Retro develops therapies for diseases driven by the biology of aging. We focus on cellular reprogramming and autophagy to rejuvenate cell and tissue function with the ultimate aim of adding 10 years to healthy human lifespan.
We’re building a mission-driven team of accomplished and kind individuals who embrace our startup culture of rapid iteration, transparency, and versatility.
We are hiring a Histology Specialist to build and run Retro’s first in-house histology capability. You’ll be the primary histologist supporting multiple scientific programs - including our Microglia, Tissue Reprogramming, and Autophagy teams - performing FFPE and cryo-sectioning workflows from embedding through staining and imaging. Tissue processing will continue to be outsourced to a CRO; everything else happens in-house with you. You will work in a dedicated histology lab space and be a part of the Scientific Operations team - a close-knit group of dedicated, resourceful humans, handling all things labs, facilities, and logistics.
About you:
You’re a skilled bench histologist who takes pride in producing high-quality sections and stains. You’re comfortable working independently, juggling requests from multiple teams, and building workflows from scratch. You’re organized, detail-oriented, and proactive - the kind of person who keeps a lab running smoothly without being asked. You communicate clearly with scientists, understand what they need from their tissue, and can advise on best practices from fixation through imaging.
What you’ll do in this role:
Own the day-to-day operation of Retro's histology workflows — managing work prioritization, quality control, and turnaround timelines
Independently triage and schedule work across programs, communicating realistic timelines, flagging conflicts early, tracking sample throughput, and maintaining organized records
Perform tissue and organoid embedding, paraffin and frozen sectioning, vibratome sectioning, and slide preparation for multiple scientific teams
Conduct IHC and IF staining, including protocol optimization and new antibody validation
Perform H&E staining and special stains as needed
Develop and document SOPs for all histology workflows, building up the institutional knowledge for Retro’s histology practice
Operate and maintain standard histology equipment - embedding center, microtome, cryostat, vibratome, water baths, fume hood, and associated instruments
Coordinate with CROs for tissue processing and ensure quality of incoming processed tissues
Decalcify tissues as needed for bone or calcified samples
Assist with imaging of stained sections or coordinate with instrument engineers for imaging support
Manage histology supplies inventory, ordering, and lab organization
Provide guidance to scientists on tissue collection, fixation, and handling best practices to ensure downstream quality
You might thrive in this role if you:
Have 3-5 years of hands-on histology experience with FFPE workflows - embedding, microtomy, and staining
Are proficient with both paraffin sectioning, cryosectioning, and vibrating sectioning
Have experience with IHC and/or IF staining, including antibody titration and protocol troubleshooting
Have demonstrated ability to work independently and manage multiple concurrent requests — you've been the go-to histologist that teams rely on
Are naturally organized and detail-oriented - you keep clean records and a clean lab
Communicate clearly and effectively - whether discussing tissue orientation with a scientist or coordinating things
Are hands-on and proactive - you don’t wait to be told when something needs to be done
Bonus if you have experience with:
Biotech, pharmaceutical, or academic research histology core environments
Image analysis or digital pathology tools
Training others on histology techniques
GLP or regulated laboratory environments
We take pride in cultivating an environment that fosters collaboration, open communication, and authenticity. We believe that great results are best delivered by a highly creative team working in concert. We are an equal opportunity employer; we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We are diverse in background and singular in mission.
Skills Required
- 3-5 years hands-on histology experience with FFPE workflows (embedding, microtomy, staining)
- Proficient with paraffin sectioning, cryosectioning, and vibrating sectioning
- Experience with IHC and/or IF staining, including antibody titration and protocol troubleshooting
- Experience performing H&E and special stains
- Ability to operate and maintain histology equipment (embedding center, microtome, cryostat, vibratome, water baths, fume hood)
- Ability to independently triage and schedule work, manage priorities, QC, and maintain organized records
- Clear communication with scientists regarding tissue collection, orientation, fixation, and downstream needs
- Develop and document SOPs for histology workflows
- Experience in biotech, pharmaceutical, or academic core histology environments
- Familiarity with image analysis or digital pathology tools
- Experience training others on histology techniques
- Experience in GLP or regulated laboratory environments
What We Do
Retro is a Japanese marketplace platform that facilitates the buying and selling of secondhand luxury goods. They operate both an e-commerce site and an auction service, focusing on authenticated branded items such as clothing, bags, and accessories. Their mission is to simplify the process of trading personally owned assets through seamless digital transactions and web marketing.
