
He was then placed in the unit directed by Bob McKimson to make both backgrounds and layouts. McKimson derisively said his unit was full of “drunks and queers” (McKimson employed Bob Givens as a layout artist and Givens was neither). McKimson related to historian Mike Barrier: “I had a layout man—he was a very good layout man—who was a queer, and a background man at the same time who was a queer, and they were just at each other's throats all the time. So finally I had to get rid of the background man.” (The background man in question had worked at Disney).
I posted about Gribbroek some years ago on the GAC Forum (R.I.P.) and thought I had reposted it here. After writing this post, I discovered I had posted parts of it in 2023. So here it is, with some additional material.
When he arrived at the Warners studio is yet to be discovered, but Gribbroek’s picture is with the rest of the cartoon staff in the April 1945 edition of the Warner Club News. The following month, the studio paper mention him and others in the Screen Cartoonists Guild with a slide presentation on world peace. In the June issue (which reports Art Davis had taken over the Clampett unit with George Hill and Hubie Karp handling stories), it is mentioned he played in the cartoon division’s tennis championship.
Gribbroek first got screen credit in Jones’ Hare Conditioned, released August 11, 1945 when the studio finally credited layout and background people. Whether he left Warners and came back isn’t clear, but he painted backgrounds on Republic Pictures’ brief series of Jerky Journeys released in 1948-49.

Gribbroek worked for Jones for several shorts—one of the cartoons he laid out was One Froggy Evening—before moving over to McKimson to fill the layout job. He stayed with the studio until the end, though he career was interrupted when his car was broadsided in June 1959 (Taos News, Aug. 27, 1959) and again by broken bones when his car hit stump on a mountain road near Glendale (Taos News, Nov. 3, 1960). He provided backgrounds for the final Bugs Bunny cartoon, False Hare, released July 16, 1964. Gribbroek painted some backgrounds for the Hanna-Barbera feature Hey There, It's Yogi Bear. Jones then hired him to work on several Tom and Jerrys for MGM before he retired from animation and left California.
He was born March 16, 1906 in Rochester, New York, to Edward Garret and Ada C. Gribbroek (they divorced in 1923). His father was a grocer. The book Representative Art and Artists of New Mexico (originally published in 1940) states he studied at the P.A.F.A. and Rochestra Athenaeum and with Emil Bisstram in Taos. When he actually arrived in New Mexico is unclear. It would seem he split his time there and in Rochester. The Taos News of Jan. 26, 1971 stated he first came to New Mexico in 1929. In 1935, he belonged to the Rochester Art Workers and his paintings and commercial art were exhibited. The 1940 Rochester city directory still lists his name, but the 1940 Census has him in Taos (giving his occupation as “artist and draftsman”). His 1940 draft card has him employed by the New Mexico State Assessment Survey. His address is crossed out an a Hollywood address substituted; his name appears in the 1942 Los Angeles Directory.
The Albuquerque Journal included several mentions of Gribbroek in the second half of the 1930s.
June 14, 1935
Bob Gribbroek, who was one of the first to establish the Isleta art colony which since has quietly died, is returning in August, we hear, to stay in New Mexico a year or more . . . . he was a commercial artist in Rochester, Minn. [sic]
Oct. 12, 1935
Bob Gribbroek returns to town from Rochester, N. Y., and will spend the winter in Isleta, painting . . . will occupy the same Indian house he and Cory took three years ago . . . you know Bob by his tiny beard and his height . . . Paul Robinson, dilettante in many arts, is with him, en route to California from the east.
July 21, 1936
... a part of summer Taos is the University of New Mexico art class, 20 students this year, headed by Dorothea Fricke and including Martin Shaffer and Robert C. Gribbroek whom we know here.
Feb. 19, 1937
Bob, incidentally, plans to get to New Mexico and Taos [from New York City after a trip to Florida] as soon as legal matters are adjusted in Rochester, N. Y., sometime after the first of April.
Jan. 5, 1938
Ada Gribbroek went up to Taos to visit her son Bob from Rochester in September en route to California .... fascinated by the village life she is still in Taos .... came down to move his furniture from Isleta to Bob's new studio home in the art colony .... several years ago Bob started a little colony of his own in Islata and startled the Indians with his ideas on interior decorating .... Bob, merciless satirist, tells us a Country Club crowd has started up in Taos.
Oct. 19, 1938

Jan. 28, 1939
The most elaborate winter sports show of the season, to be climaxed by a leap through a hoop of fire from a 80-foot ski jump, will be held at Agua Piedra near Tres Ritos in the Carson National Forest Sunday, Taos Winter Sports Club officials, sponsors of the carnival, announced Friday night.
Reno Du Pasquier, Swiss ski pro who has maintained classes in New Mexico this season, will make the famed fire leap. Du Pasquier is also slated to give a first aid demonstration on skis and a demonstration showing the advantage of skis over other methods of traveling on snow.
With many club members of the Taos art colony, an added attraction of the program will be a unique exhibition of snow sculpturing by Bob Gribbroek, carnival officials said.
Sept. 25, 1939
Bob Gribbroek took a recent completed mural down to Albuquerque last week-end to be used in the State Fair opening last Sunday. (Santa Fe New Mexican)
Nov. 7, 1940
Bob Gribbroek, artist, is continuing nicely in his career up at Taos, where he moved after gracing local scenes for a while . . . 20 of his drawings will comprise a one-man show at the Rundell Gallery in Rochester, N. Y., his former home town, this month . . . one of his non-objective works is hanging at the Guggenheim Museum in New York City.

