Alyson D.Dieckman
Associate
Labor & Employment
adieckman@seyfarth.com
Aly helps employers navigate complex labor management relations matters with practical legal strategies that support workforce and business goals.
More About Alyson
Aly represents and counsels employers across the full range of traditional labor law matters, including union organizing and representation proceedings, collective bargaining and contract administration, unfair labor practice proceedings before the National Labor Relations Board, grievance and interest arbitration, and day-to-day labor relations strategy. She works closely with employers to address immediate labor law challenges while keeping their broader operational and workforce objectives in focus.
She represents employers across industries, including transportation, logistics/distribution, retail, manufacturing, health care, food and beverage, and maritime, giving her insight into the distinct operational and workforce considerations that shape labor relations in complex operating environments.
Aly also provides employment law counseling and represents employers in workplace disputes when those issues intersect with her clients’ broader labor relations needs.
She represents employers across industries, including transportation, logistics/distribution, retail, manufacturing, health care, food and beverage, and maritime, giving her insight into the distinct operational and workforce considerations that shape labor relations in complex operating environments.
Aly also provides employment law counseling and represents employers in workplace disputes when those issues intersect with her clients’ broader labor relations needs.
- JD, Marquette University Law School
- BA, Seattle University
- Washington
- Wisconsin
- US District Court, Western District of Washington
- US District Court, Western District of Wisconsin
Related Services
Related Key Industries
- Represented a national retail employer in a contested union election that produced a significant NLRB decision modifying the nationwide standard for mail-ballot elections and ultimately resulting in certification that the union was not the employees’ representative.
- Represented a maritime transportation company in a contested NLRB representation hearing, obtaining dismissal of the petition based on a finding that the petitioned-for unit was comprised entirely of statutory supervisors.
- Defended an online retailer in a lengthy unfair labor practice trial arising from a union-organizing campaign, obtaining dismissal of 12 of the 17 allegations before the administrative law judge and handling the resulting exceptions proceedings before the National Labor Relations Board.
- First-chaired the defense of a major national retailer in unfair labor practice proceedings across multiple jurisdictions, including obtaining withdrawal or dismissal of charges alleging retaliatory discharge and challenges to workplace confidentiality requirements.
- Counseled employers of all sizes through union-organizing campaigns and NLRB elections across multiple locations, including developing campaign strategy, advising management on lawful employee communications, preparing responses to representation petitions, and addressing voter eligibility and election procedures.
- Guided an employer through the successful withdrawal of union recognition following the union’s loss of majority support, including advising on the evidentiary requirements and the employer’s post-withdrawal obligations.
- Advised the purchaser of a unionized business on complex successorship issues arising from the transaction, including union recognition, initial terms and conditions of employment, and pre- and post-closing bargaining obligations.
- Negotiated collective bargaining agreements and advised employers on bargaining strategy, contract administration, grievance resolution, and implementation of negotiated terms in operationally complex workplaces.
Related News & Insights
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Firm News
Aug 20, 2026
362 Seyfarth Attorneys Recognized in 2027 Best Lawyers Rankings; Five Awarded "Lawyer of the Year"
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Legal Update
Jul 23, 2026
Loper Bright Strikes Again
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Webinar
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Legislative Update: Recent Developments Impacting Washington State Employers
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- Recognized as a "Ones to Watch" lawyer by Best Lawyers in America (Woodward/White Inc.) for Labor and Employment Law - Management (2026-2027)
- Contributing editor, "The Developing Labor Law," Bloomberg Law (2023-Present)
- Co-Author, “Loper Bright Strikes Again,” Legal Update, Seyfarth Shaw LLP (July 23, 2026)
- Co-Author, “Washington’s “Trigger” Labor Law for Private Employers,” Legal Update, Seyfarth Shaw LLP (March 17, 2026)
- Co-Author, “Washington Peculiarities: An Employer's Guide to Labor & Employment Law in the Evergreen State (2026 Edition),” Publication, Seyfarth Shaw LLP (February 4, 2026)
- Co-Author, "Washington Peculiarities: An Employer’s Guide to Labor & Employment Law in the Evergreen State (2025 Edition)," Publication, Seyfarth Shaw LLP (May 15, 2025)
- Co-Author, “Washington Amends Employee Personnel File Access Laws,” Legal Update, Seyfarth Shaw LLP (April 21, 2025)
- Co-Author, “Massachusetts PFML Update: Benefit and Contribution Rate Updates And SJC Confirms Employers Are Not Required To Continue Accrual Of Certain Benefits During PFML,” Legal Update, Seyfarth Shaw LLP (October 1, 2024)
- Co-Author, “The WA Employee Free Choice Act – Washington’s Prohibition on Mandatory Employer Meetings about Religious, Political, and Union Matters,” Legal Update, Seyfarth Shaw LLP (September 24, 2024)
- Planning committee, Pacific Coast Labor and Employment Law Conference (2022-present); Labor Subcommittee Chair (2024, 2025)
- Co-Presenter, “Legislative Update: Recent Developments Impacting Washington State Employers,” Webinar, Seyfarth Shaw LLP (March 18, 2026)
Aly helps employers navigate complex labor management relations matters with practical legal strategies that support workforce and business goals.
