Announcement: SOA congratulates the new ASAs and CERAs for May 2022.

Moderator and Presenter Information

Brandon Barber
Principal Data Scientist
Valence Health

Brandon Barber, Principal Data Scientist, joined Valence Health in 2009 and has since served across all Valence Health’s business lines in some shape or form. He currently leads the organization’s research and development team by devising new analytics solutions and conducting research efforts to identify previously unrecognized data insights. His expertise with big data, population health, actuarial services, risk-adjustment and predictive modeling applications in healthcare provide invaluable experience for his present role. When Barber isn’t writing algorithms at work, he’s writing algorithms at home for his own interests in the healthcare and finance sectors.

Alberto Cairo
Knight Chair, Visual Journalism
University of Miami

Alberto Cairo is the Knight Chair in Visual Journalism at the University of Miami, where he teaches infographics and data visualization. He worked for newspapers and magazines for twenty years, and has published two books, The Functional Art: An Introduction to Information Graphics and Visualization (2012) and The Truthful Art: Data, Charts, and Maps for Communication (2016). His website is and his Twitter handle is @albertocairo.

Gabriela Dieguez, FSA, MAAA
Principal & Consulting Actuary
Milliman Inc

Gabriela Dieguez is a principal and consulting actuary with the New York office of Milliman. Dieguez has provided actuarial and consulting services to a wide range of clients, including commercial insurers, Medicare Advantage organizations, pharmaceutical companies, Blue Cross/Blue Shield plans, HMOs and healthcare providers. She has extensive experience in pricing and valuation, analyzing benefit utilization, forecasting trends and performing claims analytics for particular disease states. 

Dieguez has advised pharmaceutical companies and other clients on actuarial topics related to health care reform, Medicare Advantage and Part D, risk sharing contracting and payer economic issues. In addition, her consulting with both plan sponsors and providers has included Medicare bid certifications, rate development and benefit design, medical claim liabilities evaluation, actuarial support for mergers and acquisitions and financial feasibility analysis. 

Prior to joining Milliman, Dieguez worked for a consulting firm where she was involved in rate and reserve calculations, financial projections, profitability analysis, reinsurance contracts analysis, product development, and rate adequacy.

Jeremy Engdahl-Johnson
Director of Media Relations and Public Affairs
Milliman, Inc.

Jeremy Engdahl-Johnson manages Milliman, Inc.’s relationship with the media and oversees the firm’s editorial, social media and public affairs operations. This includes managing the expression of Milliman, Inc.’s intellectual capital, opening up new communication channels as technology evolves, and protecting the firm’s reputation and independence.

He helps consultants make actuarial and technical concepts understandable to a wider business audience by translating their expertise into effective business messages. He offers counsel to consultants as they navigate complex political and reputational environments, especially when performing work of societal importance.

Engdahl-Johnson has developed a unique social media strategy for Milliman, Inc. that allows consultants to derive maximum business value from Twitter, LinkedIn, Google+ and other platforms while minimizing risk.

He has been helping technical professionals accomplish their communication and public relations goals since 1999. He joined Milliman, Inc. in 2004 and built the firm’s editorial operation, and in 2008 began adapting the media relations operation to take advantage of the changing media landscape.

Engdahl-Johnson has helped consultants publish hundreds of articles, blogs and research reports, and has assisted on the creation of several actuarial textbooks. With one foot in the digital realm and the other in the world of print, his expertise encompasses old, new, and emerging media.

His journalism has appeared in

  • High Country News
  • The Health Care Blog
  • Northwest Runner
  • Seattle Weekly

His fiction has appeared in Spitball and Writers Billboard.

When he is not helping translate from actuarial to English, he moonlights as a screenwriting instructor and podcaster with the New York Screenwriters Collective.

Hans K. Leida, FSA, MAAA, Ph.D.
Consulting Actuary, Principal
Milliman, Inc.

Hans Leida is a principal and consulting actuary with the Minneapolis office of Milliman, Inc. He joined the firm in 2006. Leida works in health insurance. He has consulted to insurance companies, Blue Cross Blue Shield plans, HMOs, government health programs and employers. Recently, he has been working on individual and small group health insurance rate filings under the Affordable Care Act’s health care reforms. Leida is frequently quoted in the media on healthcare reform in publications such as The Wall Street Journal, Reuters, Bloomberg Businessweek and Modern Healthcare.

