Lab Technician

Responsibilities

• Express recombinant proteins in

E. coli

• Assess protein concentration, yield, and purity using SDS-PAGE and protein concentration assays.
• Prepare and replenish culture media, buffers, stock solutions, and experimental reagents, including accurate weighing, dilution, pH adjustment, and sterilization as appropriate.
• After training, handle and maintain mammalian cells, including thawing, media changes, passaging, cell counting, viability assessment, and cryopreservation.
• Monitor cell morphology, confluency, and culture health; follow aseptic practices and promptly report contamination or unexpected results.
• Label, store, and track proteins, reagents, and cell stocks, maintaining clear records of preparation, production, quality control, and cell maintenance.

Requirements

• Bachelor’s degree in Biology, Biochemistry, Bioengineering, Molecular Biology, Chemistry, or a related field.
• At least two years of hands-on laboratory experience, including relevant academic research, internships, or industry experience.
• Hands-on experience with molecular biology and protein purification.
• Familiarity with SDS-PAGE, protein concentration assays, accurate pipetting, solution preparation, and routine laboratory calculations.

Preferred

• Experience expressing recombinant proteins in both

E. coli

• and yeast.
• Experience with chromatography systems.
• Experience with larger-scale protein production and batch control.
• Candidates with strong protein-production experience who are interested in learning these techniques are encouraged to apply.

About the Role

We are seeking a motivated and detail-oriented Lab Technician to support recombinant protein production and media, buffer, and solution preparation within the Molecular Development team. The role includes expressing and purifying proteins using bacterial and yeast systems, performing routine protein quality-control analyses, and maintaining accurate sample and batch records.

The technician will also receive training in routine mammalian cell handling and maintenance. This position is well suited to someone who enjoys hands-on laboratory work, follows protocols carefully, and takes pride in consistent, reproducible results.

Work Schedule

This is an on-site role. The regular schedule includes at least two later-start, later-finish workdays per week to support time-sensitive laboratory workflows. These are shifted workdays rather than routinely extended days, coordinated in advance with the team.

Key Responsibilites

• and yeast using established protocols, including culture preparation, growth, induction, and harvesting.
• Purify proteins using affinity chromatography, concentration, and buffer exchange.

Required Qualifications

• Familiarity with aseptic technique, laboratory safety, and contamination-control practices.
• Strong organization, attention to detail, and documentation skills, with the ability to follow protocols, coordinate multiple tasks, and communicate deviations.

Preferred Qualifications

Experience with routine mammalian cell handling and maintenance.

Benefits

• Generous medical, dental and vision insurance coverage
• Flexible time off and paid holidays

Competitive compensation package, including salary and equity

Access to a 401(k) retirement savings plan

FSA and commuter benefits

• Daily lunch and dinners, plus a variety of snacks
• Monthly learning stipend
• On-site fitness center

Quarterly team social budget

As an equal opportunity employer, Until is committed to providing employment opportunities to all individuals. All applicants for positions at Until will be treated without regard to race, color, ethnicity, religion, sex, gender, gender identity and expression, sexual orientation, national origin, disability, age, marital status, veteran status, pregnancy, or any other basis prohibited by applicable law.