About Us

Iliana C. Theissen has been working in finances for multiple companies for more than 15 years. During this time she has been managing all financial functions including, but not limited to, accounts payable, accounts receivable, quarterly closures bank reconciliations, financial reporting and analysis, cash flow budgeting and payroll supervision. Iliana founded Theissen & Co. in 2017. Besides supporting customers from other business areas, Iliana’s main focus are therapists and the Los Angeles entertainment industry. Iliana holds a Master’s Degree in Spiritual Psychology and a Bachelor’s Degree in Industrial Engineering. Iliana is an Intuit Certified QuickBooks User and a Intuit Certified QuickBooks ProAdvisor. 

Contact Us Today!

Theissen and Co. LLC
4712 Admiralty Way, Unit 634

Marina del Rey, CA 90292

Phone: +1 310-850-4002 +1 310-850-4002


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