About Us

INTEGRITY Security Services (ISS) is a wholly owned subsidiary of Green Hills Software LLC., established to provide best practice embedded security products and services for the protection of smart devices in all industries from cyber security attacks. ISS experience in cryptographic engineering and embedded development enables us to assemble an exceptional team of experienced resources to meet your product needs.

The Mission

ISS delivers end-to-end, layered, embedded security solutions to protect intelligent devices and their supply chains


David Sequino

Co-Founder & CEO

With more than two decades experience, David is delivering next generation security. As VP of Sales, Marketing and Product Management, David and team built Certicom into a leading security provider, tripling the size of the company before its sale. David holds a bachelor of science degree in electrical engineering from Northeastern University and attended MIT’s Sloan School of Management’s Executive Leadership program.

More on David Sequino & ISS

Greg Powell

Co-Founder & CTO

Founder and CEO of Valicore Technologies with over 20 years experience leading high tech engineering teams developing cryptographic microprocessors, accelerators, and tokens for US government and commercial applications. Greg began as engineer on Type 1 government Clipper, Capstone, and Fortezza-card programs; quickly advancing to Fellow Scientist and patent holder. Greg holds a BS in Computer Science from the University of California, Irvine.

Bill Lattin

Co-Founder & CSA

Leading the security consulting services teams, Bill has over 30 years of experience in the fields of commercial and government information security. As CTO of Certicom Corp and co-founder of Cylink Corporation, he built the first high speed link encryptors, gaining broad expertise in cryptosystem design, public key cryptography, code signing, and key injection. Bill holds a BSEE from Stanford University and MSEE from UC Santa Barbara.

Alan Meyer

VP of Engineering

Prior to joining ISS in 2015, Alan brings over 25 years of experience managing, developing, and delivering embedded products to market. Alan previously worked as Director of Engineering for Western Digital where he program managed drive programs, ran the platform firmware organization, and developed hard disk drive security subsystems, which enabled Full Disk Encryption and the TCG Enterprise SSC and Opal SSC solutions. Alan holds a BS in Electrical Engineering from the University of California, Davis.

Office Locations

ISS Headquarters

30 W Sola Street
Santa Barbara, CA 93101
(888) 951-4477

North America Offices

300 Spectrum Center Drive
Suite 800
Irvine, CA 92618
6811 Benjamin Franklin Drive
Suite 150
Columbia, MD 21042
19415 Deerfield Avenue
Suite 204
Lansdowne, VA 20176
34125 US Hwy 19 North
Suite 100
Palm Harbor, FL 34684

33533 West 12 Mile Road
Suite 365
Farmington Hills, MI 48331
883 Boylston St.
3rd Floor
Boston, MA 02116



Goodsons Mews, Wellington Street
Thame, Oxfordshire, OX9 3BX
United Kingdom
ph: +44 (0)1844 267950


Delivery: Fokkerstraat 13-15, 3833 LD
Postal: Postbus 147, 3830 AC
The Netherlands
ph: +31 (0)33 4613363


Shop and Office Tower 6F
148-2, Kashiwa-no-ha Campus
178-4 Wakashiba, Kashiwa-shi,
Chiba-ken 277-8520


No.140, 7 branch of 1168 Lane Xiuyan Road
Pudong New District
Shanghai China


Level 4, 80 Market St
South Melbourne VIC 3205

About Green Hills Software

Green Hills Software is the largest independent embedded software provider. With the most safety and security certifications and the best track record for solving embedded problems, Green Hills Software has been leading the embedded world since 1982.

The INTEGRITY and µ-velOSity real-time operating systems, IPv6-ready TCP/IP networking stacks, MULTI and AdaMULTI integrated development environments, DoubleCheck integrated static analyzer and TimeMachine tool suite offer a complete development solution that addresses both deeply embedded and high-reliability applications.

Green Hills Software LLC. was founded in 1982, is privately held, has been profitable since its inception. Green Hills Software has averaged nearly 30% per year revenue growth and is now the world's largest independent RTOS company. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom.

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