The Civil Engineer Corps (CEC) is a
staff corps of the
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
. CEC officers are professional
engineers
Engineers, as practitioners of engineering, are professionals who invent, design, build, maintain and test machines, complex systems, structures, gadgets and materials. They aim to fulfill functional objectives and requirements while consider ...
and
architects
An architect is a person who plans, designs, and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that h ...
, acquisitions specialists, and
Seabee Combat Warfare Officers who qualify within
Seabee
United States Naval Construction Battalions, better known as the Navy Seabees, form the U.S. Naval Construction Forces (NCF). The Seabee nickname is a heterograph of the initial letters "CB" from the words "Construction Battalion". Dependi ...
units. They are responsible for executing and managing the planning, design, acquisition, construction, operation, and maintenance of the Navy's shore facilities. The Civil Engineer Corps is under the command of the Chief of Civil Engineers and Commander,
Naval Facilities Engineering Systems Command
The Naval Facilities Engineering Systems Command (NAVFAC) is the United States Navy's engineering systems command, providing the Navy and United States Marine Corps with facilities and expeditionary expertise. NAVFAC is headquartered at the Wash ...
. On 12 August 2022,
RADM Dean VanderLey relieved
RADM John W. Korka, becoming the 46th commander of NAVFAC and Chief of Civil Engineers.
Present day CEC ranks range from
CWO4 to
RADM, though the community is phasing out Chief Warrant Officer ranks in favor of
Limited Duty Officers. Several Civil Engineer Corps officers, primarily those serving during or around the time of
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, have held the rank of Vice Admiral, and one officer,
Ben Moreell, has held the four-star rank of Admiral, but there are no current billets within the US Navy that require Civil Engineer Corps officers of either rank. The worldwide CEC Active- and Reserve-Component authorized end strength is shown below.
History

Civil engineers were employed by the Navy Department as early as 1827, when Mr. Loammi Baldwin was appointed to superintendent of the construction of dry docks at Boston and Norfolk.
Prior to the passage of the Act of 2 March 1867 civil engineers were appointed by the Secretary, but under authority of that act they were to be commissioned by the President by and with the advice and consent of the Senate; they were appropriated for as part of the civil establishment at the several navy yards and stations under the control of the
Bureau of Yards and Docks until 1870.
At that time their pay was regulated by section 3 of the Act of 15 July 1870 that "fixed" the annual pay of officers of the Navy on the active list.
Appropriations for their pay have been made since 1870 under the head of "Pay of the Navy".
The discretionary authority given to the president by the Statute of 3 March 1871, to determine and fix the relative rank of civil engineers was not exercised until the 24th of February 1881, when relative rank was conferred upon them and fixed as follows: One with the relative rank of
captain
Captain is a title, an appellative for the commanding officer of a military unit; the supreme leader or highest rank officer of a navy ship, merchant ship, aeroplane, spacecraft, or other vessel; or the commander of a port, fire or police depa ...
(Capt), two with that of
commander
Commander (commonly abbreviated as Cmdr.) is a common naval officer rank as well as a job title in many army, armies. Commander is also used as a rank or title in other formal organizations, including several police forces. In several countri ...
(Cdr), three with that of
lieutenant-commander (Lcdr), and four with that of
lieutenant
A lieutenant ( , ; abbreviated Lt., Lt, LT, Lieut and similar) is a Junior officer, junior commissioned officer rank in the armed forces of many nations, as well as fire services, emergency medical services, Security agency, security services ...
(Lt).
The Navy Regulations for 1876 failed to list civil engineers among the staff officers of the Navy, and the uniform regulations for that year did not prescribe a uniform or a corps device for that class of officer. In 1881, after having had relative rank conferred upon them, civil engineers were instructed by Uniform Circular dated 24 August to wear the uniform of officers of the line with whom they had relative rank - omitting the star, but with the distinctive letters C.E. (Old English) embroidered in silver in the center. The same letters to be similarly embroidered on frogs of epaulets.
In 1905, two crossed silver sprigs, each composed of two oak leaves and an acorn (sometimes called "Crossed Bananas"), was adopted as the insignia of the Civil Engineer Corps replacing the Old English letters C.E. These were to be worn on the epaulets, shoulder straps and collar of the service coat.
