Contact Us
2266 Camino Ramon
San Ramon, CA 94583

Phone:      (925) 830-4848
Fax:          (925) 830-0252
Business Hours 
Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 4pm
Saturday: Closed
Sunday: Closed
(Closed 12pm - 1pm for lunch)
Phone hours
Monday - Friday
8:30am - 12pm | 1pm - 4pm
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Homeowner Association Services’ managers are members of the California Association of Community Managers (CACM) and have received certifications through CACM as noted below. 

You may contact your property manager via email by simply clicking on their name.
East Bay Office
Brian Ritter, CCAM
Brian Ritter joined the firm in 2001 after spending time in the marketing and operational fields. Brian has a Bachelor of Arts degree in Communication from the University of Arizona. Brian is a Certified Community Association Manager (CCAM) through the California Association of Community Managers. 
Brian manages a portfolio of prestigious accounts along with running the operational side of the business. Brian’s long tenure in the industry and ability to identify creative solutions has proven to be invaluable when complex and unique issues arise.
Ryan Bantz, CCAM, CPA
Ryan joined HAS in 2007 after working as a Certified Public Accountant in the public accounting industry. Ryan joined Randy as a partner at HAS in 2016. Ryan is a graduate of Cal Poly, San Luis Obispo, where he earned a Bachelor of Science degree in Business Administration with a concentration in Accounting.   
In addition to managing a portfolio of accounts, Ryan leads the accounting department and oversees all financial reporting of the company. Ryan’s experience managing all types and sizes of accounts, including working with developers on new construction, makes him a key part of the management team and a resource for other managers.  
Randy Ritter
Randy is one of the founding owners of HAS, entered the HOA management business after many years of Operational and Financial management experience with Allegiance Healthcare.  Randy has a Bachelor of Science degree in Finance from Indiana University.  Randy’s years of experience in the HOA industry lay the foundation of leadership and knowledge for our managers.
Randy has continued to manage a full portfolio of accounts even after selling his ownership stake in the business.
Stacey is a graduate of San Diego State University where she earned her degree in Economics with a minor in Marketing. She previously worked in the market research department of a firm in San Diego before joining HAS. Stacey has earned her Certified Community Association Manager designation from CACM and has quickly become an integral part of the HAS team, having become adept at managing both the physical maintenance of an association as well as mastering the art of managing people.
Karen Atkins recently the HAS management team after working her way from reception to assistant manager to a portfolio manager. Prior to joining us, Karen earned her BS in Business Administration from San Jose State University and worked in customer service and sales for two large marketing companies. Karen also served on the Board of her HOA for the past 10 years and has a unique perspective when it comes to knowing what a Board is looking for in a manager.

Rosie worked for two local management firms, gaining 20 years of industry experience before joining HAS in 2017. Rosie began as an on-site manager and worked her way up to a portfolio manager, with experience managing condos, town home and single family communities. Rosie is a Certified Community Association Manager (CCAM) through the California Association of Community Managers.


Cara joined the HAS team in 2018.  Cara has developed an outstanding reputation over her 12 years in the industry as a manager who is extremely responsive and experienced in dealing with all aspects of community management. Having worked as an on-site manager or for a different firm for most of her career, Cara brings a fresh approach to management that has provided HAS with the opportunity to evaluate where we can continue to grow.  
Jennifer has worked for Homeowner Association Services as an on-site manager for over 15 years, mastering all aspects of community management and customer service. Jennifer has also worked as an on-site community manager for an active adult community where she was responsible for managing staff, vendors and reporting to the Board frequently. Jennifer has earned her CCAM designation and was promoted to a portfolio manager in 2022. 
Jen joined HOA Services in 2020 after years working for the City of Orinda in the parks and rec department. Jennifer has earned her CCAM designation while gaining on-the-job training as a community manager on a variety of accounts and uses her customer-first mentality and positive attitude in her daily interactions with Board members, vendors and homeowners.
Erin graduated from Cal State Hayward earning a bachelor’s degree in business. She joined the HOA Services team with over 18 years of experience in the HOA management industry, bringing with her a wealth of expertise, professionalism, and a commitment to excellence. Erin believes in the importance of transparent and effective communication as a cornerstone for successful HOA management. Erin's journey in HOA management has equipped her with a deep understanding of the work ethic and intricacies involved in overseeing and enhancing community living. 
South Bay Office
Andrew joined Homeowner Association Services after ten years as an owner/manager of another local business.  Andrew earned his bachelor’s degree in interdisciplinary studies, focusing on political science and sociology from Arizona State University and began his career in carpentry for the San Francisco Opera. Andrew’s hands on approach and attention to detail are vital to his management style and helped to earn him a CACM Vision Award as the 2023 Rising Star. 
Andrew is the lead manager of our South Bay office, serving communities from Fremont to Gilroy.