![]() Calumet Electronics Calumet Electronics is a company that designs and manufactures printed circuit boards (PCBs). | ![]() Microwave Development Laboratories Microwave Development Laboratories (MDL) is a producer of waveguide components and subassemblies. | ![]() Wartech Engineering Wartech Engineering is a company that provides manufacturing and engineering solutions. | ![]() CS Holdings CS Holdings (CS홀딩스 주식회사, formerly known as Chosun Welding) is a company that manufactures and markets welding materials. | Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | |
Founding Date | Founding Date 1968 | Founding Date 1948 | Founding Date 2012 | Founding Date 1949 | Founding Date 1986 |
Type | Type Private | Type Private | Type Private | Type Public | Type Private |
Tags | |||||
Locations | Locations Calumet, US HQ | Locations Boston, US HQ | Locations Romulus, US HQ | Locations Pohang, KR HQ Seoul, KR | Locations Sunnyvale, US HQ Delta, CA |
Employees | Employees 1186% increase | Employees 21 | Employees 652% decrease | Employees 325% decrease | Employees 478 |
Financial | |||||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) N/A | Revenue (est.) N/A | Revenue (est.) ₩134.9b (FY, 2025) | Revenue (est.) $108m (Y, 2024) |
Operating ⚠ | |||||
Certifications and Compliance | Certifications and Compliance N/A | Certifications and Compliance 2 (Jul, 2024) | Certifications and Compliance 2 (Jun, 2024) | Certifications and Compliance N/A | Certifications and Compliance 10 (Jun, 2024) |
Facility Space, sq. ft. | Facility Space, sq. ft. 160 k (May, 2024) | Facility Space, sq. ft. 50 k (Jul, 2024) | Facility Space, sq. ft. N/A | Facility Space, sq. ft. N/A | Facility Space, sq. ft. N/A |
Industries Served | Industries Served N/A | Industries Served N/A | Industries Served 2 (Jun, 2024) | Industries Served N/A | Industries Served 8 (Jun, 2024) |
Markets | Markets 5 (May, 2024) | Markets 5 (Jul, 2024) | Markets N/A | Markets N/A | Markets N/A |
Tools | Tools N/A | Tools 3 (Jul, 2024) | Tools N/A | Tools N/A | Tools 16 (Jun, 2024) |
Types of Services | Types of Services N/A | Types of Services 8 (Jul, 2024) | Types of Services 3 (Jun, 2024) | Types of Services N/A | Types of Services N/A |

Microwave Development Laboratories (MDL) is a producer of waveguide components and subassemblies.
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Wartech Engineering is a company that provides manufacturing and engineering solutions.
View company
CS Holdings (CS홀딩스 주식회사, formerly known as Chosun Welding) is a company that manufactures and markets welding materials.
View companySierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards.
View company