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.

• Plan, schedule, and execute embryo transfer procedures in rodents and other small mammals.
• Perform hormone injections, oocyte and embryo recovery, and vasectomy.
• Conduct tissue collection and sample processing for downstream analysis.

• Provide post-surgical monitoring, care, and documentation following institutional and regulatory guidelines.
• Assist with validation of embryo transfer outcomes, including pregnancy checks, sample collection, and data reporting.

• Maintain accurate, timely records of procedures, sample inventory, animal IDs, outcomes, and quality-control data.
• Prepare reagents, materials, and surgical setups to support daily embryology workflows.
• Uphold compliance with IACUC, animal welfare standards, and laboratory safety procedures.

• Provide hands‑on training and technical support to internal researchers and collaborating teams.
• Communicate effectively with project managers and investigators to ensure aligned timelines and experimental plans.
• Contribute to optimization of SOPs, troubleshooting, and continuous improvement of embryology techniques.

Other tasks as assigned may include lab and husbandry support.

• Hands‑on experience with rodent 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.

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

• Bachelor’s degree in Biology, Reproductive Biology, Animal Science, Biotechnology, or a related field.
• At least 2 years of hands‑on experience with applied small animal reproduction.

• 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 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.

• Medical, dental, and vision coverage
• Excellent paid time off and company holidays
• Flexible spending accounts (FSA)
• Company matched 401k retirement plan
• Paid parental leave at 100% salary for up to 12 weeks
• Education reimbursement
• Other company‑wide benefits and commitment to environmental responsibility

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.