Brookfield Zoo on Brink of Strike Amid Bitter Pay Dispute

CHICAGO, IL – April 29, 2026 – The beloved Brookfield Zoo Chicago faces the looming threat of a work stoppage after more than 200 of its unionized workers voted overwhelmingly to authorize a strike. The employees, members of Teamsters Local 727, rejected what the Chicago Zoological Society (CZS), the non-profit that operates the zoo, called its “last, best, and final offer,” setting the stage for a potential walkout as their current contract expires at 11:59 p.m. on May 1.

The vote throws a spotlight on a deeply contentious negotiation process, with workers demanding fair wages, secure benefits, and guaranteed staffing levels. A final bargaining session is scheduled for May 1, representing a last-ditch effort to avert a strike that could disrupt operations at one of the region's premier cultural institutions.

The Heart of the Dispute

At the core of the conflict are starkly different views on compensation and benefits. The union has publicly decried the zoo's proposal, which it states includes wage increases of less than four percent. A major sticking point is a proposed change to the workers' healthcare plan.

"To add insult to injury, the zoo's final proposal would eliminate the 100 percent employer paid union health care — something these Teamsters have earned and relied upon for decades," said John Coli Jr., Secretary-Treasurer of Local 727, in a statement.

The union's membership, which includes hundreds of animal care specialists, groundskeepers, patrol officers, and other essential staff, is also demanding guarantees on staffing levels to ensure both worker safety and the high standard of animal care the institution is known for. Their proposal reportedly includes a 20% increase in staffing across departments.

For its part, the Chicago Zoological Society has defended its offer, stating it included a "competitive 14.5% increase to wages over four years and new bonus compensation opportunities tied to the zoo's annual performance." Management claims the union's latest contract proposal would add an additional $16 million in costs over four years, a figure for which they say the union has not identified a funding source. The zoo abruptly ended a bargaining session on April 27 before presenting its final offer, a move the union has criticized as an act of bad faith.

A Tale of Two Paychecks

A significant driver of the workers' frustration is the perceived disparity between their proposed wages and the compensation of the zoo's top executive. The union has highlighted this gap as a symbol of misplaced priorities.

"Chicago Zoological Society should be ashamed for offering our hardworking members less than four percent in wage increases, while boosting their CEO's compensation over 70 percent," Coli Jr. stated. "The zoo has used our members' pride in working for an animal conservatory and love for the animals against them for years."

Publicly available financial documents lend context to these claims. According to the zoo's filings, Dr. Michael Adkesson, President and CEO of the Chicago Zoological Society, received total compensation of $839,439 in 2024. Meanwhile, the average compensation for a CZS staff member during the same period was reported to be $41,297. Data from Charity Navigator, which gives the CZS a high four-star rating for its financial health and accountability, notes a compensation ratio of 16.7, indicating the highest-paid employee earns nearly 17 times more than the average staff member. This stark contrast has become a powerful rallying cry for the union as it fights for what it calls a fair and equitable wage.

Allegations of Unfair Practices

The tension extends beyond the negotiating table and into the legal arena. The dispute has been marked by a series of Unfair Labor Practice (ULP) charges filed by Teamsters Local 727 against the CZS. There are currently eight separate ULP charges pending with Region 13 of the National Labor Relations Board (NLRB).

The allegations are serious, accusing the zoo's management of bad faith bargaining, direct dealing with employees outside of the union structure, making unilateral changes to working conditions, and engaging in retaliation and intimidation against union workers. One charge, filed on April 20, 2026 (Case Number 13-CA-385086), alleges unlawful discharge, while another from March 24, 2026 (Case Number 13-CA-383504), alleges the repudiation of the existing contract through unilateral changes. The union states it has filed a total of ten ULP charges throughout the bargaining process, painting a picture of a deeply fractured and mistrustful relationship between labor and management.

A Chicago Icon on the Brink

A strike would have significant consequences for the 235-acre zoo, which houses over 2,500 animals and typically attracts around two million visitors each year. Zoo officials have stated that they have contingency plans in place to ensure the animals receive uninterrupted care and to keep the zoo open to the public. However, a walkout by skilled animal care specialists and other key personnel could force the adjustment or postponement of certain animal encounters and educational programming.

The union has stressed its members' unwavering commitment to the animals' welfare. They have indicated that, in the event of a ULP strike, they would follow protocols established in a previous agreement to provide a minimum level of staffing to ensure all animals are fed, cared for, and safe. For the workers, the decision to strike comes with personal financial risk, though Teamsters Local 727 has a Strike and Defense Fund to provide assistance.

This labor unrest at Brookfield Zoo is not happening in a vacuum. It mirrors similar disputes at other major cultural and non-profit institutions across the country. In 2024, workers at Seattle's Woodland Park Zoo, also represented by the Teamsters, were in negotiations to avert a strike over similar concerns about low pay and high turnover. The potential for a work stoppage at a major zoo raises complex logistical and ethical questions, balancing the needs of workers with the unique demands of caring for thousands of living creatures. As the May 1 deadline approaches, the future of daily operations at the iconic Brookfield Zoo hangs in the balance.