Department profile
Environment: Mainly Transactional
USA Guide 2026 : Texas
Rankings
Ranked Individual
Ranked Individual
Chambers Review
Provided by Chambers
Work Highlights
Provided by Chambers
Sidley Austin represented Telephone and Data Systems in the $4.4 billion sale of United State's Cellular and Wireless Operations to T Mobile US Inc including handling the environmental due diligence and issues concerning environmental liabilities and indemnification.
Strengths
Provided by Chambers
Sidley is always available to quickly address our needs. The team has a proven track record of quality counsel and offers practical, common-sense communications.
Environment: Mainly Transactional respondentUSA
Notable Practitioners
Provided by Chambers
Band 1 
Band 1 Heather M Palmer
Heather Corken Palmer has over 25 years' experience handling compliance as well as risk management and liability issues for clients from the oil and gas, chemicals, refining, manufacturing, power and renewable sectors. Her expertise extends the area of ESG where she leads the firm's department. Heather has her finger on the pulse of the market and what other people are doing. Her insights are very valuable.
Environment: Mainly Transactional respondentUSAShe is a high-quality and knowledgeable attorney.
Environment: Mainly Transactional respondentUSAHeather combines an exceptional depth and breadth of experience with an uncanny ability to communicate effectively with the business, whether it's front line employees or the C-Suite.
Environment: Mainly Transactional respondentUSA
Ranked Individuals at Sidley Austin LLP (2)
Texas
Heather M Palmer
Environment
View profile Heather M Palmer
Environment: Mainly Transactional
View profile
Sidley Austin LLP has rankings in the following guides
Band 1 USA 2026
Practice area: Environment
Location: District of Columbia
View department profile for USA 2026Band 2
What success is built on
Chambers is the leading data and intelligence partner for the legal sector.