EnergySec staff and leadership have extensive industry experience and expert knowledge in cybersecurity.


Steven Parker


Steven Parker, CISA, CISSP, is a founding director of EnergySec. He has been engaged in critical infrastructure protection within the electric sector for more than 14 years, including eight years as a senior security staff member at a large west coast utility. He was also one of the original NERC CIP auditors for the WECC region. He has been with EnergySec full-time since 2010.

Stacy Bresler

Vice President

Stacy Bresler is a founding director of EnergySec. Mr. Bresler has served as cybersecurity manager for PacifiCorp, with previous experience at U.S. Bancorp, Hewlett-Packard, Conoco Oil and Chevron. He was also part of the team of NERC CIP auditors that helped establish the regional reliability audit program. He has devoted the past 15 years to the electric sector cybersecurity profession.

Twila Denham

Managing Director, Operations and Workforce Development

Twila Denham is a talented educator and administrator with nearly 30 years of experience in education, most recently as the Principal and Administrator for a K-12 private school. She holds a B.A. in Education and Biblical Studies. Twila joined EnergySec full-time in July 2015 to lead our workforce development programs.

Senior Staff

Sean Maloney

Security Architect

Sean Maloney is a talented software developer and security technologist. He has previously worked at PacifiCorp where he was a primary developer and architect of several internal security tools. He has been with EnergySec since 2012 and supports all of our technology systems and related initiatives.


Brandon Workentin

Cybersecurity Analyst II

Brandon Workentin specializes in cybersecurity. His role includes compiling our weekly security newsletter, drafting various publications, and participating in our ISAO efforts. As a former school teacher, he holds a B.A. in Mathematics and English Education, as well as an AAS in Cybersecurity and Networking.

Andrew Zambrano

Cybersecurity Analyst

Andrew Zambrano joined EnergySec after a successful internship in 2015. He recently received an AAS in Cybersecurity and Networking and also holds an AA in General Education. Andrew is a five-year veteran of the U.S. Marine Corps.

Kim Zimmerman

NERC CIP Specialist

Kim Zimmerman joined EnergySec in early 2015 after internships at both EnergySec and Portland General Electric. She holds an AAS in Cybersecurity and Networking. Kim focuses her time on NERC CIP, attending numerous industry events and assisting with the publication of our CIP Newsletter.

Vicky Maloney

Event and Membership Coordinator

Vicky Maloney is responsible for event logistics for our live, instructor-led courses, as well as numerous other administrative tasks. She also plays a key role in organizing our annual security and compliance summit. Vicky also has the role of membership coordinator, ensuring that our membership program’s processes are well executed.

Marianne Schroeder

Financial Administrator

Marianne Schroeder is EnergySec’s financial administrator. She handles a wide range of important back office tasks related to billing, payments, benefits, and financial reporting.

Mary Parker

Volunteer Coordinator

Mary Parker is EnergySec’s coordinator for our numerous volunteer programs, including our Speaker’s Bureau and mentorship programs. She brings to EnergySec her expertise as an Executive Assistant who co-ordinated events in the educational realm.

Kristen Bresler

Summit Logistics

Kristen Bresler is responsible for the logistics of our annual summit and our Hawaii Education Series. She works with the hotels on everything from room blocks to menu selections to AV equipment. Kristen’s “behind-the-scenes” work insures that these events are a success.