![Diem Nguyen](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Diem Nguyen
Chief Executive Officer at
SIGA TECHNOLOGIES, INC.
Net worth: 608 173 $ as of 2026-06-29
Profile
Diem Nguyen is currently Chief Executive Officer & Director at SIGA Technologies, Inc. since 2024.
Dr. Nguyen serves as Independent Director at Candel Therapeutics, Inc. since 2021 and at Verrica Pharmaceuticals, Inc. since 2020.
Dr. Nguyen is Director at Vitara Biomedical, Inc. and Trustee at The Children's Hospital of Philadelphia.
Former roles include President, Chief Executive Officer & Director at Xalud Therapeutics, Inc. from 2020 to 2024; Executive Vice President-Biopharma at PPD, Inc. from 2018 to 2020; Global President-Americas at Pfizer Essential Health from 2017 to 2018; and Senior Director-Corporate Development at Serologicals Corp.
from 2004 to 2006.
Education includes undergraduate and doctorate degrees from the University of Virginia and an MBA from the University of Virginia Darden School of Business, conferred in 1999.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-04-16 | 138,767 ( 0.19% ) | 505 112 $ | 2026-06-29 | |
| 2026-06-22 | 10,000 ( 0.01% ) | 103 000 $ | 2026-06-29 | |
| 2026-06-04 | 10 ( 0% ) | 61 $ | 2026-06-29 |
Diem Nguyen active positions
| Companies | Position | Start |
|---|---|---|
| VERRICA PHARMACEUTICALS INC. | Director/Board Member | 2020-06-08 |
| CANDEL THERAPEUTICS, INC. | Director/Board Member | 2021-07-14 |
| SIGA TECHNOLOGIES, INC. | Chief Executive Officer | 2024-01-26 |
The Children's Hospital of Philadelphia
 The Children's Hospital of Philadelphia Hospital/Nursing ManagementHealth Services Operates hospitals | Director/Board Member | - |
Vitara Biomedical, Inc.
 Vitara Biomedical, Inc. Packaged SoftwareTechnology Services Develops therapeutic platform | Director/Board Member | 2021-06-30 |
Former positions of Diem Nguyen
| Companies | Position | End |
|---|---|---|
Xalud Therapeutics, Inc.
 Xalud Therapeutics, Inc. BiotechnologyHealth Technology Operates as a clinical-stage biotechnology company advancing a non-viral plasmid DNA delivered gene therapy platform to treat pathologic inflammation | Chief Executive Officer | 2023-12-31 |
| PPD, INC. | Corporate Officer/Principal | 2020-03-31 |
Pfizer Essential Health
 Pfizer Essential Health Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Corporate Officer/Principal | 2018-02-28 |
Serologicals Corp.
 Serologicals Corp. Miscellaneous Commercial ServicesCommercial Services Researches, develops and markets biological products | Corporate Officer/Principal | 2006-06-30 |
Training of Diem Nguyen
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
53
1st degree connections
11
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 11 |
|---|---|
Serologicals Corp.
Serologicals Corp. Miscellaneous Commercial ServicesCommercial Services Researches, develops and markets biological products | Commercial Services |
SIGA Technologies, Inc.
 SIGA Technologies, Inc. Pharmaceuticals: MajorHealth Technology Develops vaccines and antibiotics | Health Technology |
University of Virginia
 University of Virginia Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Candel Therapeutics, Inc.
 Candel Therapeutics, Inc. BiotechnologyHealth Technology Develops and distributes immunotherapies for the treatment of cancer | Health Technology |
University of Virginia Darden School of Business
 University of Virginia Darden School of Business Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The Children's Hospital of Philadelphia
The Children's Hospital of Philadelphia Hospital/Nursing ManagementHealth Services Operates hospitals | Health Services |
Xalud Therapeutics, Inc.
Xalud Therapeutics, Inc. BiotechnologyHealth Technology Operates as a clinical-stage biotechnology company advancing a non-viral plasmid DNA delivered gene therapy platform to treat pathologic inflammation | Health Technology |
Verrica Pharmaceuticals, Inc.
 Verrica Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
PPD, Inc.
 PPD, Inc. BiotechnologyHealth Technology Engages in research and development of biopharmaceutical industry | Health Technology |
Pfizer Essential Health
Pfizer Essential Health Pharmaceuticals: MajorHealth Technology Manufactures pharmaceutical products | Health Technology |
Vitara Biomedical, Inc.
Vitara Biomedical, Inc. Packaged SoftwareTechnology Services Develops therapeutic platform | Technology Services |
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