the medical software space for over a decade. A graduate of the University of Wisconsin – Madison for both her Undergraduate degree and MBA she enjoys making her mark in early stage companies. Her real passion in life is starting and abandoning multitudes of Pinterest projects.

Amy Cummings, Vice President of Client Development

Amy is passionate about both the business and practice of healthcare, having held both clinical and executive roles in the industry. As a nurse, she thrives working with clients on creative solutions to help minimize their care challenges. Prior to joining Propeller, Amy was the National Business Development Director for Accretive Health. She’s also worked in home healthcare, pharmaceuticals, physician advisory services and healthcare consulting with GE Healthcare. Amy holds a Masters in Nursing Administration and MBA from the University of Iowa. On the home front, she loves spending time with her two sons, doing Crossfit and living life to the fullest.


Kevin Houlihan, Director of Customer Experience

With a BS in Mechanical Engineering and an MBA, both from the University of Wisconsin – Madison, Kevin has spent years designing and building technical software. He is passionate about the usability and design of software and that user experience is key to the effectiveness of software solutions. Outside of work, Kevin loves competitive alpine ski racing and has been involved with coaching and coordinating college racing and the UW Alpine Team for a decade.


Chris Yu, Vice President of Client Services and Implementation

Chris is a digital health geek and has spent his entire career at the intersection of health care, public health, and information technology. He oversees Propeller’s Client Services and Implementation team and focuses on user growth and customer success. Prior to Propeller, Chris was with Merck’s Medical Information and Innovation division focusing on “big data” projects, and previously held leadership positions at Voxiva, a market leading mobile health company, and ZixCorp, a secure messaging and e-prescribing provider. Chris has a Bachelors in Biochemistry from the University of Wisconsin – Madison and a Masters in Health Policy and Management from Columbia University. Beyond work, traveling, being outdoors, and Brazilian Jiu Jitsu are major passions.


Eric Hoffman, Mechanical/Electrical Engineer

Eric tries real hard to keep one step ahead of the “young whipper snappers” he helps train as an instructor at UW Electrical Engineering Dept. With 10 years at Intel, 7 at ZMDI, and 5 as an independent consultant & instructor at the UW, Eric definitely has a mastery of obsolete technologies. He spends many of his evenings in his basement laboratory building prototypes of what should be the “next big thing”.


Ben Kopp, Software Developer

Ben is one of those young whipper snappers trained by Eric Hoffman while studying computer engineering as an undergrad at the University of Wisconsin – Madison. After graduating with an MS in Electrical Engineering in 2007, Ben worked at ZMDI for 6 years where he developed an expertise in sensors and sensing technology.  At home, he is trying his best to raise two future Badger football players.


Ian Alderman, Software Engineer

Ian is an experienced distributed systems software developer, passionate about helping people (and computers) make big data useful for human health. Working with the HTCondor project and focusing on secure distributed task management, he earned a Ph.D. in Computer Sciences at the University of Wisconsin – Madison. More recently, he spent 5 years at Cycle Computing, where he was a Solutions Architect helping customers use HPC in the cloud. On earth, he plays dobro and guitar in a bluegrass band.


John Kalmi, Software Engineer

John is a recent University of Wisconsin – Madison graduate where he majored in Computer Engineering. He is passionate about making mobile software easy to use and brings that enthusiasm to the Propeller Health mobile apps. Outside of work, he enjoys running, reading, and organizing Taco Tuesdays.

Mike Lohmeier, Software Engineer

Mike is an internet of things software veteran after working in the RFID field for over 5 years. He helped build products that tracked high-value items and processed millions of sensors events. He also was part of a movement to make RFID more accessible to non-electrical or RF engineers by bringing RFID to the cloud. Mike has also worked with some of the biggest names in travel and social networking software. When not learning every byte of the latest software platform, Mike is usually out biking, kayaking (on a tandem) or playing basketball.


Sam Koblenski, Software Engineer

Sam has an insatiable curiosity for knowing how things work and making things work better, especially when it’s software. Coupled with a Masters in Electrical and Computer Engineering from the University of Wisconsin – Madison and over a decade of experience designing for a wide range of sensors, he brings plenty of know-how to the sensor design team at Propeller Health. In his free time Sam enjoys reading, writing on his blog and playing Lego video games with his kids.


River Karl, Software Engineer

River is an Electrical Engineering graduate from the University of Wisconsin – Madison with an interest in using web technologies to deliver awesome experiences to users of any device. He loves working on projects that aim for the moon and enjoys creating products that exceed users’ expectations. Outside of work River enjoys running, cycling, gymnastics and anything involving a lake.


