Our Leadership Team

Shaun Edelstein was raised in South Africa attending the prestigious Stellenbosch University receiving Bachelors & Masters Degrees in Economics. Emigrating to the USA in 1996, Shaun quickly found a niche’ in Healthcare becoming the Executive Director of Surgical Specialty Associates, the largest multi-specialty surgical IPA in California with over 250 surgeons. In 2001 Shaun transitioned to the University of California San Diego, as Administrator for Surgical Services. In 2010, Shaun joined Balboa Nephrology Medical Group as Chief Operating and Financial Officer.

Mark Roberts is the Director of Revenue Cycle Management for Balboa United. Mark and his team have responsibility over some of Balboa’s front end and all back end revenue cycle functions ultimately to ensure services are properly accounted for, billed, and timely and properly reimbursed. With experience in multiple practice settings from small practice to large academic multispecialty medical groups and hospital systems, Mark focuses on driving sustainable improvements and automation across the system using a collaborative and data driven approach. This strategic approach helps ensure sustainability, proper reimbursement, and improved patient care outcomes and satisfaction.

Mark holds a Master’s in Business Administration and is Epic certified in Resolute Billing. He also holds multiple certifications from the Healthcare Financial Management Association (HFMA).

As a native San Diegan, Mark enjoys hiking the trails near his home, being active in his community, and DIY-ing.

Mark Fleury is the Director of Financial Operations for Balboa United. Mark has almost 20 years of experience in Accounting & Finance working in a variety of industries which include construction, hospitality, consumer goods, and now healthcare. Mark studied Political Science at Providence College in Rhode Island as well as Accounting at the University of California San Diego. He is a Certified Management Accountant and has a passion for both creating efficiencies and providing accurate and timely financial data to help manage the business.

Outside of work, Mark enjoys both watching and attending sporting events, traveling to as many parts of the world as he can, dining at San Diego’s amazing restaurants, and anything fitness related.

Jacel Raulli is the Director of Human Resources for Balboa United. Jacel has over 13 years of HR experience working in healthcare, finance, tech and hospitality. Jacel studied Psychology at the University of California, San Diego. Her career path has shaped her passion for employee engagement and culture. She sees working at Balboa United as the perfect bridge to continue her passion for HR while being part of the bigger picture of patient care.

Jacel enjoys spending time outdoors with her family and is frequently hiking or enjoying nature with them. She also loves to attend concerts, travel and read.

George Nilsson joined Balboa Research in January 2005 as the Clinical Research Coordinator and has served as the Clinical Research Director since 2022. He is a results-oriented leader with a proven ability to influence and collaborate across teams. George excels at building strong customer relationships and driving successful program outcomes.

His experience includes leading cross-functional initiatives, managing high-performing teams, and effectively communicating with stakeholders at all levels. He is a hands-on contributor with a passion for innovation and a strong commitment to delivering exceptional results.

Outside of work, George enjoys spending time with his family, including his wife and four children, and his five-year-old granddaughter. A proud US Marine veteran, he remains a dedicated San Diego Padres fan (even during challenging seasons). He also has a passion for aviation, having earned his pilot’s license, and enjoys off-roading adventures.

Sidney Montes is the Director of Operations at Balboa Nephrology, where she’s been a dedicated team member for over ten years. Currently, she’s completing her studies in Healthcare Entrepreneurship and Innovation at Arizona State University, further expanding her expertise in managing operations within the healthcare sector.

Outside of work, Sidney is a proud mother of two, spending much of her time at her children’s baseball and softball games. She’s also passionate about giving back to her community and enjoys being outdoors with her two Belgian Malinois. When she’s not at the ballpark or helping in her community, Sidney enjoys unwinding by cooking and baking, often experimenting with new recipes in the kitchen.

Glenn Davis joined Balboa United and Balboa Nephrology as a C suite Officer  in June 2019 and is currently the Executive in Residence. He holds a Bachelor of Science degree from the University of Maryland College Park in Business Administration and Management.

Glenn is active in the renal community, serving as President of  the Renal Services Exchange (RSE) – a program affiliated with the Renal Healthcare Association. He is also the President of Camino Renal Care – a value-based care organization focused on CMS/CMMI’s Comprehensive Kidney Care Contracting Mode.