United States Postal Service
Laborer Custodial
Mark Koster in 2023 was employed at United States Postal Service and had an annual salary of $52,098, according to public records. This salary was 21 percent lower than the average and 25 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 | 2023 |
| 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 | $52,098 |
| Pay Plan | |
| Grade | 4 |
*Information may include where available: salary, bonuses, benefits, retirement contributions, pensions, and other financial data.
| Employer Name | United States Postal Service |
| Year | 2023 |
| Number of Employees | 628,799 |
| Average Annual Wage | $66,050 |
| Median Annual Wage | $69,632 |
Mark Koster (2025)Laborer Custodial | View Person Details |
Mark Koster (2024)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 (2018)Laborer Custodial | View Person Details |
Mark Koster (2017)Laborer Custodial | View Person Details |
Mark Koster (2016)Pse Laborer Cust | View Person Details |
James Marek W (2023)Laborer Custodial at United States Postal Service | View Person Details |
Theresa Bruce A (2023)Laborer Custodial at United States Postal Service | View Person Details |
Green Jr Lc (2023)Laborer Custodial at United States Postal Service | View Person Details |
Liana Rabe M (2023)Laborer Custodial at United States Postal Service | View Person Details |
Glenn Ono T (2023)Laborer Custodial at United States Postal Service | View Person Details |
Anthony Bounlangsy (2023)Laborer Custodial at United States Postal Service | View Person Details |
Jeffrey Swilley C (2023)Laborer Custodial at United States Postal Service | View Person Details |
John Kilgore C Jr (2023)Laborer Custodial at United States Postal Service | View Person Details |
Margie Carter N (2023)Laborer Custodial at United States Postal Service | View Person Details |
Willie Chisolm I (2023)Laborer Custodial at United States Postal Service | View Person Details |