Justin Krosschell, Hardware Engineer

Justin doesn’t have money. But what he does have are a very particular set of skills; skills that he has acquired over a very short career. Skills that make him an awesome hardware design engineer. If you let his design go now, that’ll be the end of it. It will just work, but if it doesn’t, he will not sleep until it does.


Antara Aiama, Account Manager

All things related to healthcare absolutely intrigue Antara. Most recently, she ran the pay-for-performance and HEDIS programs for one of California’s largest Medicaid managed care health plans. Her experiences also include implementing inpatient EMRs across the country and developing a preventive care program in India. Antara received her Undergraduate from UC Berkeley and a MPH from the University of Michigan. When her mind isn’t preoccupied in healthcare thoughts, she enjoys yoga, exploring new trails and attempting to surf.


Meaghan Watson, Account Manager

Meaghan has found her niche at Propeller Health thanks to her passion for patient care and strong desire to assist in the improvement of people’s quality of life. A University of Wisconsin – Madison graduate, Meaghan has used her deep interest in asthma and COPD management taking a role as Account Manager at Propeller Health, where she enjoys cultivating and growing customer relationships. Having grown up on a lake, Meaghan is most at home near the water. She also enjoys running, tennis and cooking in her spare time.

Jesika Riley, Clinical Research Coordinator

Jesika has been a Clinical Research Coordinator for 12 years working mainly with prescription medications and medical devices. Her favorite things are spending time with her husband and daughter, shopping and using emojis.



Ruby Valadez, Client Services Specialist

Ruby is a graduate from the University of Wisconsin – Madison with a double major in Psychology and Neurobiology. With a diverse background in neurological research, wildlife conservancy, patient care experience, and Spanish fluency, Ruby now works with the Implementation team for Propeller Health but enjoys the equally diverse roles she is able to participate in with this growing and exciting company. In her free time, Ruby enjoys creating art, catching up on her reading and the latest movies, and visiting her beautiful baby niece.


Melissa Williams, Program Coordinator

Melissa has a love for education and healthcare. She graduated with a degree in Respiratory Therapy and Healthcare Administration from the University of Southern Indiana. In her free time she loves spending time with her husband and two small boys playing outside and going for walks. She is an avid sports fan, loves playing volleyball, and watching IU basketball.


Leah Morrell, RQA Engineer

Leah is a biomedical engineering graduate from Washington University in St. Louis. She works with the Propeller hardware team to bring quality product through manufacturing to end users. Leah enjoys creating test fixtures out of materials stolen from the office kitchen and wandering Ace Hardware in search of supplies. In her free time, I cook for a hyper-allergic husband who dislikes potatoes, struggle to keep one potted plant alive and browse St. Louis Stray Rescue’s website looking at puppies.


Amber Markey, RQA Engineer

Amber is a mechanical engineering graduate from the University of Kansas. Before joining Propeller Health, she aided hospital IT staff in debugging and maintaining electronic health record software as a Technical Services representative at Epic. She moonlights by racing bikes in Stage Races such as North Star Gran Prix, weekend XC mountain bike races, and gets rowdy at local cyclocross events. According to her five roommates, she makes the best pancakes since IHOP. When not training or working, her German shepherd Kaiya puts her to work tossing the frisbee.


Charles Donaldson, RQA Engineer

Charles recently graduated with a Master’s Degree in Biomedical Engineering from UW-Madison where he also received a BS in Biomedical Engineering. He has worked with software verification and medical devices on and off for the past 3 years at Ikaria before joining the Propeller crew. In his spare time, he likes playing ultimate frisbee or basketball, fishing on the Madison lakes and cheering on the local Wisconsin sports teams.


Taylor Mahan-Rudolph, Lead Design Controls Engineer

Taylor is a recent graduate from the University of Wisconsin – Madison where she studied Art History and European Studies. With a diverse background in museum work, publishing and radio, she now works in Quality and Regulatory Affairs at Propeller Health. In her free time, Taylor enjoys looking at art, biking and traveling as much as possible.


Lauren Flegel, Office Coordinator

Lauren recently graduated from the University of Wisconsin Madison in December of 2014 and received a degree in Human Development and Family Studies. She has always been passionate about helping others, and loves to put a smile on everyone’s face. She originally hails from the frozen tundra, also known as Green Bay, WI. In her free time she enjoys doing yoga, reading autobiographies, and spending time with her family.