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About the job

Colossal is looking for a talented cell or developmental biologist with an interest in the manipulation of avian primordial germ cells. You will work closely with other lab team members in efforts to innovate on protocols of avian primordial germ cell culture, and reintroduction into embryos using cutting edge technologies.

This position is based out of Dallas, TX. Relocation assistance is available.

Duties and Responsibilities:

Test novel cell culture conditions, sort, screen, and expand avian primordial germ cells according to latest protocols and newly developed approaches

Using a dissection microscope, collect blood and tissue from avian embryos for use in cell line derivations.

Using a micropipette under a microscope, inject primordial germ cells into surrogate embryos

Work on project milestones

Attends lab meetings, prepares reports and presentations on the progress of projects

Great organizational skills and excellent laboratory record maintenance

May require some international travel

Required Skills and Abilities:

Experience manipulating embryos under a microscope

Experience in cell line derivation, culture, propagation, and transfection methodologies

Experience in molecular biology (nucleic and protein extraction, gel electrophoresis)

Experience with qPCR, FACS, flow cytometry, immunostaining

Strong written and oral communication skills, as well as creative problem-solving skills

Education and Experience:

BA/BS/MA/MS in biological sciences, developmental biology, bioengineering, molecular biology, genetics, or any science related field.

What Colossal Offers Full-Time Employees:

Medical, dental, and vision coverage

Excellent paid time off and company holidays so you can rest and recharge

Flexible spending accounts (FSA)

Company matched 401k retirement plan

Paid parental leave at 100% salary for up to 12 weeks

Education reimbursement

An opportunity to help us return the Earth to a healthier state

The team at Colossal is committed, colorful, passionate, intelligent, collaborative, creative, experienced, scientific and world-class. That sounds like a lot to fit into one building. That’s why we are spread out in several locations that include laboratories, test facilities, academic institutions, libraries and offices.

Through it all, however, we maintain a culture of positivity, hope, happiness and belief that we’re doing something big. Something Colossal.

Colossal is proud to be an equal employment opportunity workplace. We welcome people from all backgrounds as well as celebrate and support diversity. We are committed to providing an inclusive environment of mutual respect that is free from discrimination and harassment so everyone can thrive.

EEO is the Law

Search Firm Representatives: Colossal does not accept unsolicited assistance from search firms. No fees will be paid for a hired candidate where no pre-existing agreement is in place. We handle most recruitment in-house.

Colossal is on LinkedIn's 2026 Top Startups in Dallas List! See the list here.

Colossal is on Fortune's 2026 List for Best Workplaces in BioPharma. See the list here .

Colossal is proud to be named a Best Place to Work by BuiltIn for 4 years in a row across multiple categories in 2023, 2024, 2025, and 2026:

#1 on the 50 Best Startups to Work For in Dallas in 2023!

100 Best Midsize Places to Work in Dallas in 2024 & 2025

100 Best Places to Work in Dallas, TX (All Size Employers) in 2024, 2025, and 2026.

Built In 2026 Award Lists

Great Place to Work Certification Page

Most Loved Workplace Certification Page - Proud to be certified as a most loved workplace including: most loved CEO, most loved workplaces for LGBTQ+, most loved workplaces for women, and most loved workplaces for young professionals.

Newsweek's Most Loved Workplaces 2024 Award List - Excited to be amongst the winners of Newsweek's 2024 Most Loved Workplaces!