While the pattern of this corps device remained the same, uniform regulations issued in 1919 specified that it was to be embroidered in gold instead of silver and worn on the sleeve of frock, evening dress, and blue service coats, above the gold lace strips, and on shoulder marks for white service coat and overcoat. By these same regulations the light blue cloth worn under the sleeve strips, and worn on the shoulder marks since 1899, was abolished as a distinction of the corps, however is still present in the light blue color of the stripes worn by enlisted, pay grades E-3 and below in the Navy's construction field.
In 1939 the CEC was composed of 126 active officers. By
VJ day that number had grown to only 200. However, there were over 10,000 reservists providing the leadership of the Construction Battalions.
In December 1941 Admiral
Ben Moreell proposed the creation of three Naval Construction Battalions. A problem then confronted BuDocks, who would command the Construction Battalions? Naval regulations stated that military command of naval personnel was strictly limited to
line officer
A line officer or officer of the line is, opposed to staff officers or reserve officers, a military officer who is eligible for command of operational, tactical or combat units. The name most likely stems from the Early modern warfare tactics ...
s, yet BuDocks deemed it essential that these Construction Battalions be commanded by officers of the Civil Engineer Corp, who were trained in the skills required for construction work. The newly formed
Bureau of Naval Personnel (BuPers), successor to the Navy's Bureau of Navigation, strongly opposed this transgression of
Naval tradition. Admiral Moreell took the question personally to the
Secretary of the Navy
The Secretary of the Navy (SECNAV) is a statutory officer () and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. On March 25, 2025, John Phelan was confirm ...
,
Frank Knox
William Franklin Knox (January 1, 1874 – April 28, 1944) was an American politician, soldier, newspaper editor, and publisher. He was the Republican vice presidential candidate in 1936 and Secretary of the Navy under Franklin D. Roosevelt d ...
, who, on 19 March 1942, gave authority for officers of the Civil Engineer Corps to exercise military authority over all officers and enlisted men assigned to construction units otherwise known as the
Seabees
United States Naval Construction Battalions, better known as the Navy Seabees, form the U.S. Naval Construction Forces (NCF). The Seabee nickname is a heterograph of the initial letters "CB" from the words "Construction Battalion". Dependi ...
. For those engineers assigned to the Seabees a silver Seabee was mounted to the center of the CEC crossed oak leaves insignia. The Seabee logo incorporated the CEC insignia, with one on each arm of the Seabee, just above each glove.
Besides providing the command leadership and engineering skills needed by the Naval Construction Force (NCF), the CEC made a major contribution to the war effort. CAPT. John N. Laycock created the Seabee's "magic box". Today's
Navy lighterage pontoon is a direct descendant of his creation.

Early in 1943 the Navy began training its first African American officers. In May,
Morehouse and
MIT
The Massachusetts Institute of Technology (MIT) is a private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of modern technology and sc ...
graduate
Edward S. Hope, was the first to enter the CEC. He went through training at Camp Endicott and was posted as the Public Works officer at Manana Barracks,
Hawaii Territory as a Lieutenant. Manana Barracks was the largest "black installation" the U.S. military had. He eventually was promoted to Lieutenant Commander which made him the Navy's highest ranking African American during WWII.
The first CEC killed in Pacific combat were Lt. Irwin W. Lee and Lt. (jg) George W. Stephenson along with 23 enlisted of the 24th CB. They died in an air raid on 2 July 1943 on
Rendova Island
Rendova is an island in Western Province (Solomon Islands), Western Province, in the independent nation of Solomon Islands, in the Pacific Ocean, South Pacific, east of Papua New Guinea.
Geography
Rendova Island is a roughly rectangular island, ...
. The Seabees named their Naval Training Center at Quoddy Village
Eastport, Maine, Camp Lee-Stephenson in honor of them.
The first CEC killed in the Atlantic combat was Lt. Carl M. Olson of St Paul, Minnesota, on 10 September 1943 at
Salerno
Salerno (, ; ; ) is an ancient city and ''comune'' (municipality) in Campania, southwestern Italy, and is the capital of the namesake province, being the second largest city in the region by number of inhabitants, after Naples. It is located ...
, Italy. His design for the landing end of pontoon assemblies was used throughout the war.
