CST Group, CPAs, PC
Portia Joo is an experienced professional with a diverse background in office management, executive assistance, and financial analysis. Currently serving as Office Manager at CST Group, CPAs, PC since May 2023, Portia previously contributed to Bublup as Executive Assistant to the CEO, supporting the executive team and optimizing schedules from November 2015 to April 2023. Earlier roles include Customer Relations Manager at H2 Collective, where Portia managed customer interactions, and Financial Analyst at the National Institutes of Health, responsible for processing loan applications and managing database systems. Early career experiences include positions at Computer Sciences Corporation and OPNET Technologies, where Portia focused on communications and sales support. Portia holds a Bachelor’s Degree from The George Washington University in the Elliott School of International Affairs.
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CST Group, CPAs, PC
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CST Group is a certified public accounting firm serving Northern Virginia and the Washington, D.C. region for over 45 years. We provide comprehensive accounting, tax, and business advisory services for small businesses, medical practices, real estate firms, government contractors, non-profit organizations, as well as for professionals and business owners. Our mission is to deliver forward-thinking client-centric solutions and industry-specific expertise from top-tier professionals. We steer our clients to success with innovative and effective solutions to their most pressing accounting, tax, and business challenges. Our team is comprised of experienced professionals dedicated to providing timely, highly personalized service to our clients. Over the years, CST Group has built significant long-term client relationships rooted in trust, transparency, and respect. CST Group is consistently ranked among the top certified public accounting firms in the Washington, D.C. region. Recent awards include 2018 When Work Works Award, 2018 Best of the Best Firms by INSIDE Public Accounting, 2018 Top 300 Firms by INSIDE Public Accounting and Washingtonian’s 2018 Top Wealth Adviser.