When Corinne and Gary Hirt founded ATI Group, LLC, formerly Accurate Testing & Inspection back in 2012, they had one goal in mind: Create a company known for its quality and integrity. Over eleven years later, they accomplished that goal and more, building one of the most successful and reputable inspection firms in the region and is currently a CPUC certified Women Business Enterprise (WBE), Small Business (SB) and Disadvantaged Business Enterprises (DBE).

Corinne’s extensive experience in human resources, business development, and management combined with Gary’s inspection and engineering experience has proven to be a recipe for success in providing value to clients while also managing day-to-day operations for a fast-growing team.

“We want our employees to feel their efforts are directly related to the successful completion of our projects,” Corinne shared.
“Our customers will know that our main objective is to provide them with the most qualified individuals who are more than just a fixture on a project, but a ‘go-to’ person.”

“We firmly believe that strong integrity in this business is the cement to a solid concrete foundation,” said Gary, “and the quality of our service is directly related to securing our next project.”

Safety. Quality. Excellence. That’s the ATI way.

As the company’s co-founder and president, Corinne built ATI Group, LLC, from the ground up and is responsible for managing the business strategy, client relationships, sales growth, and human resource development. A goal-oriented executive with extensive experience and success in leadership, management, and human resources, Corinne works diligently to develop strategic partnerships while managing ATI’s talented and growing team of 14 employees.

St John Fisher College, Rochester, NY, Master of Science, Human Resource Development

State University of New York at Oswego, Bachelor of Science, Human Resource Management

GARY HIRTPrincipal / Project Manager
A born entrepreneur, Gary started ATI with his wife, Corinne, and works as the Project Manager and Senior Quality Assurance Inspector. Gary has extensive experience in the inspection world and is well-versed in welding inspection, nondestructive testing, utility construction inspection, roofing inspection, and more for both government agencies and private organizations alike. He also takes pride in the management of project teams as well as helping individuals grow in their careers.

National Polytechnic College of Engineering & Oceaneering
2003 – 2005 Graduated with Honors, NDT Specialty

• UT Level I
• PT Level I
• PCI Level II
• MT Level I
• CWI AWS D1.2 Endorsement
• ACI Field I
• ICC Reinforced Concrete
• Structural Steel & Welding
• High Strength Bolting


When it comes to quality assurance inspections, construction project management, and more, you need experts on your side. At ATI, we guarantee that each and every project will be handled with safety, quality, and excellence in mind from start to finish. We have experience overseeing the construction of some of the largest substations and transmission line structures in Southern California, so rest assured we know what it takes to get the job done right.

From welding and structural steel to concrete and fireproofing: Whatever the scope of your project, ATI has the capability and the certifications to help you from project management to periodic observations.

  • We specialize in all aspects of construction including welding, structural steel, bolting, concrete, fireproofing, epoxy anchors, masonry, roofing, to name a few.
  • Whatever the scope of your project, large or small; ATI has the capability and the certifications to help you from project management to periodic observations.

  • We built our company on the philosophy of creating a positive and motivating work environment with the most professional and ethical employees.


STATE: State of California SB
(Micro certified ID: 1750270)
Women Business Enterprise
(CPUC certified VON ID: 14070025)
LOCAL: LBE Vendor #266437
DUNS: 078874926
DIR: PW-LR-1000530165
NAICS: 541350, 541614, 541618, 541330