More About Alyson
Aly represents and counsels employers across the full range of traditional labor law matters, including union organizing and representation proceedings, collective bargaining and contract administration, unfair labor practice proceedings before the National Labor Relations Board, grievance and interest arbitration, and day-to-day labor relations strategy. She works closely with employers to address immediate labor law challenges while keeping their broader operational and workforce objectives in focus.
She represents employers across industries, including transportation, logistics/distribution, retail, manufacturing, health care, food and beverage, and maritime, giving her insight into the distinct operational and workforce considerations that shape labor relations in complex operating environments.
Aly also provides employment law counseling and represents employers in workplace disputes when those issues intersect with her clients’ broader labor relations needs.
She represents employers across industries, including transportation, logistics/distribution, retail, manufacturing, health care, food and beverage, and maritime, giving her insight into the distinct operational and workforce considerations that shape labor relations in complex operating environments.
Aly also provides employment law counseling and represents employers in workplace disputes when those issues intersect with her clients’ broader labor relations needs.
- JD, Marquette University Law School
- BA, Seattle University
- Washington
- Wisconsin
- US District Court, Western District of Washington
- US District Court, Western District of Wisconsin
Related Services
Related Key Industries
- Represented a national retail employer in a contested union election that produced a significant NLRB decision modifying the nationwide standard for mail-ballot elections and ultimately resulting in certification that the union was not the employees’ representative.
- Represented a maritime transportation company in a contested NLRB representation hearing, obtaining dismissal of the petition based on a finding that the petitioned-for unit was comprised entirely of statutory supervisors.
- Defended an online retailer in a lengthy unfair labor practice trial arising from a union-organizing campaign, obtaining dismissal of 12 of the 17 allegations before the administrative law judge and handling the resulting exceptions proceedings before the National Labor Relations Board.
- First-chaired the defense of a major national retailer in unfair labor practice proceedings across multiple jurisdictions, including obtaining withdrawal or dismissal of charges alleging retaliatory discharge and challenges to workplace confidentiality requirements.
- Counseled employers of all sizes through union-organizing campaigns and NLRB elections across multiple locations, including developing campaign strategy, advising management on lawful employee communications, preparing responses to representation petitions, and addressing voter eligibility and election procedures.
- Guided an employer through the successful withdrawal of union recognition following the union’s loss of majority support, including advising on the evidentiary requirements and the employer’s post-withdrawal obligations.
- Advised the purchaser of a unionized business on complex successorship issues arising from the transaction, including union recognition, initial terms and conditions of employment, and pre- and post-closing bargaining obligations.
- Negotiated collective bargaining agreements and advised employers on bargaining strategy, contract administration, grievance resolution, and implementation of negotiated terms in operationally complex workplaces.
Related News & Insights
-
Firm News
Aug 20, 2026
362 Seyfarth Attorneys Recognized in 2027 Best Lawyers Rankings; Five Awarded "Lawyer of the Year"
-
Legal Update
Jul 23, 2026
Loper Bright Strikes Again
-
Webinar
Mar 18, 2026
Legislative Update: Recent Developments Impacting Washington State Employers
-
Legal Update
Mar 17, 2026
Washington’s “Trigger” Labor Law for Private Employers
- Recognized as a "Ones to Watch" lawyer by Best Lawyers in America (Woodward/White Inc.) for Labor and Employment Law - Management (2026-2027)
- Contributing editor, "The Developing Labor Law," Bloomberg Law (2023-Present)
- Co-Author, “Loper Bright Strikes Again,” Legal Update, Seyfarth Shaw LLP (July 23, 2026)
- Co-Author, “Washington’s “Trigger” Labor Law for Private Employers,” Legal Update, Seyfarth Shaw LLP (March 17, 2026)
- Co-Author, “Washington Peculiarities: An Employer's Guide to Labor & Employment Law in the Evergreen State (2026 Edition),” Publication, Seyfarth Shaw LLP (February 4, 2026)
- Co-Author, "Washington Peculiarities: An Employer’s Guide to Labor & Employment Law in the Evergreen State (2025 Edition)," Publication, Seyfarth Shaw LLP (May 15, 2025)
- Co-Author, “Washington Amends Employee Personnel File Access Laws,” Legal Update, Seyfarth Shaw LLP (April 21, 2025)
- Co-Author, “Massachusetts PFML Update: Benefit and Contribution Rate Updates And SJC Confirms Employers Are Not Required To Continue Accrual Of Certain Benefits During PFML,” Legal Update, Seyfarth Shaw LLP (October 1, 2024)
- Co-Author, “The WA Employee Free Choice Act – Washington’s Prohibition on Mandatory Employer Meetings about Religious, Political, and Union Matters,” Legal Update, Seyfarth Shaw LLP (September 24, 2024)
- Planning committee, Pacific Coast Labor and Employment Law Conference (2022-present); Labor Subcommittee Chair (2024, 2025)
- Co-Presenter, “Legislative Update: Recent Developments Impacting Washington State Employers,” Webinar, Seyfarth Shaw LLP (March 18, 2026)