The phrase "proudly work" is correct and usable in written English.
You can use it to describe someone who is proud of the work they are doing. For example, you could say "She proudly works for a local charity."
She had been proudly working since she was 15, when she had a job as a coat-check girl.
He proudly works to maintain what defensive end Justin Tuck called (with only a hint of envy) a "total beach body".
From 1989 until the end of her life, she proudly worked for the Manhattan Institute for Policy Research, primarily as program director.
Very importantly I would like to pay a special tribute to the academy where I proudly worked along with others for the best part of six years.
Joe proudly worked with many charity organizations, attaining the rank of 3rd degree within the Knights of Columbus, a Knight of the Order of the Holy Sepulcher and a former President of the Friends of Mercy.
Mr President, I have admired your efforts to bring health services and development to your people, and the Elton John Aids Foundation has proudly worked with the government of Malawi to these ends since 1998.
My mother's father was a successful middle class merchant — a butcher — who proudly worked six days a week in his butcher shop, retiring at age 84 when his right-hand man of 50 years decided to call it quits at age 78.
A1 Terror Witness Cross-Examined Jamal Ahmed al-Fadl, a government witness who was once a close aide to Osama bin Laden, testified in the embassy bombings trial that he had proudly worked for Mr. bin Laden against the United States, but later acknowledged telling American agents that Mr. bin Laden "misinterprets certain portions of the Koran to justify violent action".
How can the Capitol, where my dad proudly worked for so many years, hold its allure when the occupants have spent their days — and years — bickering and scoring petty political points instead of stopping White House chicanery and taking on risky big issues?
"As an aide in the Obama White House, I proudly worked to help pass Obamacare because I knew it would save lives," Campoverdi said to the camera.
