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Blood Gas Technician, Per-Diem, Rotating Shifts

Northwestern Medicine · Chicago, IL · Part time · Health Care Provider

Posted Sep 21, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

This is per diem on rotating shifts. How does that fit your life?

What they are checking: Honest fit with the arrangement the posting states.

What would you do

You get a result that does not fit the patient. What do you do?

What they are checking: The posting names identifying and correcting problems that could affect test performance or reporting.

A clinician calls questioning a result. How does that conversation go?

What they are checking: The posting names communicating with physicians, nurses and therapists.

You come in to cover after not working for a while. What do you check first?

What they are checking: The real skill of per diem laboratory work, which is confirming the instrument before trusting it.

About the work

Tell me about running blood gas analysis and the equipment you have used.

What they are checking: The posting names exacting measurements on whole blood and other fluids.

Walk me through calibrating an analyzer and what you do when a calibration fails.

What they are checking: The posting names preventative maintenance, calibrations and repairs.

How do you know a specimen is not suitable for analysis?

What they are checking: Blood gas specimens degrade fast, and accepting a bad one produces a confident wrong answer.

What do you understand about how respiratory therapy uses your results?

What they are checking: The posting names specialized knowledge of respiratory modalities and cardiopulmonary physiology.

How do you document a problem you found and corrected?

What they are checking: The posting names documenting problems, which is what makes the correction traceable.

Tell me about your degree or college training in a health science.

What they are checking: The posting requires a bachelor's or two years of college training plus laboratory experience.

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The full job description

As published by Northwestern Medicine.

The Blood Gas Technician reflects the mission, vision, and values of Northwestern Medicine, adheres to the organization's Code of Ethics and Corporate Compliance Program, and complies with all relevant policies, procedures, guidelines and all other regulatory and accreditation standards. Responsibilities: • Responsible for performing exacting laboratory measurements on whole blood supernatants and other fluids. • Performs preventative maintenance, calibrations and repairs on various lab equipment. • Identifies, corrects and documents problems that may adversely affect test performance or reporting. • Acquires specialized knowledge of Respiratory Therapy modalities and cardiopulmonary physiology essential for assessing the compatibility of laboratory data to the patient's condition. • Compiles daily statistics as directed. • Communicates with physicians, nurses, therapists and other clinical personnel to achieve optimal patient care Required: • Bachelor's degree or two years of college training in a health related science. • Laboratory experience. Northwestern Medicine is an equal opportunity employer (disability, VETS) and does not discriminate in hiring or employment on the basis of age, sex, race, color, religion, national origin, gender identity, veteran status, disability, sexual orientation or any other protected status. Background Check Northwestern Medicine conducts a background check that includes criminal history on newly hired team members and, at times, internal transfers. If you are offered a position with us, you will be required to complete an authorization and disclosure form that gives Northwestern Medicine permission to run the background check. Results are evaluated on a case-by-case basis, and we follow all local, state, and federal laws, including the Illinois Health Care Worker Background Check Act. Artificial Intelligence Disclosure Artificial Intelligence (AI) tools may be used in some portions of the candidate review process for this position, however, all employment decisions will be made by a person. Benefits We offer a wide range of benefits that provide employees with tools and resources to improve their physical, emotional, and financial well-being while providing protection for unexpected life events. Click on or copy and paste URL to your browser to view detailed benefits information NorthwesternMedicine Career Page https://jobs.nm.org/benefits Please refer to the Benefits Eligibility by Employment Classification to determine benefits eligibility for job postings. If sign-on bonus is included in a job posting eligibility is as followed: Internal employees and rehires who left Northwestern Medicine within 1 year are not eligible for the sign-on bonus. Exception : New graduate internal employees seeking their first licensed clinical position as a Registered Nurse at NM may be eligible.

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