

Olya Lumelleau is a Partner at LCS Forensic Accounting & Advisory, specializing in financial due diligence, transaction advisory, and Quality of Earnings (QoE) assessments across Commercial Construction, Healthcare, and Manufacturing. With her background in public accounting and financial advisory, she manages clients with over $1 billion in assets under management and is a recognized speaker on M&A financial diligence.
About Me
Background & Professional Experience
Olya Lumelleau is a Partner at LCS Forensic Accounting & Advisory (LCS), where she has been instrumental in expanding the firm’s capabilities and delivering high-quality financial due diligence services since becoming a shareholder in 2020. With a strong foundation in public accounting and financial advisory, Olya brings extensive expertise in financial analysis, transaction advisory, and Quality of Earnings (QoE) assessments.
Before joining LCS, she gained valuable managerial and accounting experience in the construction industry, providing her with a practical, hands-on understanding of financial operations and reporting. Today, she manages clients with over $1 billion in assets under management, guiding investors and business owners through critical financial diligence processes to support sound decision-making in mergers and acquisitions.
Industry Expertise & Leadership
Olya specializes in Commercial Construction, Healthcare, and Manufacturing, offering tailored financial diligence solutions to identify key risks, assess financial stability, and validate earnings quality. As a Certified Public Accountant (CPA), she upholds the highest professional standards while delivering clear, data-driven insights that support strategic investment decisions.
She is also a recognized speaker at M&A seminars, where she regularly presents on financial due diligence best practices, helping professionals navigate the complexities of transaction-related financial analysis.
In addition to her work at LCS, Olya serves as a board member for a private commercial HVAC and refrigeration platform company, where she provides financial oversight and strategic guidance to support the company’s growth and operational efficiency.
Education & Certifications
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Certified Public Accountant (CPA) - Licensed in Texas
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B.S. in Accounting & B.S. in Finance – Ivan Franko National University of Lviv, Ukraine
Contact Information
Tel: 713-224-5914
Houston, TX Office
Email: olumelleau@lcsfirm.com
A first-generation Ukrainian immigrant, Olya’s journey reflects resilience, adaptability, and a strong commitment to excellence. Fluent in English and Ukrainian, she bridges cultures and fosters meaningful connections with a diverse range of clients and industry professionals. She resides in Houston, Texas, with her husband and daughter. When not working, Olya enjoys spending time with her family, traveling and supporting organizations focused on cancer research.