[The King Bee. Capt. A.N. Olsen (CEC), Trafford Publishing, 2007](_blank)
/ref>
* Capt. Wilfred L. Painter (CEC) was awarded four Gold Stars to the Legion of Merit (plus the Combat "V" for each of the additional stars). Lt. Painter received his first award for his leadership in the salvage of the USS California and the USS West Virginia at Pearl Harbor. For the West Virginia Lt. Painter got 120 seabees from the 16th CB to expedite the operation including pouring 650 tons of marine concrete to seal the hull.
USMC
During WWII the Seabees had a number of battalions transferred to the Marine Corps. Those battalions were then given USMC designations and the men were given standard Marine Corps issue in addition to their dress naval uniform. For CEC the standard gold and silver officer corps insignia was replaced by a brass subdued one on the garrison hat. The battalions involved were the 18th, 19th, 25th, 53rd and 121st.(see 17th Marine Regiment, 18th Marine Regiment, 19th Marine Regiment, and 20th Marine Regiment) The 31st and 133rd CBs were issued USMC fatigues and attached to the shore parties of the 4th Marine Division and 5th Marine Division for Iwo Jima
is one of the Japanese Volcano Islands, which lie south of the Bonin Islands and together with them make up the Ogasawara Subprefecture, Ogasawara Archipelago. Together with the Izu Islands, they make up Japan's Nanpō Islands. Although sout ...
. The CEC involved would have worn the subdued insignia also. Other battalions were tasked with Marine Corps shore party assignments both prior to and post-Iwo Jima.
Tasked as combat engineers
A combat engineer (also called pioneer or sapper) is a type of soldier who performs military engineering tasks in support of land forces combat operations. Combat engineers perform a variety of military engineering, Tunnel warfare, tunnel and l ...
, the CEC of the 18th and 121st CBs designed a detachable ramp mounted on a LVT LVT may refer to:
* Land value tax, a levy on the value of land
* Landing Vehicle Tracked
The Amphibious Vehicle, Tracked (LVT or AMTRAC) is an amphibious warfare vehicle and Amphibious vehicle, amphibious landing craft, introduced by the ...
-2.[Seabees and doodlebugs at Tinian, This date in Seabee History July 24, 1944, Seabee Museum website, Port Hueneme, CA /ref> Its purpose was to enable the Marines to land on Tinian's beaches bordered by coral embankments up to 15 feet high. Ten LVTs were modified using iron beams salvaged from a sugar factory on Saipan.] The commanding General Harry Schmidt was skeptical of the design. He ordered that a vehicle test one, a hundred times, before he would use it in combat. The ramps not only stood up, but they allowed the Marines to land where there were no defenses as a landing there had been thought impossible. The astonished Japanese were overwhelmed and outflanked due to the ramps. The LVTs were nicknamed "doodlebugs".
USMC Shore party commanders
*Guam: 3rd Marine Regiment, Cmdr. Wehlen CEC 3rd Battalion 19th Marines / Naval Construction Battalion 25 beaches Red 1 and Red 2
*Bougainville: 3rd Marine Division Cmdr. Brockenbrough CEC 71st CB with detachments from the 25th, 53rd, and the 75th CBs (and as well as the Marines). beaches: Blue 1,2,3 Yellow 1,2,3,4 Green 1,2 Red 1,2,3
*Iwo Jima: 23rd Marine Regiment Cmdr. Raymond P. Murphy CEC, 133rd CB beaches Yellow 1 and Yellow 2.
Naval Combat Demolition Units
Operational Naval Demolition Unit No. 1. was the very first USN "demolitions" unit. In early May 1943, a two-phase "Naval Demolition Project" was directed by the Chief of Naval Operations
The chief of naval operations (CNO) is the highest-ranking officer of the United States Navy. The position is a statutory office () held by an Admiral (United States), admiral who is a military adviser and deputy to the United States Secretary ...
"to meet a present and urgent requirement". The first phase began at Amphibious Training Base (ATB) Solomons, Maryland with the establishment of Operational Naval Demolition Unit No. 1. Six Officers and eighteen enlisted men reported from NTC Camp Peary dynamiting and demolition school, for a four-week course. Those Seabees, led by Lt. Fred Wise CEC, were immediately sent to participate in the invasion of Sicily. When the unit returned to Camp Peary
Camp Peary is a U.S. military reservation in York County near Williamsburg, Virginia, which hosts a covert CIA training facility known as "The Farm". Officially referred to as an Armed Forces Experimental Training Activity (AFETA) under the ...
most of the men were assigned to the new Naval Combat Demolition Units being formed there.
