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Our Team

Alan Bieberstein

Cornerstone's President

Having been an Electrician most of his adult life, he has always loved this line of work. Alan went through a 4 year apprenticeship program, working for various electrical contractors and on a variety of projects. Wherever he worked he was always promoted due to his eagerness to expand his knowledge and his love of this work. In 2005, Alan took everything he owned and with a small Astro van started Cornerstone Electrical Contractors. His reputation for quality, knowledgeable work soon spread, and he quickly found the business growing. Cornerstone Electric has maintained that growth and positive customer relationship throughout the years. Alan’s ability to instill his values of the business into the employees is what helps this company continue to grow. Alan is married to his very patient and lovely wife, Margaret. He has three daughters, three sons and multiple grandchildren that help keep him active.

“I love finding solutions to problems, whether they are more innovative methods or empowering the workforce, it keeps me motivated every day.”

Alan Bleberstein

Cornerstone's President

Having been an Electrician most of his adult life, he has always loved this line of work. Alan went through a 4 year apprenticeship program, working for various electrical contractors and on a variety of projects. Wherever he worked he was always promoted due to his eagerness to expand his knowledge and his love of this work.
In 2005, Alan took everything he owned and with a small Astro van started Cornerstone Electrical Contractors. His reputation for quality, knowledgeable work soon spread, and he quickly found the business growing. Cornerstone Electric has maintained that growth and positive customer relationship throughout the years. Alan’s ability to instill his values of the business into the employees is what helps this company continue to grow.
Alan is married to his very patient and lovely wife, Margaret. He has three daughters, three sons and multiple grandchildren that help keep him active.

“I love finding solutions to problems, whether they are more innovative methods or empowering the workforce, it keeps me motivated every day.”

Jeremy Eldridge

In-House Prefab Technician & Purchasing Agent

He utilizes his knowledge and communication skills to ensure all supplies arrive accurately and on time. He believes that quality craftmanship is of the utmost importance which motivates him to always work hard and excel in his job.

Jeremy’s previous experience includes heavy equipment operator and crew leader in underground construction. In his spare time he enjoys family, friends and spending time in the outdoors of Arizona.

Jeremy Eldridge

In-House Prefab Technician & Purchasing Agent

He utilizes his knowledge and communication skills to ensure all supplies arrive accurately and on time. He believes that quality craftmanship is of the utmost importance which motivates him to always work hard and excel in his job.
Jeremy’s previous experience includes heavy equipment operator and crew leader in underground construction. In his spare time he enjoys family, friends and spending time in the outdoors of Arizona.

Joan Slocum

Financial & Administrative Support

Her responsibilities include bookkeeping, office management and human resources. She loves organization, giving attention to detail, promoting a positive atmosphere and being a part of the Cornerstone team.

Before devoting herself to Cornerstone, Joan used her experience as a professional ballet dancer to teach dance to K-5th graders, providing much needed arts education for Tucson public school students. Joan is a wife, mother of four daughters and one son-in-law, and a proud grandmother.

“Whatever you do, work at it with all your heart, as working for the Lord.” Colossians 3:23

Joan Slocum

Financial & Administrative Support

Her responsibilities include bookkeeping, office management and human resources. She loves organization, giving attention to detail, promoting a positive atmosphere and being a part of the Cornerstone team.
Before devoting herself to Cornerstone, Joan used her experience as a professional ballet dancer to teach dance to K-5th graders, providing much needed arts education for Tucson public school students. Joan is a wife, mother of four daughters and one son-in-law, and a proud grandmother.

“Whatever you do, work at it with all your heart, as working for the Lord.” Colossians 3:23
2201 E 21st St
Tucson, AZ 85719
(520) 733-6250
Mon - Fri | 6 AM to 3 PM

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