P. Derek "Derek" Petersen

4.6 (7 reviews )

Phoenix Arizona United States

Litigation - Environmental

Recognized Since Recognized in Best Lawyers since 2018

602-351-8000 Website

About P.

P. Derek Petersen is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Environmental.P. Derek, who practices law in Phoenix, Arizona, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which P. Derek is held by other top lawyers in the same geographic and legal practice area.

P. Derek Petersen is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Environmental.P. Derek, who practices law in Phoenix, Arizona, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which P. Derek is held by other top lawyers in the same geographic and legal practice area.

P. Derek Petersen is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Environmental.

P. Derek, who practices law in Phoenix, Arizona, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which P. Derek is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Litigation - Environmental

Education

Arizona State University

Awards & Recognition

Reviews

4.6 / 5

0 Reviews

1,004 Profile Views

Amara Okonkwo

Jan 05, 2026

Always Available and Kept Me Fully Informed Throughout

As a small business owner facing an environmental compliance dispute, I was overwhelmed. Derek Petersen's responsiveness was exceptional. He answered my calls and emails promptly, even on weekends, an...

Henrik Johansson

Jan 05, 2026

Unmatched Knowledge of Environmental Regulations and Litigation

Our manufacturing company was sued for alleged groundwater contamination. Derek's expertise in environmental law was immediately apparent. He demonstrated deep understanding of both federal and Arizon...

Yuki Nakamura

Jan 05, 2026

Secured a Life-Changing Settlement for Our Community

When our neighborhood discovered toxic waste dumping nearby, we turned to Derek Petersen. He fought tirelessly against a large corporation. The result? A $2.8 million settlement that funded comprehens...

Fatima Al-Rashid

Jan 05, 2026

Showed Genuine Care During Our Most Difficult Time

After my husband's illness was linked to industrial pollution, we were devastated. Derek handled our case with remarkable compassion. He listened patiently to our story, validated our emotions, and tr...

Diego Alvarez

Jan 05, 2026

The Epitome of Professional Excellence in Phoenix

As CEO of an energy company, I've worked with many attorneys. Derek Petersen stands out for his impeccable professionalism. His reputation among peers is well-deserved—I've heard other lawyers speak h...