Our Team

Senior Management

AEGIS is led by a seasoned and stable team of executives with diverse backgrounds who are fiercely loyal to our employees and our clients. Together they have grown AEGIS from a small consultancy to one that is thriving in the federal and commercial markets, achieving key corporate certifications, contributing solutions to some of the most critical challenges in government, and developing a health IT business unit that is making a significant impact on improving healthcare for everyone. See their bios and access their LinkedIn profiles below.

After a decade of hands-on experience in software engineering and business consulting, Mr. Callihan has served as AEGIS’ president since 2004. His expertise is in helping customers develop best practices in IT implementations with improved processes, transparency and informed decision-making.

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Read More About Michael

Mr. Michael Callihan
President

Mr. Hyland's background as an entrepreneur includes numerous successful business endeavors in a variety of industries. He turned his passion for technology into a career culminating in founding AEGIS in 1996. Today his focus is on information exchange interoperability and using IT to improve healthcare around the world.

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Read More About Mario

Mr. Mario Hyland
Sr. Vice President & Founder

On the AEGIS leadership team since 2000, Mr. Lourenco has over three decades of experience in project management; business case development; business and technical analysis; software design, development and testing; and independent verification & validation.

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Read More About Tom

Mr. Tom Lourenco
Executive Vice President of Services

Ms. Holzle has extensive experience managing all aspects of AEGIS' business operations. This includes core financial systems, payroll, taxes, capital acquisitions, lease management, and human resources. Ms. Holzle is a member of AEGIS' Process Action Team (PAT) and served as a member of the SCAMPI Class A appraisal team that evaluated AEGIS for our CMMI Maturity Level 3 rating.

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Read More About Monica

Ms. Monica Holzle
Chief Financial Officer

Advisory Board

AEGIS is honored to have a distinguished group of highly respected IT leaders serving on our Advisory Board, assisting the senior management team in strategic and tactical planning as well as business opportunity development.

Dr. West is the past CIO of six (6) federal agencies, an accomplished executive in the private sector and company founder.

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Read More About Barry

Dr. Barry West

Ms. Hunter is a well-known fixture in the federal health IT space with a wide range of leadership accomplishments.

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Read More About Joyce

Ms. Joyce Hunter

Mr. Chen is a serial entrepreneur, investor and mentor.

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Read More About Steven

Mr. Steven Chen

AEGIS Operations

Here is the team that keeps AEGIS running like a well-oiled machine.


Ms. Catherine Holzle

Ms. Catherine Holzle

As the AEGIS General Counsel, Catherine manages contract administration, and she deftly guides AEGIS teams, our clients and partners to craft agreements that are win-win.

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Ms. Linda Mager

Ms. Linda Mager

As the AEGIS accounting ace, Linda wrangles the numbers for her day job, and she counts fiscal quarters to fall asleep. This is the limit of this content, but it's not bad.

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Ms. Sara Suan

Ms. Sara Suan

As the AEGIS people piper, Sara keeps the payroll trains running on time for her day job, and she herds AEGIS cats in her spare time. This is the limit of this content, but it's not bad.

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Ms. Mariana Carrese

Ms. Mariana Carrese

As the AEGIS legal eagle, Mariana turns phrases for mutual benefit for her day job, and she ponders the Age of Reason in her spare time. This is the content limit, but not bad.

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