Costa Mesa CPA firm | 714-492-7560

Meet Our Team

At Nguyen & Company, CPA, when you become our client, our team becomes part of your team. Learn more about the qualifications of our team members below then give us a call at 714-492-7560 to schedule your free initial review and consultation. We look forward to developing a partnership with you and your business!

H. (Andrew) Nguyen, CPA

Business Consulting & Management Advisory

Andrew Nguyen CPA


  • CSULA, College of Business & Economics
    • BS in Accounting


An experienced CPA with solid hands-on business practice leadership in management and operational accounting with deep understanding of client service value. He is the driven force with each clients in leading a team of over 4 diversified professionals.

With over 25 years of comprehensive financial reporting & planning, tax accounting, legal, human resources, and private banking experience, his diversified management of private & public industry experience in helping small and medium businesses grow profitably. His deep industry expertise came from serving clients involved in the domestic and global sector with warehousing/distribution, brick and mortar retailing, online retailing, environmental services.

Carlos Cuencas

Business & Finance Advisory

Carlos CuencasEducation

    • Boston University, Questrom School of Management
    • BS in Finance, minor in Art History


Carlos joined the Firm since it was founded. His primary disciplines include hands-on with business finance and operations in consulting for corporations, partnerships, and sole proprietorship. Carlos also consults with clients on setting up business entity structure, operations flow, personnel development, and cash flow management. Carlos’s specialty is in the delivery with client's specific needs through analysis and actively execute operational plans to deliver measurable results.

Prior to joining the Firm, Carlos assisted small privately held company in managing the daily accounting and operation of residential rental property with multiple units. Carlos previous experience as a high-end retail sales associate provided him with a deep understanding of personal quality service with passion in delivering value.

Carlos is actively managing multiple clients operation to include sales, customers, and vendors to insure execution of variance and exceptions for corrective actions. He is actively participating in client’s cash management and all IT needs.

His goal is to  work towards a CFA certification.

Gianna Nguyen

Accounting & Operational Advisory

Gianna Nguyen


  • Boston University, Questrom School of Management
    • BS in Accounting & Operations, minor in Anthropology


Gianna joined the Firm in September 2014. Her primary disciplines include accounting system set-up and reporting with operational focus in structure and control design. She also specializes in operational accounting control of G/L, A/R, A/P, P/R, Inventory and Sales to insure accuracy, effectiveness, and timeliness.  Her deep focus in to provide clients consultation with respect to accounting variances review and analysis. She works with closely-held entities as well as publicly-traded companies.

Prior to joining the Firm, Gianna spent over a year at Birch Street Systems as a Associate Project Manager where she worked in accounting & operations to design and implementation of software for hospitality industry. Gianna was also involved in various consulting engagements, including client training and support.

She is currently working toward a CPA certification.

Giselle Bui

Technology Consulting & Implementation

giselle bui


    • Northeastern University, College of Social Sciences & Humanities
      • BS in Economics


Giselle joined Nguyen & Company in 2016 with over 4 years of technology implementation and systems experience. She is responsible for the firm's technology consulting and implementation services. Prior to joining Nguyen & Company, she held several business analyst positions at both technology consulting and software firms including CGI Group and Vitech Systems Group. Giselle earned a BS in Economics from Northeastern University. She is also a certified RYT 200 Yoga Teacher with Yoga Alliance.



  • Emerson College
  • BS in Writing, Literature, & Publishing


Daniella joined the firm in June 2015. She is a recent college graduate and now focuses her attention on working within business operations specifically A/R, A/P, and collections. She manages the details and fundamentals of each business to ensure smooth day to day operation. Not only does she work on daily operations but she also works with a wide variety of companies ranging from Lab Equipment Distributors to Media and Advertising firms. Her adaptability and eye for detail establish a firm foundation for company growth.

Prior to her work with Nguyen & Company, Daniella worked with the USO, Zachary, Schuster & Harmsworth, and Wilde Press. Throughout her professional career, Daniella provided a stable operational environment, which enabled each company to work towards their quarterly goals.