Naval Combat Demolition Units were led by junior CEC officers. There were over 200 NCDUs formed with all but five being requisitioned for the UDTs.
UDTs
V Amphibious Corps had identified coral
Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact Colony (biology), colonies of many identical individual polyp (zoology), polyps. Coral species include the important Coral ...
as an issue for Amphibious landings in the Pacific
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...
and determined Naval Constructions Battalions had the only people with any experience with the material. Lt. Thomas C. Crist CEC, from NCB 10 was in Honolulu
Honolulu ( ; ) is the List of capitals in the United States, capital and most populous city of the U.S. state of Hawaii, located in the Pacific Ocean. It is the county seat of the Consolidated city-county, consolidated City and County of Honol ...
from Canton Island
Canton Island (also known as Kanton or Abariringa), previously known as Mary Island, Mary Balcout's Island or Swallow Island, is the largest, northernmost, and , the sole inhabited island of the Phoenix Islands, in the Republic of Kiribati. It i ...
where he had been involved in a lagoon coral head
Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oce ...
clearance project. His being in Pearl Harbor turned out to be pivotal in UDT history. Admiral Turner and V Amphibious Corps were interested in dealing with coral and had identified the Seabees as the only people with any applicable knowledge. The Admirals staff learned of Lt. Crist's presence in Pearl Harbor and ordered him to report. The Admiral commissioned Lt. Crist with developing a method to blast coral under combat conditions and staging qualified men in Pearl
A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle (mollusc), mantle) of a living Exoskeleton, shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pear ...
to form a unit for that task. Lt. Crist had staged 30 officers and 150 enlisted from the 7th Naval Construction Regiment when the disaster at Tarawa happened. With Kwajalein the next operation, Lt. Crist's 180 men were used to form UDT 1 and UDT 2. Cmdr. E. D. Brewster (CEC) was selected to command UDT 1 and Lt Crist was picked for UDT 2. That did not last as Admiral Connelly wanted a commander with combat experience. So, Lt. Crist was made ops officer for team 2. At Kwajalein Ensign L. Leuhrs and Carp. W. Acheson CEC anticipated that they may not to get the intel Admiral Turner wanted just paddling a dinghy and wore swim trunks under their fatigues. They decided to strip down and go in the water in broad daylight on a hostile beach to get what the Admiral wanted. Doing that changed the UDT mission model and made them the predecessors of the Navy's special ops. Upon returning to Hawaii Lt. Crist was named as the first Training Officer of the UDT program. He was in the position only a short time when he was selected as commander of UDT 3. For the Marianas operations of Kwajelein, Roi-Namur, Siapan, Tinian, Eniwetok
Enewetak Atoll (; also spelled Eniwetok Atoll or sometimes Eniewetok; , , or , ; known to the Japanese as Brown Atoll or Brown Island; ) is a large coral atoll of 40 islands in the Pacific Ocean and with its 296 people (as of 2021) forms a legi ...
, and Guam. Admiral Turner recommended sixty silver stars and over three hundred bronze star
The Bronze Star Medal (BSM) is a United States Armed Forces decoration awarded to members of the United States Armed Forces for either heroic achievement, heroic service, meritorious achievement, or meritorious service in a combat zone.
Wh ...
s with Vs for the Seabees and others of UDTs 1-7,["America's First Frogman", Elizabeth K. Bush, Naval Institute Press, 291 Wood Road, Annapolis, Maryland, 2012, Chapt. 7,]
/ref> which was unprecedented in U.S. Naval and Marine Corps history. For UDTs 5 and 7 every officer received a silver star and all the enlisted received bronze stars with Vs for Operation Forager (Tinian).[Naked Warriors, Cdt. Francis Douglas Fane USNR (Ret.), St. Martin's Press, 175 Fifth Ave, New York, NY 10010, 1996, pp. 122, 131, ] For UDTs 3 and 4 every officer received a silver star and all the enlisted received bronze stars with Vs for Operation Forager (Guam). Admiral Richard Lansing Conolly felt the commanders of teams 3 and 4 (Lt. Crist and Lt. W.G. Carberry) should have received Navy Crosses. When UDT 3 returned from Leyte in November 1944 it became the training instructors of the Maui school and Lt. Crist was made base Training Officer again. The team would remain in these jobs until April 1945 when it was sent to Fort Pierce to do the same job there. Lt. Crist had been promoted to Lt. Cmdr. and was sent back to Hawaii but his Team 3 Seabees would train teams 12–22.
