![](https://www.hollyconst.com/wp-content/uploads/2023/01/logo_Buckeye.jpg)
![](https://www.hollyconst.com/wp-content/uploads/2023/01/logo_Marathon.jpg)
![](https://www.hollyconst.com/wp-content/uploads/2023/01/logo_Sunoco.jpg)
ALL UNION CONTRACTOR
- Pipeliners – Local 798
- Pipefitters – Local 636
- Plumbers – Local 98
- Ironworkers – Local 25
- Operating Engineers – Local 324
- Teamsters – Local 247
- Electricians – Local 58
- Laborers – Local 1191
- Carpenters – Local 687
- Boilermakers – Local 190
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_bp.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_swissport.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_dte.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_enbridge.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_Tetra-Tech.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo-wsp.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_energy-transfer.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_Ford.png)
![](https://www.hollyconst.com/wp-content/uploads/2023/02/logo_wolverine.png)