TEAM LEADS
Rina Castillo - Director of Portfolio Management
Rina is responsible for overseeing the property portfolio and the property management team. She works closely with the executive team on business direction, portfolio performance, staff development, and administrative policies. Upper management relies on Rina’s oversight of manager performance and HOA operations to ensure the portfolio is well supported from both a staffing and resource standpoint. Rina is a key part of our business. She also manages the financial and day-to-day operations of multiple residential community associations, including properties with onsite staff who require payroll services. Rina works closely with property owners, boards of directors, vendors, and property personnel to ensure that all properties comply with the Davis-Stirling Act and city building codes. Rina is a native San Franciscan and holds a BA in Psychology from UC Santa Cruz. Prior to working at HSM, she worked in social services, assisting low-income families who struggled to pay their rent. She collaborated closely with private landlords and property managers across the Bay Area, which sparked her interest in community association management. Her positive and caring personality has made her a great asset to our clients and our team.
Chase Sethi - Senior Portfolio Manager
Chase Sethi is a Senior Portfolio Manager at HSM. He is a key contributor to portfolio management and staff development efforts. Also, he is a property and project management top performer across all sectors. Chase comes to HSM with a strong background in real estate, finance, and marketing. He graduated from University of San Diego with a Bachelor of Business Administration degree in Real Estate and Marketing. His previous role as a real estate appraiser provided him with valuable insights into property valuation and market trends. Chase is known for his exceptional communication, teamwork, and problem-solving skills. Driven by a passion for continuous learning and personal growth, he’s dedicated to contributing to his community and is eager to help out when needed. Outside of work, Chase enjoys travelling, watching and playing sports, and values quality time with family and friends.
Constance Ye - Senior Bookkeeper and Business Manager
Constance joined HSM Property Management in 2018 as an accounting assistant. She is now the Senior Bookkeeper and Business Manager for HSM. Constance is very knowledgeable in many software programs, including QuickBooks and all Microsoft Office products. Her daily responsibilities include but are not limited to preparing financial statements, budget development, accounts receivables, and accounts payables. She also monitors HSM’s financial stability, working closely with the President of Property Management for institutional development. Constance has a Bachelor of Science in Finance from San Francisco State University
Property Managers
Jessica Ramirez - Senior Property Manager
Jessica is a Senior Property Manager at HSM, where she oversees the daily operations and management of residential community associations throughout the company's portfolio. She works closely with Boards of Directors, homeowners, vendors, and on-site staff to ensure communities are well-maintained, financially organized, and operating efficiently. With a background in administration, Jessica is known for her proactive communication, responsiveness, and attention to detail. Her responsibilities include coordinating vendor maintenance, managing projects, supporting board meetings, assisting with budgets and payroll processes, and helping ensure compliance with local regulations and community standards. She is dedicated to creating positive experiences for both residents and board members while helping communities operate smoothly day to day. Jessica also enjoys planning company and HOA community events, including happy hours and resident gatherings that help foster connection and strengthen community relationships. Jessica holds a Bachelor of Arts in International Business from Santiago de Cali University in Colombia, along with a certificate in Finance. Prior to joining HSM, she gained valuable experience in administrative operations and vendor management in the public sector for the city of Half Moon Bay, which she now brings to her work in property management. Outside of work, she enjoys hiking, spending time with family and friends, and exploring the outdoors.
Rajan Edwards - Property Manager
Born and raised in San Francisco, Rajan Edwards brings a deep local understanding and a passion for building community to his work. He studied Communications at UC Santa Barbara and began his career as a Deputy Court Clerk for the Superior Court of San Francisco. Rajan has experience in business banking, property management—holding a CCRM (California Certified Residential Manager) designation—and successfully owned and operated a small business for several years. Prior to joining HSM Management, he managed large-scale residential construction projects for a major San Francisco builder, specializing in ground-up residential developments. Today, he draws on his diverse background in finance, entrepreneurship, construction, and property management to deliver responsive, thoughtful service while maintaining the high standards clients expect.
Simon Tan - Property Manager
Simon joined HSM in 2025 as a Property Manager, bringing with him a background in finance, technology, and customer service. He is known for his responsiveness, friendly approach, and dedication to helping homeowners and residents resolve issues efficiently and professionally. Simon enjoys learning new things and believes adaptability and continuous growth are essential in property management. He has a Bachelor of Arts in Business Economics from University of California, Riverside. Outside of work, Simon enjoys exploring different noodle and boba shops, video games, cheering for his favorite sports teams, and taking weekend trips.
Oscar Rosales - Property Manager
Oscar Adonay Rosales started working at HSM as a property manager in 2026. He holds a Bachelor of Science in Business Management from San Francisco State University. His education is complimented by work experience in logistics and retail management. Oscar's strengths as a property manager include his professionalism, respectful approach, attention to detail, strong organization skills, and prompt response time. He takes pride in providing friendly and efficient service, focusing on resolving matters smoothly and in a timely matter. This service helps foster strong relationships with Board members, residents, and vendors. Oscar believes that strong organization, preparation, clear communication, and a proactive mindset are essential to effective property management. Outside of work, he enjoys watching sports, being outside, and exploring all the different dining options the Bay Area has to offer.
Josh Zepeta - Property Manager
(Bio coming soon)
Bookeeping
Irene Ye - Bookkeeper
Irene joined HSM in 2020 after completing her studies at San Francisco State University. Her primary role is the preparation of financial reports and data input. Along with other staff members, Irene is fluent in Cantonese, Mandarin, and English. Her enthusiasm and productivity make her an essential part of the bookkeeping team. She places an emphasis on communication and teamwork, working closely with others to complete tasks at a high level. Irene is committed to collaboration and pursuing a friendly work environment.
Mei Chan - Bookkeeper
Mei joined HSM Property Management in 2021 as an office manager. She graduated from San Francisco State University with a bachelor’s degree in finance. She is responsible for making the office run smoothly by frequently interacting with clients, answering general office phone calls and emails. She also ensures the office has the necessary supplies, and she coordinates the office activities. Not only does she oversee the day-to-day office administrative duties, but she also assists the accounting department, including invoicing, accounts payable, and receivables.
Carmen Ye - Bookkeeper
Carmen joined the HSM team as a bookkeeper in 2025. A graduate of San Francisco State University with a degree in Accounting, her core routine involves preparing monthly financial reports, performing data inputting, and maintaining bank accounts and tracking transactions for Homeowners Associations (HOAs). Carmen is skilled in using several popular accounting software programs.
OFFICE MANAGER
Janet Saldivar - Office Manager
Janet started working with HSM in 2023. She graduated from San Francisco State University with a major in Business Administration. Janet is our office manager and assistant to the accounting team. She is the first person you interact with when calling or visiting our office. She is focused on providing great customer service and helping find solutions to whatever our clients or vendors need. Before working at HSM, Janet was a receptionist/office assistant and a senior assisted living community. This experience helped her build the customer service and organizational skills required to be successful in her current position at HSM.