And he was an accomplished cook, as several stories from 1959 mention. Unfortunately, there's no Duck au Gratin Under Tooled Leather:
HONOLULU, Dec. 5 (UPI) - A bachelor whose avocation is cooking defeated four other single men and 20 husbands in a contest to choose the nation's leading male backyard barbecue chef.
Robert G. Gribbroek, Los Angeles, accomplished this with an original recipe for a skewer specialty he called pork tenderloin Javanese.
His $10,000 cash first prize could well help him to future cooking honors. Gribbroek said in an interview that he plans to use the prize money to help build a new home with the kind of modern, well-equipped kitchen any cook, man or woman, would love to work in.
The combination of cooking skill and new home qualifies the handsome, 53-year-old 6-foot 2 inch bachelor for another title: most eligible male.
But Gribbroek indicated that he's satisfied with the status quo.
His job as a layout artist with Warner Brothers' cartoon division keeps him too busy to think of marriage. Too busy even for cooking, except on special occasions, he added.
His mother, who acts as his housekeeper, presides at the kitchen stove except at party time.
Then, Gribbroek steps up to his outdoor grill or kitchen range to prepare such exotic dishes as the one that captured first prize in the (Kaiser/Foil) cookout championship.
Here's the prize-winning recipe:
Cut 2 pounds of pork tenderloin into 1-inch cubes, combine 6 Brazil or macadamia nuts, grated, 1 cup of minced onion, 2 garlic cloves, minced, 1-4 cup each of lemon juice and soy sauce, 2 tablespoons each of brown sugar and ground coriander, 1-4 tea spoon of crushed red pepper of chili powder and 1-4 cup of olive oil. Marinate pork cubes in this mixture 10 minutes.
Place pork on skewers and grill over hot coals about 10 minutes on each side. Present skewers on heated serving dish and garnish with contents; of one 12-ounce jar of preserved kumquats and fresh orange leaves or parsley. Serves 4 to 6.
Gribbroek usually serves the meat flaming with cointreau, an orange-flavored liqueur.
By STAN DELAPLANE
Arizona Republic [Syndicated column published Nov. 24, 1959]
HONOLULU—Have been interviewing Mr. Robert Gribbroek beside the beach at Waikiki this morning. We found him happy.
Mr. Gribbroek is the new world's champion backyard barbecue chef. He won over 24 final contestants in Mr. Henry Kaiser's elegant backyard at the Hawaiian Village—a happy $10,000. (Unhappily, it will be reduced to some $6,000 by the happy tax collector.)
He won in a last-minute finish with a skewered pork tenderloin dish called "Pork Tenderloin Javanese."
It was a win to make any red-blooded suburb chef proud. (I am a suburb-backyard chef, and I was proud.)
"When we lined up behind our grills, we discovered that all my ingredients had been lost," said the champion.
* * *

Mr. Gribbroek is a bachelor and had no wife to beat, a terrible handicap.
The contest started at 10:30 in the morning.
Each cook had enough for three tries—except Gribbroek, who stood around moodily slicing a piece of borrowed garlic. The finish time was 3:30 and Gribbroek got under the wire at 3:15!
"They were unable to furnish Brazil nuts," he said. "But I agreed to settle for Hawaiian macedamia [sic] nuts, which are about the same."
In this catastrophe, Gribbroek stood firm. All around him the fires were blazing and the smell of completed entries rose richly to the coco palms.
Gradually ingredients arrived by panting messenger.
* * *
HE SKEWERED his trimmed pork tenderloin bits on little fencing foil skewers that he brought with him.
"What is the marinade, please?"
"A little lemon juice, brown sugar, coriander—it's a natural for pork. A little olive oil and a little chili and soya sauce [sic]. I garnished with preserved kumquats and some lime leaves and served on a plain white Japanese platter."
Gribbroek was ready to go with a curried rice, cooked in chicken broth, on the side. But losing his food and time upset him.
"I couldn't control the heat and the rice came out too soft."
Reluctantly, he withdrew it and sent in the skewered pork alone.
It won.
* * *
"I'M REALLY not much of a barbecue chef," said the barbecue champion, frankly. "At home when I throw a party, I usually cook on the stove."
Now that is what I have been trying to tell those eggheads in my neighborhood.
This keeping up with the Joneses barbecue has got to stop.

We learn of his life after MGM from the News of Aug. 13, 1970:
Former Taos artist Robert (Bob) Gribbroek, is back in Taos, after returning from Barcelona and Sitges, Spain, where he has lived since 1965. While there he worked on an animated feature film and as actor in TV commercials and four feature films.
The News reported on Oct. 22, 1970 he was working three days a week at an art gallery and on June 16, 1971 he had been appointed production manager of the Little Theatre of Taos. He didn’t enjoy it long. Gribbroek died Oct. 13, 1971.