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 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.”
Nicole Martinez
Project Assistant
Nicole ensures every project has what it needs and when they need it for a successful and smooth experience. Her creativity, collaboration and advanced office skills contribute to the team to improve processes, project safety, timeliness, quality, and value. Her ownership of each project ensures that they all run smoothly and each customer needs are met. Her previous experience includes working as a customer service supervisor for an advanced materials distribution company.
Nicole spends her free time making memories with family, friends, and her four-legged fur baby.
“Everything you do is a signature of yourself. So, sign it with style.” -Unknown
Nicole Martinez
Project Assistant
Nicole ensures every project has what it needs and when they need it for a successful and smooth experience. Her creativity, collaboration and advanced office skills contribute to the team to improve processes, project safety, timeliness, quality, and value. Her ownership of each project ensures that they all run smoothly and each customer needs are met. Her previous experience includes working as a customer service supervisor for an advanced materials distribution company.
Nicole spends her free time making memories with family, friends, and her four-legged fur baby.
“Everything you do is a signature of yourself. So, sign it with style.” -Unknown
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
