The candidate will design experiments and use instruments and tools for aerosol and bioaerosol generation, measurement, characterization, and modeling. Examples of job responsibilities include the following: + Aerosol/bioaerosol generation, sampling, and analysis; data reduction and interpretation + Physical and/or non-dimensional modeling of mechanical and aerodynamic contaminant surface detachment, transport, and dispersion into boundary layer flows using a wind tunnel, an environmental control chamber, and/or articulated manikins + Characterization of transport and deposition of particles + Use of techniques including optical spectroscopy, UV fluorescence, laser Doppler and phase Doppler velocimetry, and various light-scattering instruments for aerosol measurement and characterization + Development and validation of novel methods to meet specific project objectives. + Managing tasks and budgets of projects. + Write, update, and follow standard operating procedures as necessary; write quality assurance documents for projects; and develop project reports, manuscripts (including peer-reviewed), and presentations. Must comply with all company policies, procedures, and appropriate regulations. The candidate will assist in the day-to-day operation of EPA-owned facilities including wind tunnels, aerosol testing facilities, and associated laboratories. The candidate will support facility maintenance, maintain records, set schedules, and perform equipment and instrumentation preventive maintenance and calibrations. He or she will troubleshoot operations and report findings. The candidate will research and provide information and recommendations on test equipment and instrumentation and will assist in evaluation and verification of aerosol test equipment. The candidate will perform facility quality assurance tasks as required. He or she will write standard operating procedures for facility and instrumentation maintenance, calibration, and operation. He or she will follow quality assurance procedures and standard operating procedures and document all work performed. The candidate will provide operational and logistical support for aerosol and bioaerosol experiments including setting up and testing equipment, performing experiments, collecting samples, and conducting microscopy and fluorescence measurements. The candidate will determine purchasing needs, maintain inventories of spare parts, communicate with vendors, and prepare purchasing paperwork for facility materials and supplies. He or she will maintain equipment inventory spreadsheets and databases and assist with annual equipment inventory reconciliation. This position requires laboratory work in a facility with stairs, and the candidate must be able to climb stairs. The candidate must be able to lift a minimum of 35 lbs. The candidate must be able to wear a N95 or N100 respirator. Use of laser-based scientific instruments is required. Safety training and appropriate personal protective equipment will be provided. Annual medical monitoring is required and provided by the company. U.S. citizenship is required. The candidate must be able to pass a background check and might be required to obtain a security clearance of an appropriate level. He or she must comply with all company policies, procedures, and appropriate regulations. Minimum Qualifications: Master’s degree in chemistry, biology, physics, engineering, atmospheric science, or related field and 6+ years of experience in aerosol and/or bioaerosol research. Knowledge of aerosol physics and fluid dynamics including fate and transport, deposition, and resuspension of particles. Knowledge of aerosol and bioaerosol samplers, aerosol generation/distribution equipment, and laser-based measurement systems. Preferred Qualifications: Experience providing oversight and services for operational equipment such as wind tunnels, aerosol exposure chambers, or environmental chambers is preferred. Two or more years of Project Management experience, including tracking financial and project deliverable information. The candidate must be self-motivated and have strong problem-solving, leadership, communication, organizational, analytical, and critical-thinking skills. The ability to multi-task and interact constructively with staff, QA personnel, and the customer is essential. Must be proficient in Microsoft Office Excel and Word. Coding with R and/or Python is a plus. U.S. citizenship is required. The candidate must be able to meet background check requirements and may require a security clearance of an appropriate level. **ESSENTIAL** **FUNCTIONS** Unusual or Special Physical Requirements of Position Examples: Specify % of Time • Lifting • Climbing • Crawling • Special clothing/equipment (wearing) • Unusual physical requirements • High noise level • Other 35 lbs. 5% of time Respirator (N95, N100, or PAPR) 10% of time 96 dB 10% of time Description of Work Environment Examples: Specify % of Time • Inside? Outside? Where • Combination of above • Extreme (hot/cold) temperatures involved • Hazardous conditions - What are they • Travel/transportation requirements • Other Inside laboratory Equipment and Machines Involved in Work Tasks Examples: Specify % of Time • Office equipment/machines electrically/battery operated - which? • Vehicles, forklifts, etc. operated which? • Tools used in trade - which ones? • Other Electrically operated computers and office equipment Aerosol generators, aerosol samplers/monitors, laser- based particle measurement instruments Criticality of Attendance Examples: Specify % of Time • Overtime, regular days, off days • Shift, 2nd, 3rd • Necessity for regular attendance • Urgency for punctuality Mon-Fri 1 st Regular attendance required Other Essential Functions List other essential functions here. Must be able to pass a drug screen. Must be able to obtain and maintain a security clearance.