United States Postal Service
Laborer Custodial
Mark Koster in 2018 was employed at United States Postal Service and had a reported pay of $33,589, according to public records. This pay was 43 percent lower than the average and 45 percent lower than the median salary in United States Postal Service.
United States Postal Service records show Mark Koster held two jobs from 2016 to 2025. From 2017 to 2025 Mark Koster held job of Laborer Custodial.
| Year | 2018 |
| Full Name | Mark Koster |
| Job Title | Laborer Custodial |
| Get Laborer Custodial Salary Statistics | |
| State | Federal |
| Employer | United States Postal Service |
| Location | IL - ARLINGTON HGHTS |
| Annual Wage | $33,589 |
| Grade | 04 |
*Information may include where available: salary, bonuses, benefits, retirement contributions, pensions, and other financial data.
| Employer Name | United States Postal Service |
| Year | 2018 |
| Number of Employees | 633,992 |
| Average Annual Wage | $59,052 |
| Median Annual Wage | $60,815 |
Mark Koster (2025)Laborer Custodial | View Person Details |
Mark Koster (2024)Laborer Custodial | View Person Details |
Mark Koster (2023)Laborer Custodial | View Person Details |
Mark Koster (2022)Laborer Custodial | View Person Details |
Mark Koster (2021)Laborer Custodial | View Person Details |
Mark Koster (2020)Laborer Custodial | View Person Details |
Mark Koster (2019)Laborer Custodial | View Person Details |
Mark Koster (2017)Laborer Custodial | View Person Details |
Mark Koster (2016)Pse Laborer Cust | View Person Details |
Damontae Griffin (2018)Laborer Custodial at United States Postal Service | View Person Details |
Stephanie Foley L (2018)Laborer Custodial at United States Postal Service | View Person Details |
Kami Baker (2018)Laborer Custodial at United States Postal Service | View Person Details |
Jordan Brooks (2018)Laborer Custodial at United States Postal Service | View Person Details |
Anthony Thompson L (2018)Laborer Custodial at United States Postal Service | View Person Details |
Michael Siverly I A (2018)Laborer Custodial at United States Postal Service | View Person Details |
John Hroscikoski (2018)Laborer Custodial at United States Postal Service | View Person Details |
Akomabou Edah M (2018)Laborer Custodial at United States Postal Service | View Person Details |
Theresa Bruce A (2018)Laborer Custodial at United States Postal Service | View Person Details |
Kristy Brommel L (2018)Laborer Custodial at United States Postal Service | View Person Details |