Since 1871

Three centuries of excellence.
Innovation is the underpinning of our work.
Ahneman Kirby is the result of the 1998 merger with J.A. Kirby (Founded in 1871) and Ahneman & Associates.


Whether civil or structural, one of the most trusted engineer firms around.


The pinnacle for surveying. Setting the standard for accuracy and speed.

Permits & Planning

Focused on devising plans that are time-saving, budget-friendly, and green-focused.

Civil Projects
Structures Evaluated
Surveys Completed
Plans Created


We serve our clients proudly with a reputation for reliability. Teamwork is the backbone of our organization. Response and follow-up are our strengths. We respond with a solution tailored to the client’s needs.

Greenwich Town Hall in the Winter


Ahneman Kirby acts as the on-call engineering firm for a multitude of Tri-State area municipalities and large contractor organizations. From engineering, to inspections, or consulting; we always deliver the best.

Ahneman Kirby, LLC is the result of a merger between two outstanding firms and traditions: Ahneman Associates started in 1988 by Edward and Thomas G. Ahneman in Greenwich, CT and J.A. Kirby Company started in 1871 by Joseph Andrew Kirby in Port Chester, New York. Joseph Kirby’s legacy includes the Boston Post Road (Rte.1) bridge that spans the Byram River at the “Gateway to New England” – the State of Connecticut Boundary.

  • J.A. Kirby’s surveys, sewer designs, road designs, and storm water designs shaped the Village of Port Chester at the end of the 19th century. Many of his maps and designs are in use today and Ahneman Kirby, LLC is the proud steward of Kirby’s records, and continues the J. A. Kirby tradition of time tested civil engineering work.
  • Ahneman Associates was a third generation civil engineer company formed by Edward Ahneman Sr.-  Ed Sr. was a civil engineer on the team that built the Kensico Dam in North White Plains, the reservoir that acts as New York City’s water supply. He was also a chief engineer overseeing the construction of New York City water supply aqueduct tunnels 5 and 5A which are still in use today.


A family-oriented firm, we are a close-knit group of professionals who can rely on each other for support and assistance during the life of a project.

Thomas Ahneman


Ida Gheibi

Senior Civil Engineer

Kristian Fontanilla

Survey Project Manager

Adam Arias

Structural Project Manager