Company type | Private |
---|---|
Industry | Construction, staffing, defense |
Headquarters | Philadelphia, Pennsylvania , United States |
Area served | Worldwide |
Key people | Harold L. Yoh III (Chairman & CEO) |
Revenue | US$2.7 billion (2023) |
Owners | Hal, Mike and Bill Yoh [1] |
Number of employees | 43,000 [2] |
Subsidiaries | Yoh Services |
Website | dayzim |
Day & Zimmermann is a privately held company in the fields of construction, engineering, staffing and ammunition manufacture, operating out of 150 locations worldwide. Its corporate office is in Philadelphia, Pennsylvania.
Day & Zimmermann has an annual revenue of $2.5 billion, and is ranked by Forbes as one of the largest privately held companies in the United States. [3] One of America's leading producers of ammunition, the company operates several government-owned facilities. In the 2011 financial year, it worked on 351 US Army contracts worth 151.8 million dollars. [4]
The company was founded in 1901 by Charles Day and Kern Dodge, son of James Mapes Dodge, as Dodge & Day, [5] specializing in engineering, shop equipment and management. [6] Later, the scope of the organization was enlarged to include a great deal of engineering and construction work in both the industrial and public-service fields. [7]
In 1907 another former classmate John Zimmermann joined the firm as partner, and they renamed the firm Dodge, Day & Zimmermann. After Kern Dodge withdrew as partner in 1911 the firm became Day & Zimmermann, incorporated in 1916, [8]
In its early years the company came into prominence with the design of the construction of the Gatun Lock System, one of the Panama Canal locks in 1907. The construction of the Gatun Lock began with the first concrete laid at Gatun, on August 24, 1909, by Day & Zimmermann.[ citation needed ] In 1914, the company was contracted by the Hershey chocolate company to produce the foil wrapping machines for Hershey's Kisses. [9]
In 1961, Day & Zimmermann and Yoh Company merged, with Harold L. Yoh becoming president of Day & Zimmerman. In the early 1970s it assisted in the construction of Veteran's Stadium in Philadelphia.[ citation needed ]
In 1976, Spike Yoh bought the company from his father and was the CEO for twenty-two years. He graduated from Duke University and one of Duke's facilities is named Duke's Yoh Football Center. In 1998, his son, Hal Yoh, became the company's leader. In that year Day & Zimmermann was the recipient of the National Family Business of the Year award. [10]
Day & Zimmermann is responsible for supplying much of the artillery munitions used by Israel in its ongoing invasion of Gaza. In particular, it manufactures 155mm rounds, fired by M109 howitzer guns, and 120mm M830A1 High Explosive Anti-Tank (HEAT) rounds, fired by Israel's Merkava battle tanks. [11] [12] The American Friends Service Committee says that Merkava tanks fired M830A1 rounds in a November attack on a UN school in Gaza, and in the attack that killed Hind Rajab, and that serial numbers on shells recovered at the scene suggest that the shells were made by Day & Zimmermann subsidiary Mason & Hanger. [13]
The Merkava is a series of main battle tanks used by the Israel Defense Forces (IDF) and the backbone of the IDF's Armored Corps. Current iterations of this tank are considered broadly equivalent to the capabilities of the M1 Abrams, Leopard 2 and the Challenger 2. The current iteration of this vehicle also shares the same MTU EuroPowerPack powerplant as a number of other MBT platforms.
The MBT-70 was an American–West German joint project to develop a new main battle tank during the 1960s.
The IDF Caterpillar D9 — nicknamed Doobi — is a Caterpillar D9 armored bulldozer used by the Israel Defense Forces (IDF). The Israeli armored CAT D9 was heavily modified by the Israel Defense Forces, Israeli Military Industries and Israel Aerospace Industries to increase the survivability of the bulldozer in hostile environments and enable it to withstand heavy attacks, thus making it suitable for military combat engineering use. The IDF Caterpillar D9 is operated by the Israel Defense Forces (IDF) Combat Engineering Corps for combat engineering and counter-terrorism operations.
The Israeli Combat Engineering Corps is the combat engineering forces of the Israel Defense Forces.
