One Financial Plaza, also known as "The Gold Building", in downtown Hartford. Photo courtesy of Sun Life

Civil and environmental engineering firm Fuss & O’Neill is relocating its Manchester headquarters, but it’s staying in the state where it was founded.

The 100-year-old company plans to move its head office to Hartford while adding 74 jobs in the state over the next several years.

The move is being paid for in part by $1.14 million in state tax credits contingent on those new jobs, Gov. Ned Lamont’s office said in an announcement. Fuss & O’Neill currently has around 400 workers, 200 of them in Connecticut.

Decamping to Hartford “aligns with our mission, our work, and our client base,” Fuss & O’Neill CEO Kevin Grigg said in a statement provided by Lamont’s office. In addition to work on private-sector projects, the company was notably involved in the new Beehive Bridge in New Britain, maintaining Hartford’s flood control system and the Science Park development in New Haven.

“We have purposefully relocated and opened new offices in urban areas, always seeking environments that inspire innovation and attract top talent,” he said. “This is an exciting new chapter for our firm as we celebrate our centennial anniversary.”

The company’s new Hartford office will take up 23,000 square feet in in Hartford’s Gold Building and will open this fall. The building, owned by a joint venture of major downtown landlord Shelbourne and LAZ Parking, has attracted several other marquee office tenants in recent years, including insurer Sun Life’s 47,000-square-foot relocation from Windsor.

“Connecticut has the best trained and most skilled workforce in the country, which is why our state is an ideal place for Fuss & O’Neill to expand its operations,” Lamont said in a statement. “This highly respected engineering firm employs hundreds of people in good paying jobs in several states, and I am glad that the company has chosen our state as the location to add to its employee base. I look forward to their continued growth here.”