Greg Grosch, Chief Executive Officer
Keith Costello - Vice President, Sales & Marketing
Don Nicholas - President, California Division
Dara P. Kargari - Vice President, Finance
Sandra Mahoney - Director, Human Resources

Greg Grosch
Chief Executive Officer

Greg has a long history of successfully managing companies for growth and profitability, with over 30 years experience in the supply and construction industries. He has extensive knowledge of all sectors of these industries, from residential construction to high-rise and infrastructure projects. Most notably, Greg founded White Cap Industries in 1976, and served as CEO and President of White Cap for 25 years, growing revenues to over $350 million before his departure in 2001. White Cap is now wholly owned by HD Supply. For eight years prior to joining TCSC, Greg worked as an industry consultant to private equity firms, private and publically traded companies, and was involved in the consolidation of several companies previously owned by Stock Supply, and in the sale of the assets of Orco Construction Supply to HD Supply.

Greg received his B.S. degree in Business Administration at California State University Northridge in 1973.

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Keith Costello
Vice President, Sales & Marketing

As Vice President, Sales, Keith is responsible for the coordination and implementation of the domestic sales strategy for TCSC’s family of companies. Keith has over 20 years proven success of growing profitable sales while integrating several acquisitions in the construction-related product markets. Prior to TCSC, he was Executive Vice President of Sales and led the overall sales organization at ORCO Construction Supply, a leading distributor of supply products serving professional contractors. As General Manager and then Vice President of Sales, Keith grew sales from $90M to $320M while improving margins. He also managed sales and business development for 23 branches and 180 sales associates throughout the company.

Keith received his B.S. degree in Finance from San Diego State University.

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Don Nicholas
President, California Division

Don Nicholas was appointed President, California Division, in 2007, and is responsible for coordinating and implementing the traffic control processes and business expansion for TCSC’s family of companies in California. Don has over 25 years leadership experience in the traffic control and safety services industry, and began his career in traffic control at Flash Safety Co. in Sacramento. In 1987, Don co-founded Statewide Safety & Signs in Grover City and expanded operations throughout the state with locations in Poway, Nipomo, San Jose and Fairfield. He successfully grew the organization to $11M in revenue and 60 employees prior to selling the company to TCSC in 2007 and joining the TCSC management team.

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Dara P. Kargari
Vice President, Finance

Dara Kargari has an extensive background in financial management, having spent 6 of his 12 years in the accounting profession as Controller. Throughout his career, Dara has demonstrated an outstanding ability to coordinate and direct all phases of both recurring and project based accounting efforts. Most recently in early 2008, First American Corporation retained Dara as a consultant to help facilitate the spinoff of its Financial Services Companies. Before consulting with First American, Dara served as Controller for the retail division of Nationwide Auction Systems, where he implemented cost cutting strategies that reduced the company’s net loss by $5 million. Prior to this, Dara held numerous positions in Accounting and Finance, and was responsible for financial and regulatory audit compliance, Sarbanes-Oxley compliance, month-end close and day-to-day financial operations. Dara started his career as a Senior Auditor at Deloitte & Touche, LLP in Los Angeles in the Manufacturing and Technology practice.

Dara received his BS in Business Administration, with a major in Accounting, from California State University, Northridge. He is also a Certified Public Accountant.

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Sandra Mahoney
Director, Human Resources

Sandra Mahoney is a Human Resources professional with over 15 years experience managing HR activities for both domestic and international companies. She brings with her an extensive wealth of knowledge on HR best practices, current employee issues and employment law. Sandra began her career in the mortgage and financial markets, including a consultant role for an international placement firm for finance and accounting professionals. In 1996 Sandra became Manager of Human Resources at Rockwell Collins Passenger Systems (formerly Sony Trans Com), a leader in in-flight entertainment systems. In her role, she implemented numerous programs including a performance management system based on critical behaviors, a peer rewards program and a Six Sigma quality process to increase recruitment efficiency. Sandra left Rockwell Collins for Quantum Corporation in 2001, where she was the Director of Human Resources for Quantum’s Storage Systems division, a group that employs over 600 people internationally. During her tenure, she increased process efficiency and implemented company-wide initiatives for talent development, compensation, workforce planning and organizational integration. In 2005 Ms. Mahoney joined Allergan, Inc., a $4B+ multi-specialty health care company as the Human Resources strategic partner providing consultation to senior business leaders of the company’s Global Technical Operations and Corporate groups significantly increasing the workforce bench strength and efficiencies through workforce planning, talent alignment and development.

Sandra received her MS in Human Resources Management from Chapman University and her BA in Psychology from the University of California, Santa Barbara.

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