Diving masks were not common in 1944 and a few men had tried using goggles at Kwajalein.[Naked Warriors, Cdr. Francis Douglas Fane USNR (Ret.), St. Martin's Press, 175 Fifth Ave, New York, NY 10010, 1996, p. 82, ] They were a rare item in the Hawaiian sports stores so Lt. Crist and Seabee Chief Howard Roeder and put in a request to the Supply Corps for them. Fortuitously, a diving mask ad was spotted in a magazine. That prompted a priority dispatch to the States appropriating the store's entire stock.
In 1944 the Navy created an unheralded program to dredge harbors to increase accessibility and stevedoring productivity at advance bases. The 301st CB was created for the job and given two ex-NCDU (CEC) and two ex-UDT (CEC) to assist. Between them they had three Silver Stars and a Bronze Star for valor.
Prisoners of war
During WWII fifteen CEC were taken as prisoners of war
A prisoner of war (POW) is a person held captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610.
Belligerents hold prisoners of war for a ...
.[CEC WWII prisoners of war, Civil Engineering Corps History, Naval History Heritage Command, Seabee Museum Archives,Port Hueneme,C]
/ref> All were in the Pacific and all were taken at the onset of hostilities at Philippines campaign (1941–1942), Cavite, Philippines, Wake, and Guam
Guam ( ; ) is an island that is an Territories of the United States, organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. Guam's capital is Hagåtña, Guam, Hagåtña, and the most ...
. Six would die: one executed, two from friendly fire, and three from mal-treatment. One POW, Lt. Jerry Steward CEC, received the Navy Cross
The Navy Cross is the United States Naval Service's second-highest military decoration awarded for sailors and marines who distinguish themselves for extraordinary heroism in combat with an armed enemy force. The medal is equivalent to the Army ...
, Purple Heart
The Purple Heart (PH) is a United States military decoration awarded in the name of the president to those wounded or killed while serving, on or after 5 April 1917, with the U.S. military. With its forerunner, the Badge of Military Merit, ...
with three gold stars, Army Distinguished Unit Badge with Oak leaf cluster, Philippine Distinguished Service Star and was the most decorated CEC officer of WWII. Postwar he retired as a Rear Admiral
Rear admiral is a flag officer rank used by English-speaking navies. In most European navies, the equivalent rank is called counter admiral.
Rear admiral is usually immediately senior to commodore and immediately below vice admiral. It is ...
.
Camp David
The presidential retreat is officially Naval Support Facility Thurmont. The CEC staffs the base command. The Marine Corps provides base security while Seabees oversee base operations and maintenance. The current base commander is Capt. Christopher S. Casne (CEC) while the executive officer is Lcdr. Christopher L. Adcock (CEC).[Biographies, CNIC, Naval Support Facility Thurmont web page, Commander, Navy Installations Command, 716 Sicard Street SE, Suite 1000
Washington, DC 20374-514]
/ref>
*The Naval Special Warfare Command building at the U.S.N. Seal base at Fort Pierce is named for LTJG Frank Kaine CEC commander of NCDU 2.
Chiefs of Civil Engineers
Notable Seabees
* Ben Moreell
* David Robinson, NBA player who served two years active duty in the U.S. Navy with the CEC
See also
* Military engineering of the United States
The United States first formed a military engineering capability on 16 June 1775, when the Continental Congress established an army with a chief engineer and two assistants. Subsequently, on 16 March 1802, the Corps of Engineers was organized by ...
* Seabees in World War II
When World War II broke out the United States Naval Construction Battalions (Seabees) did not exist. The Military logistics, logistics of a two theater war were daunting to conceive. Ben Moreell, Rear Admiral Moreell completely understood the ...
* Underwater Construction Teams
References
External links
CEC Accessions Website
Seabee Website
Civil Engineer Corps Officer School (CECOS) Website
{{Authority control
Administrative corps of the United States Navy
Military units and formations established in 1867
Engineering units and formations of the United States military