Small Animal Reproductive Specialist

We are seeking a highly motivated Specialist to support our rodent and small-mammal assisted reproduction and colony-generation and maintenance programs. This role is essential to enabling advanced research through high-quality embryo transfer reproductive procedures and embryology support services. The ideal candidate is detail-oriented skilled in microsurgical or micro-manipulation techniques and comfortable working in a fast-paced research environment.

**This position will be based in Dallas TX** Relocation assistance is available.

Duties and Responsibilities:

Embryo Transfer & Microsurgical Procedures

• Plan schedule and executeembryo transfer proceduresin rodents and other small mammals.
• Performhormone injections oocyte and embryo recoveryandvasectomy.
• Conducttissue collectionand sample processing for downstream analysis.

Post-Procedure Animal Care & Well-Being

• Providepost-surgical monitoring care and documentation following institutional and regulatory guidelines.
• Assist withvalidation of embryo transfer outcomes including pregnancy checks sample collection and data reporting.

Laboratory Operations & Record Management

• Maintain accurate timelyrecordsof procedures sample inventory animal IDs outcomes and quality-control data.
• Prepare reagents materials and surgical setups to support daily embryology workflows.
• Uphold compliance withIACUC animal welfare standards and laboratory safety procedures.

Training & Collaboration

• Provide hands-ontraining and technical supportto internal researchers and collaborating teams.
• Communicate effectively with project managers and investigators to ensure aligned timelines and experimental plans.
• Contribute to optimization ofSOPs troubleshooting and continuous improvement of embryology techniques.

Other tasks as assigned may include lab and husbandry support.

Required Skills and Abilities:

• Hands-on experience withrodent handling anesthesia surgical procedures or microsurgical techniques.
• Experience with embryo transfer reproductive technologies and rodent colony management
• Demonstrated ability to follow detailed protocols and maintain precise laboratory documentation.
• Strong understanding of laboratory safety sterile techniques and animal welfare guidelines.
• Understanding of colony management pedigree and mate selection paradigms.
• Previous work in an academic biotech or vivarium environment supporting research teams.

Preferred

• Experience with IVF/ICSI.
• Familiarity withoocyte or embryo collection injections cryopreservation or microinjection tools.

Required Education and Experience:

• Bachelors degree inBiology Reproductive Biology Animal Science Biotechnology or a related field.
• At least 2 years of hands-on experience with applied small animal reproduction.

Core Competencies

• Exceptional attention to detail and manual dexterity.
• Ability to work independently while maintaining strong team communication.
• Strong problem-solving skills and comfort with learning new techniques.
• Commitment to high standards of animal care and scientific quality.

Work Environment

• Work is performed in a research laboratory and animal facility.
• Position requires routine handling of rodents and small mammals use of anesthetics and surgical tools.
• Occasional weekend or holiday work may be required depending on experimental timelines.

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. Thats 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 were 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 proud to be named a Best Place to Work by BuiltIn for 4 years in a row across multiple categories inand 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) inand 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.

Newsweeks Most Loved Workplaces 2024 Award List - Excited to be amongst the winners of Newsweeks 2024 Most Loved Workplaces!