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Adley Services, LLC is a Louisiana licensed professional engineering firm anchored by our president, Susan Frizzell. She has almost 20 years of engineering experience. Furthermore, she is an industry leader and innovator in both the offshore and onshore aspects of oil and gas. Whether it is complying with BSEE, facilitating a HAZOP analysis, or valve/piping calculations, Adley Services is your preferred provider. Our staff has extensive training and experience with shelf and deepwater facilities, refineries, midstream operations, fit for service evaluations, API 653 inspections, and well pad sites. In all things we do, we seek to add value to our client’s business. We accomplish this by listening to our client’s needs and making sure we work as efficiently as possible. Although Adley Services calls Lafayette, Louisiana home, our place of work is nationwide…and beyond. Some of our deep-water facility projects take place extreme distances off of the coast of the United States.

Our list of satisfied clients is extensive and ever-growing. We are fully insured and safety compliant. Our company’s motto is very simple. We know our clients pay us with the greatest currency in the world and all they expect in return is the highest talented/best-trained people in the industry to do their absolute best- every time and all the time. At Adley Services, professionalism, integrity, and ethics are non-negotiable and not subject to compromise. Moreover, Safety is more than our policy, it is our mindset. We know our employees have families, and we want to make absolutely sure they return home to them safe and sound. Finally, Adley Services is an equal opportunity employer that strives to be proactive in ensuring that those who work for and do business for us are as diverse as this great country.

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The well-being of my employees, my clients, and my environment is my personal responsibility, a charge that I take very seriously.

Susan Frizzell

President of Adley Services, LLC


Susan Frizzell, PE

President, Principal Engineer

337-345-6611, ext. 110

Susan is President and Founder of Adley Services. She has 20 years of engineering experience in a variety of industrial settings. She is an industry leader and innovator in onshore and offshore oil and gas. She manages all aspects of engineering management and client relations for Adley Services. Susan has a BS in Mechanical Engineering from the University of Louisiana at Lafayette and an MBA from Amberton University. She is licensed as a Professional Engineer in Louisiana and Texas and has specialty training as a PHA Facilitator. She serves on the Board of Directors for LAGCOE and is a member of Louisiana Engineering Society and the American Legion Auxiliary.

Brad Frizzell, PE

Senior Engineer & Partner

3373456611, ext. 113

Brad has a BS in Electrical Engineering from the University of Louisiana at Lafayette and a Juris Doctorate from the Loyola School of Law. He is a licensed patent attorney in the State of Louisiana, a member of the Louisiana Bar Association, and serves as Adley’s In-House Counsel. Brad also has his Professional Engineering license in Control Systems in Louisiana. Brad is a Senior Engineer and manages many facets of Adley including FOIA’s for clients, marketing, sales, IT, and safety training. In addition, he is a Licensed Electrician, a PHA Facilitator, and a certified API 653 Tank Inspector and API 510 Vessel Inspector. He serves as a Judge Advocate for Post 241 of American Legion. He has served in the Army Reserves and the Louisiana Army National Guard as a Chemical Weapons Specialist.

Adele F. Mayeaux, EI

Project Engineer

337-345-6611, ext. 114

Adele is a Project Engineer at Adley Services. As Project Engineer, her experience includes PSM audits, facilities engineering, and PHA facilitation. Adele brings a vast wealth of knowledge as her career began with hands-on experience on the drilling rig floor with a top firm in the oil and gas industry. With her experience in test tool selection, logistics and leading job failure investigations, Adele is able to offer our clients solutions that are economical and realistic. Adele has a BS in Mechanical Engineering from the University of Louisiana at Lafayette. She has also taken leadership courses at Texas A&M College of Business. She is on the executive committee for the Young Professionals of LAGCOE and active in many other industry events.

Marcus Stelly

Lead Designer/Engineering Tech

337-345-6611, ext. 112

Marcus is well known in the chemical and energy industry and serves as a Lead Designer and Engineering Tech at Adley. With over 15 years of experience, he delivers quality drafting projects on-time and on-budget. Marcus’ design precision is highly sought after in the industry and meets the specifications industry specialists are accustomed to seeing. He also supports the engineering staff with compliance reviews. Marcus has a degree in Drafting and Design Technology from the Louisiana Technical College.

Melissa Duhon


337-345-6611, ext. 118

Melissa brings to Adley Services over 25 years of experience in accounting and working with professional service firms. Melissa is innovative in her financial forecast methodologies and performance metrics. Melissa also has many years of experience in human resources management and helps Adley with HR and benefits management. Melissa also helps Adley foster a strong corporate culture making Adley a great place to work. Melissa has a BBA in Accounting from the University of Louisiana at Lafayette and is a certified notary. View available employment opportunities at Adley.

Joel Dempster

Junior Engineer

337-345-6611, ext. 119

Joel is a recent graduate of college at the University of Louisiana at Lafayette where he completed his degree in Mechanical Engineering with a minor in Mathematics. Joel began working with Adley Services as an Intern while he completed his degree. Joel currently assists with drafting, calculations, designs and client relations. Joel’s strong technical aptitude and design capabilities make him a great addition to the Adley Services team.

Serena Mills

Market Research Coordinator

Serena is a junior at the University of Louisiana at Lafayette working on her degree in Accounting. She assists the engineers in project completion, aids our marketing department with data processing, and is responsible for administrative duties. Her positive attitude and ability to be resourceful and adamant makes her a great new addition to Adley Services.

At Adley Services, we like to attract and retain people who have passion for engineering and share our core values of honesty and integrity. Click on the button below to apply for open positions with Adley Services.