Leida has completed many projects involving individual and group health strategy, pricing and rate filings. In 2007, he co-authored a paper for America’s Health Insurance Plans (AHIP) on the impact of guaranteed issue and community rating laws adopted by certain states in the 1990s. That paper (which was updated in 2012) has been widely cited with the advent of federal healthcare reform, most notably by the Chief Justice of the U.S. Supreme Court in his majority opinion for the case upholding premium subsidies in federal exchange states (King v. Burwell). More recently, Leida co-authored the second edition of Individual Health Insurance. The first edition of this textbook has been on the Society of Actuaries’ exam syllabus for many years.

Leida also has significant experience with risk adjustment and predictive modeling of health care costs. He was the lead developer of the prescription-drug-based risk adjuster included in the Milliman Advanced Risk Adjusters (MARA) software product. He has also performed firm-level research on the federal ACA risk adjustment model that took effect in 2014.

Leida also works with Medicare Advantage and Medicare Supplement plans.

Prior to joining the firm, Leida taught mathematics while pursuing his Ph.D. He also performed research and co-authored a book with the support of a grant from the National Science Foundation.

Randy Olson, Ph. D.
Artificial Intelligence Researcher
University of Pennsylvania

Randy Olson is an artificial intelligence researcher at the University of Pennsylvania Institute for Biomedical Informatics, where he develops state-of-the-art machine learning algorithms to solve biomedical problems. Olson specializes in artificial intelligence, machine learning and data visualization, although he’s always learning something new to make myself more useful to his clients and collaborators. He regularly writes about his latest work on his personal blog, where he’s become known for computing optimal road trips around the world and solving Where’s Waldo?, among many other creative applications of machine intelligence. He works tirelessly to promote open and reproducible science, leading by example and openly publishing his work on GitHub and open access journals. He’s also passionate about training the next generation of data scientists to be more efficient, effective and collaborative in their work. He does so by writing online tutorials, teaching hands-on workshops and mentoring local students in his research specialties.

Sheamus Kee Parkes, FSA, MAAA
Milliman, Inc.

Sheamus Kee Parkes is a health actuary with the Indianapolis office of Milliman, Inc. He joined the firm in 2005. Parkes has focused heavily on statistical analytics during his time with Milliman, Inc. He has gained a wide range of knowledge of techniques and methods that can be applied to actuarial problems.

Common project themes include:

  • Valuing Interventions via Observational Studies
  • Claim Reserving Methodologies with a focus on estimating Forecast Densities
  • Supervised Machine Learning / Predictive Modeling
  • Insightful Statistical Visualizations
  • Productization of Successful Analytics

Parkes has a large amount of technical skills and a strong understanding of many software applications such as R, Python, SAS, SQL and GitHub.

Jason Robert Siegel, FSA, MAAA

Jason Robert Siegel performs pricing, valuation, and compliance activities for a number of health plans, including several CO-OPs. He is leading the development of firm-wide models to develop rates under the ACA, to estimate financial accruals for new items such as the 3Rs and federal subsidies, and to identify missing diagnoses for purposes of optimizing risk scores. He has advised nationwide issuers and blues organizations on strategies for leveraging the 3Rs, in particular the unintended consequences of the risk adjuster. Siegel has presented to government bodies such as the National Conference of Insurance Legislators and the North Dakota Interim Committee on Healthcare Reform. His research reports have been cited in many sources including Forbes, Healthcare Finance News and Benefits Pro, in addition to several congressional testimonies. He has presented to professional organizations such as the IASA and the SOA.

Technology Evangelist 

Dave Snell is active with the SOA on many section and other activities, and in 2014 he was designated an Outstanding Volunteer. If you are a member of the Predictive Analytics and Futurism section then you know him as the newsletter editor for the last eight years. Prior to his actuarial career though he was editor/publisher/owner of a weekly magazine, and later an engineer and a technical writer who wrote a 3,000 page jet engine overhaul manual (which he no longer has the security clearance to read). Dave has authored or co-authored several chapters of Life Underwriter Training Council (LUTC) textbooks. When he was in the brokerage business, he was the editor of the Redwood Empire Association of Life Underwriters (REALU) newsletter, which won the best in state (California) award for two years running. He wrote the bulk of the boring patent wording for a patent he co-invented involving predictive analytics and machine learning for underwriting; but his preference is to write for readability.