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OUM’s life sciences accounting and business advisory practice professionals in San Diego and San Francisco have the expertise, resources and relationships to help both public and private life science companies bridge the gap between business and science in today’s complex and volatile business environment. In the push to bring new products to market, companies from startups to multinationals must address a myriad of challenges, both financial and nonfinancial.

OUM’s life sciences group serves publicly traded and privately held companies in the biotechnology, pharmaceuticals, medical device, biopharma, and diagnostic sectors, among others. We understand the need to manage for immediate and long-term value in the face of lengthy, high-cost research and development cycles, government approvals, and difficult clinical trials.

With decades of experience working with both public and private life sciences companies, and the support of a National Office, our accountants and business advisors have the technical experience needed to be your life sciences accounting guides. In addition to providing the traditional tax and accounting services, we also assist our life sciences clients with services spanning the entire development cycle.


  • Integrated financial audit services and internal control over financial reporting for public companies
  • Audits of financial statements for public companies that are non-accelerated filers
  • Financial statement audits, reviews, and compilations for privately held companies
  • Assistance and technical research throughout the initial public offering process
  • Capital market financing transactions – as independent auditors, OUM has assisted its clients with well over 100 securities offerings totaling more than $3.0 billion since 2005.
  • Accounting guidance on complex or unusual transactions, such as revenue recognition for collaborative agreements, debt and equity financings, and business combinations
  • Financial due diligence for mergers and acquisitions and divestitures
  • Federal and state corporate income tax compliance
  • Income tax provisions and analysis of uncertain tax positions
  • Change of Ownership Analysis (IRC Section 382 Studies)
  • Consulting on tax matters, including deferred compensation issues under IRC Section 409A, intercompany transfer pricing, tax planning strategies and international taxation
  • Audits of 401K Plans

OUM did a great job of working with Atreca to help us prepare for our IPO, both in their timely audit and quarterly review processes, as well as in their timely feedback on our finance processes and internal control infrastructure. They provided much more than simply an opinion to go in the S-1, but also helped us understand where we needed to enhance our systems and processes in order to be prepared to operate as a public company post-IPO.

Herb Cross, Chief Financial Officer, Atreca, Inc.

OUM and team provide excellent, professional services and are a pleasure to work with. They are reliable, responsive, efficient and really understand our business. As audit committee chair at NovaBay, I rely on their expertise for audit and tax support as well as for sound strategic advice.

Gail Maderis, Audit Committee Chair, NovaBay Pharmaceuticals
Stacy Palermini profile photo

I have worked with OUM for four years and they are a great business partner…knowledgeable, professional, responsive and cost-effective. Each engagement provides new challenges and the OUM team consistently delivers high quality work within our required deadlines. OUM has a solid understanding of the life sciences industry and are fun to work with.

Stacy Palermini, VP of Finance, Alexza Pharmaceuticals
Tim Morris profile photo

I have engaged OUM at two publicly held biopharmaceutical companies. The team is the best alternative to a big 4 firm. They are knowledgeable, efficient and proficient. OUM will save you at least 50% on fees as compared to the big 4. They work with BDO for technical issues, have been fully vetted by PCAOB and my bulge bracket banker gave them rave reviews. I will use OUM anytime I can. They are awesome!

Tim Morris, CFO, lovance Biotherapeutics, Former CFO of AcelRx

We’ve worked with OUM for a number of years, and they have always been a reliable, trusted and valuable advisor to the company. They’ve supported us in various debt and equity financings, business development transactions and complex accounting issues.

Raffi Asadorian, CFO, AcelRx Pharmaceuticals

Please fill out the form to find out more about our life science practice, and how we can support your public or private company.


Warren Chung
Warren ChungPartner – Tax Services
Clara Fong
Clara FongPartner - Assurance & Advisory
Mustafa Kagalwala
Mustafa KagalwalaIT Advisory Director
Doug Pallotta
Doug PallottaPartner - Assurance & Advisory
Darwin Pangilinan
Darwin PangilinanPartner - Assurance & Advisory
Brad Weisert
Brad WeisertPartner - Tax Services