Canister shot is a kind of anti-personnel artillery ammunition. Canister shot has been used since the advent of gunpowder-firing artillery in Western armies. However, canister shot saw particularly frequent use on land and at sea in the various wars of the 18th and 19th century. Canister is still used today in modern artillery.
The 401st "Iron Tracks" Brigade is an Armored Brigade in the 162nd Division of the Israeli Defence Forces (IDF).
Trophy is a military armored vehicle active protection system (APS) designed by Rafael Advanced Defense Systems.
The Rheinmetall Rh-120 is a 120 mm smoothbore tank gun designed and produced in former West Germany by the Rheinmetall-DeTec AG company, it was developed in response to Soviet advances in armour technology and development of new armoured threats. Production began in 1974, with the first version of the gun, known as the L/44 as it was 44 calibres long, used on the German Leopard 2 tank and soon produced under license for the American M1A1 Abrams and other tanks. The 120-millimetre (4.7 in) gun has a length of 5.28 metres (17.3 ft), and the gun system weighs approximately 3,317 kilograms (7,313 lb).
Al Mat'haf is a small, private museum in Gaza City, Palestine, focused on archaeology of the Gaza Strip. The museum is part of a privately owned hotel, also named Al Mat'haf, that includes a restaurant and conference center; both the hotel and its small museum opened to the public in the fall of 2008. The privately owned museum houses antiquities discovered in the Gaza Strip from various historical periods. The museum is owned by the businessman Jawdat N. Khoudary, who owns a series of construction companies in Gaza.
Yoh Services LLC is an American talent and outsourcing company that is headquartered in Philadelphia, Pennsylvania. Yoh's primary services include temporary placement, direct hire, managed staffing services and outsourced solutions.
The Iowa Army Ammunition Plant (IAAAP), located in Des Moines County in southeastern Iowa, near the city of Burlington, produces and delivers component assembly, and medium- and large-caliber ammunition items for the United States Department of Defense using modern production methods in support of worldwide operations. The facility is part of the US Army Joint Munitions Command.
Namer, means "leopard" and also a syllabic abbreviation of "Nagmash" (APC) and "Merkava", is an Israeli armoured personnel carrier based on a Merkava Mark IV tank chassis. Namer was developed by and is being assembled by the Israeli Ordnance Corps. It has entered service in limited numbers with the Israel Defense Forces since the end of 2008. Due to budgetary constraints, the introduction of the Namer into the IDF has been slow, leaving the ground forces dependent on the M113 until 2027.
This article deals with the history and development of tanks of the Israeli Army, from their first use after World War II in the establishment of the State of Israel after the end of the British Mandate, and into the Cold War and what today is considered the modern era.
The post–Cold War era is the period in world history from the collapse of the Soviet Union on December 27, 1991 to the present. During the Cold War, the Soviet domination of the Warsaw Pact led to effective standardization on a few tank designs. In comparison, France, Germany, the United States, and the United Kingdom had previously developed their own tank designs, but now tried to standardize their designs, while the smaller nations of NATO purchased or adapted these designs.
James Mapes Dodge was an American mechanical engineer, inventor, industrialist and president of the American Society of Mechanical Engineers in the year 1903–1904. He is known as president of the Link-Belt Company, and as pioneer of applying scientific management methods.
Charles Day was an American electrical, construction and consulting engineer, and co-founder of Day & Zimmermann. He is known as a specialist in public utility management and operation, and for his seminal contributions to flow charts and the routing diagram.
Conrad Newton Lauer was an American mechanical engineer, general manager at Day & Zimmerman, Inc., chairman of the Philadelphia Gas Works Co., and 51st president of the American Society of Mechanical Engineers in 1932–33.
The Israeli Ground Forces are the ground forces of the Israel Defense Forces (IDF). The commander is the General Officer Commanding with the rank of Major General, the Mazi, subordinate to the Chief of General Staff.
120×570mm NATO tank ammunition, also known as 120×570mmR, is a common, NATO-standard, tank gun semi-combustible cartridge used by 120mm smoothbore guns, superseding the earlier 105×617mmR cartridge used in NATO-standard rifled tank guns.
Hind Rajab was a five-year-old Palestinian girl from the Tel al-Hawa neighbourhood in Gaza City who was killed by the Israeli military, after being the sole survivor of Israeli tank fire on the vehicle in which she had fled with six relatives.