About Takmos LLC

Specialized. Adaptive. Symbiotic.

Takmos - What's in a name?

In Dutch, the word takmos is a branch moss, a type of lichen. Lichens are easily overlooked heroes of the ecosystem.

Symbiotic organisms consisting of fungus, photosynthetic algae, and yeast, lichens survive the harshest environments. Commonly observed on exposed rock faces, lichens provide essential nutrition to multiple animal species, particularly during winter months when vegetation is sparse. Lichens are also among nesting materials used by various species of birds.

Like our namesake, Takmos LLC provides essential, specialized support enabling our clients to build great things.


Renee Hartsook PhD DABT

A board certified toxicologist with two decades of industry experience, I am available as a consulting toxicologist with emphasis in:

  • Occupational Health
    • Hazard Banding
    • Derivation of Occupational Exposure Limits (OEL)
    • Safety Data Sheet Authoring
  • Product Quality Toxicology
    • Health-based Exposure Limits (Permitted Daily Exposure Limits)
    • Excipient Monographs
    • Non-conformance Risk Assessments
    • ICH M7 (mutagenic impurities) assessments using best-in-class QSAR software.

As a nonclinical toxicologist, my experience includes pharmaceutical development, medical devices, pulmonary toxicology, GLP audit process, and product stewardship. I accept projects in these areas on a limited basis.

Both my bachelor’s degree in Environmental Toxicology and my Ph.D. in Pharmacology and Toxicology are from the University of California, Davis. My doctoral work received recognition by the Society of Toxicology with the Mary O. Amdur award for contributions in the area of environmental health.