Data Scientist

Full time

Employment Information

About the Position

Do you have a keen interest in statistics or finding and predicting variables? Are you skilled in data analysis? Come join this talented group of individuals and take your skills to the next level!

As a Data Scientist, you will develop, test, implement, verify, and deploy regression and statistical models, including automated valuation models (AVMs), to market value and identify market trends for residential, land, and commercial properties in Maricopa County. Additionally, you may apply data science techniques to other data problems within the Assessor’s Office.

About Us

Named one of Arizona’s top places to work in 2023, the Maricopa County Assessor is dedicated to ensuring their employees feel valued and appreciated. The commitment to employing professionals and providing them with state-of-the-art tools and resources to produce fair and equitable property values shows a strong commitment to serving the citizens of Maricopa County. Fair and accurate property assessments are crucial for maintaining a just and transparent system for property taxes and public services. Come and be a part of our mission to place employee satisfaction and community service at the forefront.

Proud to Offer

  • Perform work with a greater purpose
  • Opportunities for growth and development within Maricopa County
  • Tuition reimbursement
  • Exceptional work-life balance, with hybrid and alternative work schedule options
  • Low-cost, high-value healthcare for you and your qualifying dependents
  • Maricopa County participates in the Arizona State Retirement System. This defined retirement benefit requires a 12.29% monthly contribution rate and includes a 100% employer match on Day 1
  • Paid vacation, sick, and parental (birth/adoption) leaves
  • Extensive wellness program, including healthcare premium discounts
  • Employee discounts for goods and services
  • Learn more at Work With Us | Maricopa County, AZ

We Require

  • Two years of experience in mass appraisal modeling, linear regression, or Supervised Machine Learning
  • A combination of post-secondary education and/or job-related experience may substitute for the minimum qualifications on a year-for-year basis
  • Bachelor’s degree in Economics, Computer Science, Data Analytics, Statistics, Urban Planning, Business Administration, or another closely related discipline that includes statistics/quantitative analysis
  • Incumbents will be required to pass all DOR Level I courses within 15 months of employment with the Assessor’s Office

We Also Value

  • Experience in the development and deployment of linear regression models
  • Experience in mass appraisal modeling with ad valorem appraisal experience
  • Proficiency using SPSS, R, Python, ArcGIS, and/or Microsoft Power BI
  • Completion of an IAAO MAS, CAE, or RES designation, or equivalent
  • Completion of at least two appraisal modeling courses, such as IAAO 300, 311, 312, 331, 332, or 333, or equivalent

Job Contributions

  • For AVM models, specify, calibrate, test, verify, and deploy mass appraisal valuation models for residential, vacant land, and commercial properties throughout Maricopa County according to IAAO and DOR Standards for fair and equitable property values in compliance with statutory deadlines and guidelines. Models primarily developed using additive, multiplicative (log-linear), and non-linear hybrid, multiple regression techniques using sales and income approaches to value. Includes conducting Temporal Analysis on multiple years of market data to value properties as of a single-valuation date. May also include Cost Model calibration to determine if submarket adjustments are necessary
  • Develop tools and information for Appraisers, such as calculation programs and spreadsheets, depreciation schedules, etc., to assist in appraisal and data collection and analysis; e.g., develop model documentation and Time Adjusted Sales Price Schedules (TASP) using Regression Analysis and Reporting techniques
  • Provide quality control of values by producing reports, analyzing information and data, identifying, and correcting data problems, and working with appraisers to obtain additional information as necessary. Identify data quality issues within assigned models and assigned projects
  • Contribute to problem resolution by informing team members, supervisor, appraisers, and Assessor leadership of issues, and working collaboratively to redesign and re-run programs, conduct special analysis, and recommend and enact solutions
  • Work collaboratively with other members of the office to implement greater efficiencies in the operation of the office, public access to records, and accuracy of data for final valuations. May be asked to manage databases; extract and import data into applications for analysis
  • Provide feedback on data collection and acquisition; conduct and maintain data mining, predictive analytics, reporting, dashboards, and data visualization projects as needed
  • May be asked to work on other data-related projects as needed

Working Conditions

  • Most work is done in a typical office setting
  • Hybrid work environment

Selection Procedure

  • Only the most qualified candidates will be considered

  • Consideration will only be given to candidates who submit online applications

  • Candidates will be contacted primarily through email and their Workday online application profile

  • Must pass a pre-employment background and/or fingerprint investigation as required by statute or policy, including drug and alcohol testing requirements for positions designated as safety-sensitive

  • Maricopa County is an equal opportunity employer.

Pay Range

$60,500 - $93,000 annually

Salary offers are based on the candidate’s equivalent experience and internal equity with other employees within the same job classification. The position is not eligible for overtime compensation. Job Type


Join our newsletter to get monthly updates on data science jobs.